Utah Frost Dates: Last and First Frost by Town

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

Quick answer

Across Utah's 169 NOAA stations with regular frost, the median last spring frost is May 11 and the median first fall frost is October 5. Last frost dates range from March 9 at Hite Ranger Station to June 21 at Brian Head, so enter your ZIP code below for the station nearest you.

How frost dates vary across Utah

Elevation matters: across Utah's stations, each 1,000 ft of elevation delays the median last frost by about 11 days.
Safety margin: the median 10%-risk date (May 31) is about 20 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 dates at Utah's major weather stations

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


Brigham City 28 WNW	4,951	May 12	Jun 8	Oct 5	144
Bryce Canyon Airport	7,586	Any month	Any month	Any month	80
Cedar City Municipal Airport	5,586	May 21	Jun 8	Sep 29	130
Coalville	5,550	Jun 7	Jun 25	Sep 12	95
Delta	4,620	May 16	Jun 5	Sep 29	137
Granite Peak Dugway Pg	4,300	Apr 18	May 5	Oct 16	179
Hanksville	4,308	May 5	May 23	Oct 3	149
Logan Cache Airport	4,454	May 8	May 29	Oct 2	144
Milford Municipal Airport	5,040	May 13	Jun 2	Oct 4	143
Moab Canyonland Airport	4,561	Apr 22	May 8	Oct 20	179
Modena	5,460	May 20	Jun 6	Oct 3	136
Ogden Hinkley Airport	4,470	Apr 22	May 10	Oct 22	180
Price Carbon County Airport	5,921	May 3	May 21	Oct 12	160
Salt Lake City Intl Airport	4,225	Apr 8	Apr 30	Oct 31	204
Torrey 7 E	6,204	Apr 22	May 9	Oct 23	183
Vernal Municipal Airport	5,260	May 6	May 25	Oct 7	153
Wendover Airport Awos	4,237	Apr 18	May 5	Oct 23	188

All 174 stations in Utah

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


Alpine	5,100	May 3	May 26	Oct 12	159
Alta	8,710	Jun 11	Jun 27	Sep 18	98
Altamont	6,456	May 31	Jun 16	Sep 23	112
Alton	7,098	Jun 1	Jun 15	Sep 30	120
Angle	6,410	Jun 17	Jul 3	Sep 12	85
Arches National Park Hqs	4,093	Apr 2	Apr 23	Oct 30	207
Bear Lake State Park	5,928	May 15	Jun 5	Oct 4	140
Beaver Canyon Pwr House	7,275	Jun 1	Jun 15	Sep 28	120
Big Water	4,100	Apr 8	Apr 28	Nov 1	204
Black Rock	4,916	May 23	Jun 11	Sep 27	124
Blanding	6,032	Apr 28	May 16	Oct 21	174
Blowhard Mountain Radar	10,694	Jun 7	Jun 22	Sep 29	110
Bluff	4,319	Apr 24	May 9	Oct 13	172
Boulder	6,650	May 4	May 25	Oct 14	160
Bountiful Bench	4,950	Apr 25	May 14	Oct 24	181
Bountiful-val Verda	4,540	Apr 24	May 14	Oct 19	178
Brian Head	9,770	Jun 21	Jul 6	Sep 12	82
Brigham City 28 WNW	4,951	May 12	Jun 8	Oct 5	144
Brigham City Waste Plt	4,240	May 5	May 29	Oct 5	150
Bryce Canyon Airport	7,586	Any month	Any month	Any month	80
Bryce Canyon National Park Hqrs	7,890	May 23	Jun 9	Sep 27	125
Bullfrog Basin	3,822	Mar 25	Apr 12	Nov 10	227
Callao	4,342	May 14	Jun 4	Sep 28	135
Canyonlands-the Neck	5,871	Apr 25	May 13	Oct 23	180
Canyonlands-the Needles	4,906	Apr 30	May 16	Oct 11	164
Capitol