California Frost Dates: Last and First Frost by Town

373 NOAA weather stations · 1991–2020 U.S. Climate Normals · Data updated 2026-10-29

Quick answer

Across California's 332 NOAA stations with regular frost, the median last spring frost is February 23 and the median first fall frost is December 1. Last frost dates range from December 29 at Point Mugu Nf to June 14 at Jess Valley, so enter your ZIP code below for the station nearest you.

How frost dates vary across California

Elevation matters: across California's stations, each 1,000 ft of elevation delays the median last frost by about 21 days.
North vs south: stations in the northern third of the state (north of 38.2°N) reach their median last frost about 60 days later than the southern third (south of 35.4°N).
Safety margin: the median 10%-risk date (March 31) is about 36 days after the median last frost. Waiting until then cuts the chance of a killing frost on tender transplants from 1 in 2 to 1 in 10.
Frost-free sites: 32 stations rarely see 32°F at all.

Frost dates at California's major weather stations

These National Weather Service stations, mostly at airports, have the longest and most complete records in the state.


Alturas Municipal Airport	4,375	Jun 3	Jun 24	Sep 12	97
Arcata Eureka Airport	200	Mar 8	Apr 15	Nov 30	262
Avalon Catalina Airport	1,602	Rare	Rare	Rare	365
Bakersfield Airport	489	Jan 17	Feb 18	Dec 15	334
Barstow Daggett Airport	1,917	Feb 19	Mar 11	Nov 26	279
Bishop Airport	4,102	Apr 29	May 27	Oct 15	166
Blue Canyon Airport	5,276	May 4	May 31	Nov 4	183
Blythe Airport	395	Jan 5	Feb 18	Dec 21	347
Bodega 6 WSW	63	Jan 1	Feb 24	Dec 31	365
Burbank Glendale Pasadena Airport	741	Dec 31	Jan 15	Dec 28	365
Camarillo Airport	77	Dec 31	Feb 2	Dec 28	365
Camp Pendleton McAs	75	Feb 16	Mar 18	Dec 8	298
Campo Asos	2,641	Apr 29	Jun 1	Nov 1	184
Carlsbad Palomar Airport	328	Rare	Rare	Rare	365
China Lake Naf	2,230	Mar 11	Apr 9	Nov 12	244
Chino Airport	650	Jan 17	Feb 22	Dec 19	335
Concord Buchanan Field	18	Jan 9	Feb 12	Dec 14	343
Crescent City McNamara Airport	56	Jan 30	Mar 13	Dec 25	334
Desert Resorts Regional Airport	-118	Feb 7	Mar 1	Dec 2	298
El Centro Naf	-42	Jan 6	Feb 6	Dec 21	347
Eureka WFO Woodley Island	20	Feb 22	Mar 23	Dec 7	293
Fallbrook 5 NE	1,140	Feb 2	Feb 24	Jan 30	365
Fresno Yosemite Intl Airport	333	Jan 14	Feb 11	Dec 14	337
Fullerton Municipal Airport	96	Rare	Rare	Rare	365
Hanford Municipal Airport	249	Feb 20	Mar 21	Nov 23	276
Hawthorne Municipal Airport	63	Rare	Rare	Rare	365
Hayward Air Terminal	43	Jan 2	Jan 27	Dec 25	365
Imperial Beach Ream Field NAS	24	Rare	Rare	Rare	365
Imperial County Airport	-58	Jan 14	Feb 15	Dec 24	346
Lancaster Wm J Fox Field	2,338	Apr 3	Apr 23	Nov 1	211
Lemoore Reeves NAS	232	Feb 24	Mar 30	Nov 22	265
Livermore Municipal Airport	393	Feb 27	Mar 29	Dec 1	278
Long Beach Daugherty Field	31	Rare	Rare	Rare	365
Los Angeles Dwtn Usc Campus	230	Rare	Rare	Rare	365
Los Angeles Intl Airport	97	Rare	Rare	Rare	365
Madera Municipal Airport	253	Feb 12	Mar 17	Nov 30	293
Marysville Yuba County Airport	62	Feb 11	Mar 12	Nov 30	289
Merced 23 WSW	78	Mar 28	Apr 27	Nov 14	233
Merced Municipal Airport	152	Feb 26	Apr 1	Nov 25	273
Modesto City County Airport	73	Jan 31	Feb 25	Dec 5	312
Moffett Federal Airfield	39	Jan 6	Feb 4	Dec 23	353
Montague Siskiyou County Airport	2,635	May 12	Jun 1	Oct 8	148
Monterey Peninsul Airport	165	Jan 2	Jan 20	Dec 23	363
Mount Shasta	3,535	May 6	May 28	Oct 12	158
Napa County Airport	14	Mar 5	Apr 16	Nov 21	256
Needles Airport	890	Jan 6	Feb 10	Jan 2	365
North Island NAS	26	Rare	Rare	Rare	365
Oakland Metro Intl Airport	6	Jan 7	Feb 8	Dec 23	356
Oceanside Municipal Airport	28	Jan 23	Feb 22	Dec 11	325
Ontario Intl Airport	949	Jan 4	Feb 7	Dec 30	365
Oroville Municipal Airport	190	Jan 29	Feb 28	Dec 7	317
Oxnard Ventura County Airport	36	Rare	Rare	Rare	365
Palm Springs Regional Airport	421	Jan 9	Jan 29	Jan 9	365
Palmdale Airport	2,524	Mar 18	Apr 11	Nov 15	241
Paso Robles Municipal Airport	810	Apr 4	Apr 27	Nov 5	213
Point Mugu Nf	13	Dec 29	Jan 15	Dec 24	365
Ramona Airport	1,393	Mar 19	Apr 10	Nov 23	248
Red Bluff Municipal Airport	353	Feb 22	Mar 30	Nov 29	281
Redding 12 WNW	1,418	Mar 19	Apr 11	Nov 22	250
Redding Municipal Airport	497	Mar 3	Apr 9	Nov 21	261
Riverside Municipal Airport	805	Jan 9	Feb 21	Dec 30	362
Sacramento 5 ESE	38	Jan 12	Feb 8	Dec 16	341
Sacramento Executive Airport	15	Feb 2	Mar 5	Dec 2	301
Sacramento Metro Airport	23	Feb 22	Apr 1	Nov 24	277
Salinas Municipal Airport	74	Jan 29	Mar 1	Dec 10	325
San Diego Brown Field	515	Jan 6	Feb 5	Dec 31	365
San Diego Lindbergh Field	15	Rare	Rare	Rare	365
San Diego Miramar NAS	477	Rare	Rare	Rare	365
San Diego Montgomery Field	417	Rare	Rare	Rare	365
San Francisco Dwtn	150	Rare	Rare	Rare	365
San Francisco Intl Airport	8	Dec 29	Jan 13	Dec 26	365
San Jose	51	Jan 12	Feb 14	Dec 22	347
San Luis Obispo Airport	200	Jan 31	Mar 7	Dec 11	319
Sandberg	4,510	Apr 15	May 9	Nov 26	224
Santa Ana John Wayne Airport	54	Rare	Rare	Rare	365
Santa Barbara 11 W	18	Dec 31	Jan 29	Dec 20	365
Santa Barbara Municipal Airport	9	Jan 11	Feb 13	Dec 16	342
Santa Maria Public Airport	242	Feb 4	Mar 16	Dec 13	315
Santa Monica Municipal Airport	174	Rare	Rare	Rare	365
Santa Rosa Sonoma County Airport	114	Mar 2	Apr 2	Nov 20	262
South Lake Tahoe Airport	6,314	Any month	Any month	Any month	63
Stockton Metro Airport	26	Feb 6	Feb 28	Dec 1	304
Stovepipe Wells 1 SW	84	Jan 4	Jan 23	Dec 22	352
Torrance Airport	90	Jan 9	Feb 24	Jan 5	365
Ukiah Municipal Airport	601	Mar 5	Apr 7	Nov 21	259
Vacaville Nut Tree Airport	109	Feb 18	Mar 25	Nov 28	283
Van Nuys Airport	770	Dec 31	Jan 27	Dec 30	365
Watsonville Municipal Airport	160	Jan 31	Mar 9	Dec 9	317
Yosemite Village 12 W	6,620	May 12	Jun 4	Nov 1	171

All 373 stations in California

Last frost and first frost are medians: a 50% chance of a 32°F night after (spring) or before (fall) that date. 10% risk is the spring date with only a 1-in-10 chance of a later frost. Click a column to sort.

Filter by station name


Adin Ranger Station	4,195	May 28	Jun 16	Sep 29	125
Alpine	1,695	Feb 12	Mar 20	Dec 24	317
Alturas	4,378	Jun 3	Jun 26	Sep 13	97
Alturas Municipal Airport	4,375	Jun 3	Jun 24	Sep 12	97
Anaheim	235	Rare	Rare	Rare	365
Angwin Pacific Union College	1,715	Apr 7	Apr 30	Dec 5	245
Antioch Pumping Plt #3	60	Jan 12	Feb 1	Dec 19	343
Arcata Eureka Airport	200	Mar 8	Apr 15	Nov 30	262
Ash Mountain	1,708	Mar 12	Apr 16	Dec 9	273
Auberry 2 NW	2,090	Mar 25	Apr 22	Dec 3	253
Auburn	1,292	Feb 25	Apr 7	Dec 5	286
Avalon Catalina Airport	1,602	Rare	Rare	Rare	365
Baker	962	Feb 14	Mar 4	Nov 27	287
Bakersfield 5 NW	470	Jan 31	Feb 27	Dec 8	312
Bakersfield Airport	489	Jan 17	Feb 18	Dec 15	334
Balch Pwr House	1,735	Feb 23	Apr 4	Dec 12	294
Barstow	2,220	Feb 22	Mar 24	Nov 23	271
Barstow Daggett Airport	1,917	Feb 19	Mar 11	Nov 26	279
Ben Lomond #4	420	Mar 25	Apr 21	Nov 11	231
Berkeley	310	Jan 3	Feb 14	Jan 1	365
Big Bar 4 E	1,253	Apr 16	May 3	Oct 31	197
Big Bear Lake	6,753	May 27	Jun 9	Oct 4	131
Big Sur Station	200	Feb 13	Apr 1	Dec 27	323
Bishop Airport	4,102	Apr 29	May 27	Oct 15	166
Blue Canyon Airport	5,276	May 4	May 31	Nov 4	183
Blythe	268	Jan 25	Feb 24	Dec 12	325
Blythe Airport	395	Jan 5	Feb 18	Dec 21	347
Boca	5,575	Any month	Any month	Any month	33
Bodega 6 WSW	63	Jan 1	Feb 24	Dec 31	365
Bodie California St Historic P	8,370	Any month	Any month	Any month	14
Borrego Desert Park	810	Jan 10	Feb 16	Jan 1	365
Bowman Dam	5,385	May 12	Jun 2	Oct 29	167
Brawley 2 SW	-100	Jan 16	Feb 17	Dec 19	335
Bridgeport	6,470	Any month	Any month	Any month	69
Burbank Glendale Pasadena Airport	741	Dec 31	Jan 15	Dec 28	365
Burbank Valley Pump Plt	655	Jan 2	Jan 31	Dec 26	364
Burney	3,198	Jun 3	Jun 19	Sep 14	102
Buttonwillow	225	Feb 9	Mar 6	Nov 26	289
Cachuma Lake	789	Apr 11	May 6	Nov 8	209
Calaveras Big Trees	4,695	May 7	May 31	Oct 28	169
Calistoga	400	Mar 2	Apr 18	Nov 23	263
Callahan	3,085	May 20	Jun 12	Oct 5	135
Camarillo Airport	77	Dec 31	Feb 2	Dec 28	365
Camp Pardee	658	Jan 22	Mar 1	Dec 17	332
Camp Pendleton McAs	75	Feb 16	Mar 18	Dec 8	298
Campo	2,630	Apr 30	Jun 1	Oct 26	174
Campo Asos	2,641	Apr 29	Jun 1	Nov 1	184
Canby 3 SW	4,310	Jun 1	Jun 20	Sep 16	106
Canyon Dam	4,560	May 18	Jun 9	Oct 8	143
Carlsbad Palomar Airport	328	Rare	Rare	Rare	365
Carmel Valley	480	Feb 20	Mar 27	Dec 8	294
Cecilville	2,310	Apr 27	May 17	Oct 21	176
Cedarville	4,688	May 15	Jun 6	Oct 1	137
Cherry Valley Dam	4,765	May 2	May 29	Nov 4	183
Chester	4,530	May 28	Jun 13	Sep 28	124
Chico University Farm	185	Mar 4	Apr 2	Nov 17	257
China Lake Naf	2,230	Mar 11	Apr 9	Nov 12	244
Chino Airport	650	Jan 17	Feb 22	Dec 19	335
Chiriaco Summit	1,706	Feb 5	Mar 5	Dec 17	313
Chula Vista	56	Rare	Rare	Rare	365
Clearlake 4 SE	1,349	Apr 10	Apr 30	Nov 6	209
Cloverdale	400	Feb 25	Apr 2	Dec 3	279
Coalinga	670	Feb 14	Mar 8	Nov 30	292
Colfax	2,380	Apr 3	Apr 29	Nov 24	233
Colusa 2 SSW	50	Feb 14	Mar 31	Dec 1	293
Concord Buchanan Field	18	Jan 9	Feb 12	Dec 14	343
Concord Wwtp	40	Jan 7	Feb 1	Dec 19	346
Copco #1 Dam	2,703	May 4	May 31	Oct 21	168
Corcoran Irrig Dist	200	Feb 15	Mar 10	Nov 27	285
Covelo	1,413	Apr 23	May 11	Oct 19	179
Crescent City 3 NNW	43	Mar 11	Apr 12	Nov 23	256
Crescent City McNamara Airport	56	Jan 30	Mar 13	Dec 25	334
Culver City	92	Rare	Rare	Rare	365
Cuyamaca	4,640	Apr 19	May 14	Oct 27	190
Davis 2 WSW Experiment Farm	60	Feb 10	Mar 11	Dec 1	295
De Sabla	2,710	Apr 17	May 11	Nov 11	206
Death Valley National Park	-194	Jan 1	Jan 21	Dec 19	350
Delano	302	Jan 31	Mar 5	Dec 8	309
Desert Resorts Regional Airport	-118	Feb 7	Mar 1	Dec 2	298
Dobbins 1 S	1,640	Apr 1	Apr 22	Nov 17	229
Donner Memorial State Park	5,937	Any month	Any month	Any month	81
Downieville	2,915	Apr 28	May 22	Oct 25	178
Doyle 4 SSE	4,390	May 21	Jun 11	Oct 1	130
Dunsmuir Trtmt Pl	2,169	Apr 23	May 12	Oct 27	185
Eagle Mountain	973	Jan 10	Feb 14	Jan 8	365
East Park Rsvr	1,205	Apr 6	Apr 25	Nov 10	219
El Cajon	495	Jan 6	Feb 7	Dec 21	350
El Capitan Dam	600	Mar 19	Jun 1	Dec 8	270
El Centro 2 SSW	-30	Jan 3	Feb 4	Dec 27	363
El Centro Naf	-42	Jan 6	Feb 6	Dec 21	347
El Mirage	2,950	Mar 21	Apr 22	Nov 12	235
Elsinore	1,268	Jan 28	Feb 27	Dec 18	329
Escondido #2	600	Jan 2	Feb 4	Dec 30	365
Eureka WFO Woodley Island	20	Feb 22	Mar 23	Dec 7	293
Fairfield	40	Jan 15	Feb 16	Dec 14	336
Fairmont	3,060	Apr 6	May 20	Nov 29	236
Fallbrook 5 NE	1,140	Feb 2	Feb 24	Jan 30	365
Five Points 5 SSW	285	Feb 27	Apr 13	Nov 26	271
Fort Bidwell	4,739	May 26	Jun 13	Oct 1	127
Fort Bragg 5 N	123	Mar 2	Apr 6	Dec 1	272
Fort Ross	112	Feb 26	May 1	Dec 27	310
Fremont	38	Jan 7	Feb 7	Dec 22	353
Fresno 5 NE	338	Jan 30	Mar 4	Dec 11	319
Fresno Yosemite Intl Airport	333	Jan 14	Feb 11	Dec 14	337
Friant Government Camp	410	Mar 9	Apr 16	Dec 1	262
Fullerton Municipal Airport	96	Rare	Rare	Rare	365
Georgetown Ranger Station	3,001	Apr 12	May 10	Nov 21	221
Getty Center	1,117	Rare	Rare	Rare	365
Gibraltar Dam #2	1,558	Mar 20	Apr 16	Nov 27	250
Gilroy	194	Feb 24	Apr 4	Nov 27	277
Glennville	3,140	May 11	Jun 6	Oct 17	155
Grant Grove	6,580	Jun 1	Jun 15	Oct 7	132
Grass Valley #2	2,400	Apr 10	Apr 30	Nov 13	215
Graton	200	Mar 20	Apr 19	Nov 13	240
Grizzly Creek State Park	413	Mar 4	Apr 8	Nov 22	264
Groveland 2	2,800	Apr 22	May 14	Nov 2	192
Haiwee	3,825	Apr 17	May 8	Nov 1	196
Half Moon Bay	27	Feb 6	Mar 25	Dec 17	328
Hanford 1 S	237	Feb 7	Mar 4	Dec 1	296
Hanford Municipal Airport	249	Feb 20	Mar 21	Nov 23	276
Hat Creek	3,015	May 29	Jun 23	Sep 19	113
Hawthorne Municipal Airport	63	Rare	Rare	Rare	365
Hayfield Pumping Plt	1,370	Feb 20	Mar 20	Nov 30	283
Hayward Air Terminal	43	Jan 2	Jan 27	Dec 25	365
Healdsburg	177	Feb 15	Mar 17	Dec 2	292
Hearst Castle	1,526	Feb 13	Mar 31	Feb 1	365
Hemet	1,811	Jan 10	Feb 25	Dec 23	350
Henshaw Dam	2,700	Apr 18	May 14	Oct 26	189
Hesperia 2E	3,055	Feb 28	Apr 3	Dec 1	270
Hetch Hetchy	3,870	Apr 16	May 12	Nov 12	208
Hollister 2	275	Feb 19	Mar 28	Dec 1	287
Huntington Lake	7,020	Jun 1	Jun 18	Oct 6	129
Idyllwild Fire Dept	5,380	May 16	Jun 5	Oct 24	160
Imperial	-64	Jan 4	Feb 7	Dec 26	360
Imperial Beach Ream Field NAS	24	Rare	Rare	Rare	365
Imperial County Airport	-58	Jan 14	Feb 15	Dec 24	346
Independence	3,950	Mar 31	Apr 23	Nov 9	224
Indio Fire Station	-21	Dec 31	Jan 21	Dec 27	365
Inyokern	2,430	Mar 9	Apr 8	Nov 20	250
Iron Mountain	922	Jan 3	Feb 11	Dec 31	365
Irvine Rch	540	Rare	Rare	Rare	365
Jess Valley	5,400	Jun 14	Jul 3	Sep 18	94
Johnson Valley	3,167	Mar 1	Mar 29	Nov 29	271
Joshua Tree	2,563	Feb 28	Mar 28	Dec 1	273
Julian Cdf	4,215	Mar 27	Apr 30	Dec 1	248
Kentfield	145	Jan 16	Feb 25	Dec 18	334
Kern River Ph 3	2,703	Apr 7	Apr 28	Nov 11	217
Kettleman City	240	Feb 19	Mar 15	Nov 29	281
King City	320	Feb 23	Mar 31	Nov 22	271
Klamath	28	Mar 16	Apr 20	Nov 20	252
Laguna Beach	44	Jan 6	Feb 11	Jan 2	365
Lake Arrowhead	5,205	May 5	May 31	Nov 2	176
Lake Solano	187	Feb 4	Mar 9	Dec 5	304
Lake Spaulding	5,156	May 22	Jun 8	Oct 16	147
Lancaster Wm J Fox Field	2,338	Apr 3	Apr 23	Nov 1	211
Lava Beds Nat Mon	4,770	Jun 6	Jun 22	Sep 28	113
Lee Vining	6,797	May 23	Jun 9	Oct 9	139
Lemon Cove	513	Feb 5	Mar 20	Dec 8	307
Lemoore Reeves NAS	232	Feb 24	Mar 30	Nov 22	265
Lindsay	435	Feb 20	Mar 26	Nov 30	284
Livermore	393	Feb 15	Mar 13	Dec 2	292
Livermore Municipal Airport	393	Feb 27	Mar 29	Dec 1	278
Lodgepole	6,735	Jun 8	Jun 29	Sep 20	100
Lodi	40	Feb 9	Mar 7	Dec 5	301
Lompoc	75	Jan 20	Feb 24	Dec 19	335
Long Beach Daugherty Field	31	Rare	Rare	Rare	365
Loraine 5 NNE	4,235	Apr 22	May 14	Nov 13	201
Los Angeles Dwtn Usc Campus	230	Rare	Rare	Rare	365
Los Angeles Intl Airport	97	Rare	Rare	Rare	365
Los Banos	120	Jan 26	Feb 20	Dec 10	322
Los Banos Det Resv	407	Jan 13	Feb 10	Dec 14	338
Los Gatos	365	Feb 2	Mar 14	Dec 6	310
Madera	270	Feb 18	Mar 18	Nov 27	281
Madera Municipal Airport	253	Feb 12	Mar 17	Nov 30	293
Mammoth Lakes Ranger Station	7,804	Jun 10	Jun 30	Sep 17	98
Manzanita Lake	5,750	Jun 9	Jun 27	Sep 21	102
Markley Cove	480	Mar 6	Apr 6	Nov 30	266
Martinez Wtp	40	Feb 28	Apr 5	Nov 22	266
Marysville	57	Jan 15	Feb 18	Dec 12	333
Marysville Yuba County Airport	62	Feb 11	Mar 12	Nov 30	289
McCloud	3,233	May 28	Jun 15	Sep 30	123
Mecca Fire Station	-183	Jan 6	Feb 4	Dec 22	352
Merced	154	Mar 3	Apr 10	Nov 24	263
Merced 23 WSW	78	Mar 28	Apr 27	Nov 14	233
Merced Municipal Airport	152	Feb 26	Apr 1	Nov 25	273
Mineral	4,875	Jun 10	Jun 28	Sep 13	96
Mitchell Caverns	4,350	Mar 6	Apr 9	Dec 8	272
Modesto City County Airport	73	Jan 31	Feb 25	Dec 5	312
Moffett Federal Airfield	39	Jan 6	Feb 4	Dec 23	353
Mojave	2,735	Mar 15	Apr 17	Nov 17	241
Montague Siskiyou County Airport	2,635	May 12	Jun 1	Oct 8	148
Monterey	260	Jan 1	Jan 21	Dec 30	365
Monterey Peninsul Airport	165	Jan 2	Jan 20	Dec 23	363
Monterey WFO	122	Jan 3	Jan 24	Dec 28	365
Morongo Valley N	3,145	Feb 25	Apr 3	Dec 15	297
Morro Bay Fire Dept	118	Jan 19	Feb 9	Jan 14	365
Mount Diablo Junction	2,170	Mar 8	Apr 15	Dec 22	282
Mount Hamilton	4,206	May 3	Jun 5	Nov 18	197
Mount Laguna #3	5,920	Apr 22	May 21	Nov 8	197
Mount Shasta	3,613	May 15	Jun 5	Oct 6	143
Mount Shasta	3,535	May 6	May 28	Oct 12	158
Mount Wilson Cbs	5,710	Apr 28	May 27	Nov 15	199
N Fk Ranger Station	2,645	Apr 24	May 14	Nov 4	192
Napa County Airport	14	Mar 5	Apr 16	Nov 21	256
Napa State Hospital	35	Feb 12	Mar 13	Dec 4	299
Needles Airport	890	Jan 6	Feb 10	Jan 2	365
Nevada City	2,781	Apr 14	May 7	Nov 20	218
New Cuyama Fire Station	2,160	Apr 15	May 3	Nov 4	201
New Melones Dam HQ	960	Feb 20	Apr 7	Dec 11	290
Newark	10	Jan 1	Jan 22	Dec 27	365
Newhall 5NW	1,765	Jan 8	Mar 10	Jan 1	365
Newman	90	Feb 26	Apr 21	Nov 29	273
Newport Beach Harbor	10	Rare	Rare	Rare	365
North Island NAS	26	Rare	Rare	Rare	365
Northridge Cal State	904	Jan 2	Jan 27	Jan 1	365
Oakland Metro Intl Airport	6	Jan 7	Feb 8	Dec 23	356
Oakland Museum	30	Rare	Rare	Rare	365
Occidental	865	Jan 29	Mar 17	Dec 30	347
Oceanside Marina	10	Rare	Rare	Rare	365
Oceanside Municipal Airport	28	Jan 23	Feb 22	Dec 11	325
Ocotillo Wells 2W	390	Jan 7	Feb 7	Jan 4	365
Ojai	745	Mar 21	Apr 15	Nov 15	235
Ontario Intl Airport	949	Jan 4	Feb 7	Dec 30	365
Orick Prairie Creek Park	160	Apr 12	May 5	Nov 6	209
Orland	254	Feb 25	Apr 6	Dec 2	279
Orleans	403	Mar 12	Apr 9	Nov 26	262
Oroville	171	Jan 30	Mar 3	Dec 13	321
Oroville Municipal Airport	190	Jan 29	Feb 28	Dec 7	317
Oxnard	49	Rare	Rare	Rare	365
Oxnard Ventura County Airport	36	Rare	Rare	Rare	365
Oxnard WFO	52	Rare	Rare	Rare	365
Pacific House	3,450	Apr 26	May 19	Nov 2	191
Pacifica 4 SSE	475	Jan 11	Feb 12	Jan 10	365
Paicines 4 W	905	Apr 14	May 9	Nov 2	201
Palm Springs	425	Jan 1	Jan 18	Dec 31	365
Palm Springs Regional Airport	421	Jan 9	Jan 29	Jan 9	365
Palmdale	2,612	Mar 10	Apr 11	Nov 19	248
Palmdale Airport	2,524	Mar 18	Apr 11	Nov 15	241
Palo Alto	25	Feb 1	Mar 4	Dec 7	310
Palomar Mountain Obsy	5,550	Apr 29	May 29	Nov 18	201
Paradise	1,750	Feb 7	Apr 1	Dec 18	313
Parker Resrvoir	738	Jan 7	Feb 6	Dec 31	365
Pasadena	864	Jan 8	Feb 17	Jan 7	365
Paso Robles	730	Mar 15	Apr 13	Nov 10	238
Paso Robles Municipal Airport	810	Apr 4	Apr 27	Nov 5	213
Pearblossom	3,101	Mar 13	Apr 17	Dec 1	258
Petaluma Airport	20	Feb 28	Apr 6	Nov 25	271
Pinnacles National Monument	1,307	Apr 23	Jun 4	Nov 3	189
Pismo Beach	39	Feb 1	Mar 13	Jan 4	362
Placerville	1,850	Mar 31	Apr 23	Nov 21	237
Point Mugu Nf	13	Dec 29	Jan 15	Dec 24	365
Pomona/fairplex	999	Jan 8	Feb 18	Dec 28	354
Porterville	393	Jan 20	Feb 22	Dec 13	330
Portola	4,850	Jun 11	Jul 2	Sep 10	91
Potter Valley Powerhouse	1,018	Apr 8	Apr 29	Nov 6	211
Priest Valley	2,300	May 8	May 29	Oct 22	165
Quincy	3,420	May 22	Jun 14	Sep 25	122
Ramona Airport	1,393	Mar 19	Apr 10	Nov 23	248
Ramona Fire Dept	1,470	Mar 4	Apr 10	Dec 4	270
Rancho Bernardo	690	Jan 5	Feb 1	Jan 2	365
Randsburg	3,570	Mar 19	Apr 13	Nov 25	251
Red Bluff Municipal Airport	353	Feb 22	Mar 30	Nov 29	281
Redding 12 WNW	1,418	Mar 19	Apr 11	Nov 22	250
Redding Municipal Airport	497	Mar 3	Apr 9	Nov 21	261
Redlands	1,410	Jan 27	Feb 28	Dec 19	329
Redondo Beach	142	Rare	Rare	Rare	365
Redwood City	31	Jan 17	Feb 16	Dec 12	333
Richardson Gr State Park	503	Mar 10	Apr 13	Dec 1	271
Richmond	20	Jan 4	Jan 26	Jan 2	365
Riverside Citrus Experiment	986	Jan 10	Feb 17	Jan 2	365
Riverside Fire Station 3	840	Jan 9	Feb 25	Dec 25	353
Riverside Municipal Airport	805	Jan 9	Feb 21	Dec 30	362
S Lake Fs	2,654	Apr 5	Apr 21	Nov 3	212
Sacramento 5 ESE	38	Jan 12	Feb 8	Dec 16	341
Sacramento Executive Airport	15	Feb 2	Mar 5	Dec 2	301
Sacramento Metro Airport	23	Feb 22	Apr 1	Nov 24	277
Sagehen Creek	6,337	Any month	Any month	Any month	22
Saint Helena	225	Feb 3	Mar 13	Dec 4	306
Salinas #2	45	Feb 4	Mar 11	Dec 6	311
Salinas Municipal Airport	74	Jan 29	Mar 1	Dec 10	325
San Diego Brown Field	515	Jan 6	Feb 5	Dec 31	365
San Diego Lindbergh Field	15	Rare	Rare	Rare	365
San Diego Miramar NAS	477	Rare	Rare	Rare	365
San Diego Montgomery Field	417	Rare	Rare	Rare	365
San Diego Seaworld	14	Rare	Rare	Rare	365
San Francisco Dwtn	150	Rare	Rare	Rare	365
San Francisco Intl Airport	8	Dec 29	Jan 13	Dec 26	365
San Francisco Oceanside	8	Dec 30	Mar 13	Dec 25	365
San Gabriel Fire Dept	363	Jan 4	Jan 28	Jan 2	365
San Gregorio 2 SE	275	Mar 2	Apr 15	Nov 25	268
San Jacinto	1,525	Jan 31	Feb 28	Dec 10	315
San Jose	67	Jan 2	Jan 23	Dec 25	362
San Jose	51	Jan 12	Feb 14	Dec 22	347
San Luis Dam	277	Jan 27	Feb 22	Dec 11	323
San Luis Obispo Airport	200	Jan 31	Mar 7	Dec 11	319
San Luis Obispo Poly	308	Jan 16	Feb 26	Dec 25	349
San Pasqual Animal Park	420	Feb 2	Mar 4	Dec 7	309
San Rafael Civic Center	120	Jan 11	Feb 25	Dec 21	349
Sandberg	4,510	Apr 15	May 9	Nov 26	224
Santa Ana Fire Station	135	Rare	Rare	Rare	365
Santa Ana John Wayne Airport	54	Rare	Rare	Rare	365
Santa Barbara	16	Jan 13	Feb 24	Jan 6	365
Santa Barbara 11 W	18	Dec 31	Jan 29	Dec 20	365
Santa Barbara Municipal Airport	9	Jan 11	Feb 13	Dec 16	342
Santa Cruz	70	Jan 29	Feb 28	Dec 13	323
Santa Maria Public Airport	242	Feb 4	Mar 16	Dec 13	315
Santa Monica Municipal Airport	174	Rare	Rare	Rare	365
Santa Monica Pier	14	Rare	Rare	Rare	365
Santa Rosa	166	Feb 25	Mar 29	Dec 1	279
Santa Rosa Sonoma County Airport	114	Mar 2	Apr 2	Nov 20	262
Scotia	136	Feb 1	Mar 8	Dec 19	328
Shafter 6E	404	Feb 20	Mar 9	Nov 23	276
Shasta Dam	1,075	Feb 8	Mar 28	Dec 28	322
Shelter Cove Aviation	246	Rare	Rare	Rare	365
Skyline Ridge Preserve	2,270	Mar 21	Apr 28	Dec 15	275
So Entrance Yosemite National Park	5,047	May 24	Jun 11	Oct 10	137
Sonoma	97	Mar 2	Apr 5	Nov 27	270
Sonora	1,675	Apr 9	Apr 30	Nov 9	213
South Lake Tahoe Airport	6,314	Any month	Any month	Any month	63
Stockton Fire Station 4	12	Feb 5	Mar 11	Dec 8	305
Stockton Metro Airport	26	Feb 6	Feb 28	Dec 1	304
Stony Gorge Rsvr	800	Apr 5	Apr 24	Nov 13	220
Stovepipe Wells 1 SW	84	Jan 4	Jan 23	Dec 22	352
Strawberry Valley	3,808	May 4	May 31	Oct 30	174
Susanville 2SW	4,212	May 16	Jun 5	Oct 8	143
Sutter Hill Cdf	1,586	Mar 4	Apr 8	Dec 11	285
Taft	773	Jan 24	Mar 12	Dec 17	330
Tahoe City	6,230	Jun 9	Jun 25	Sep 25	108
Tahoma	6,315	Jun 4	Jun 20	Oct 3	120
Tehachapi 4 SE	4,220	Apr 28	May 21	Oct 26	183
Three Rivers Edison Ph 1	1,140	Mar 16	Apr 14	Nov 26	249
Torrance Airport	90	Jan 9	Feb 24	Jan 5	365
Tracy Carbona	135	Feb 25	Apr 6	Nov 26	272
Tracy Pumping Plt	61	Jan 19	Feb 17	Dec 10	330
Trinity River Hatchery	1,861	Apr 23	May 11	Oct 22	178
Trona	1,695	Feb 15	Mar 4	Nov 28	285
Truckee Ranger Station	5,823	Any month	Any month	Any month	59
Truckee-tahoe Airport	5,900	Any month	Any month	Any month	48
Tulelake	4,038	Jun 6	Jun 23	Sep 14	97
Tuolumne Meadows Ranger Station	8,694	Any month	Any month	Any month	30
Turlock #2	103	Jan 6	Jan 31	Dec 20	351
Tustin Irvine Rch	235	Jan 5	Feb 2	Dec 25	365
Twentynine Palms	1,975	Jan 24	Feb 22	Dec 10	321
Twitchell Dam	582	Feb 4	Mar 31	Dec 4	301
U C L A	430	Rare	Rare	Rare	365
Ukiah	636	Mar 19	Apr 15	Nov 20	245
Ukiah Municipal Airport	601	Mar 5	Apr 7	Nov 21	259
Vacaville	110	Jan 31	Mar 11	Dec 11	318
Vacaville Nut Tree Airport	109	Feb 18	Mar 25	Nov 28	283
Vallejo	341	Jan 17	Mar 4	Dec 27	346
Valley Center 1N	1,290	Feb 19	Mar 31	Dec 1	281
Van Nuys Airport	770	Dec 31	Jan 27	Dec 30	365
Verdi 2W	5,429	May 9	Jun 2	Oct 17	156
Victorville	2,880	Mar 18	Apr 12	Nov 11	233
Visalia	303	Jan 23	Feb 27	Dec 13	328
Vista	430	Jan 30	Mar 16	Jan 7	365
Wasco	291	Jan 31	Feb 27	Dec 5	315
Watsonville Municipal Airport	160	Jan 31	Mar 9	Dec 9	317
Watsonville Wtr Wks	95	Jan 28	Mar 3	Dec 13	324
Weaverville	2,058	May 3	May 27	Oct 11	159
Whiskeytown Rsvr	1,295	Feb 13	Mar 25	Dec 13	304
Willits 1 NE	1,353	May 5	May 31	Oct 9	157
Willows 6 W	234	Feb 21	Apr 9	Dec 6	289
Winters	135	Feb 18	Mar 14	Nov 30	284
Woodland 1 WNW	67	Feb 7	Mar 11	Dec 5	301
Woodland Hills Pierce College	790	Jan 24	Mar 5	Dec 15	329
Woodside Fire Station 1	380	Feb 25	Apr 11	Nov 25	274
Wrightwood	6,000	May 16	Jun 9	Oct 13	151
Yosemite Park HQ	4,018	Apr 21	May 13	Oct 27	186
Yosemite Village 12 W	6,620	May 12	Jun 4	Nov 1	171
Yreka	2,709	Apr 30	May 20	Oct 18	169
Yucca Mesa	3,445	Feb 16	Mar 24	Dec 10	296
Yucca Valley	3,249	Mar 14	Apr 1	Nov 28	255

Frequently asked questions

When is the last frost in California?

The median last spring frost (32°F) across California's NOAA weather stations is February 23, based on 1991–2020 climate normals. It ranges from December 29 at Point Mugu Nf to June 14 at Jess Valley. For a safer planting date, use the 10%-risk date; the state median for that is March 31.

When is the first frost in California?

The median first fall frost across California's stations is December 1. The earliest median first frost is September 10 at Portola, and the latest is February 1 at Hearst Castle.

How long is the growing season in California?

The median frost-free season is 281 days across California's stations, from 91 days at Portola to 365 days at Vista.

When should I plant tomatoes in California?

Plant tomatoes outdoors after your local last frost, ideally after the 10%-risk date when nights stay above 50°F. At a typical California station that means starting seeds indoors 6–8 weeks before February 23 and transplanting from about March 31. Check your ZIP code, because dates vary by weeks across the state.

Does it frost everywhere in California?

No. At 32 stations in California, 32°F nights were too rare in 1991–2020 to compute an average frost date, so those places are frost-free in most years.

Can it frost in summer in California?

Yes, at 9 stations in California a 32°F night is possible in any month, mostly at high elevation or far north. There is no reliable frost-free season there; use cold-hardy crops and row covers.

How to use these dates

Frost dates are 30-year averages from NOAA, not forecasts. Use them to plan seed starting and planting, then watch the 10-day forecast as the date approaches. Cold air settles in valleys and low spots, so a garden at the bottom of a slope can frost a week or more later in spring than the nearest station shows.

Ready to plan? The planting calendar by ZIP code turns these dates into start-indoors, transplant and sowing dates for 30 crops.

Sources and method

Dates are the 32°F freeze probabilities published in the NOAA NCEI 1991–2020 U.S. Climate Normals for each station. Station names are NOAA's, lightly expanded for readability. See the methodology or download the full table.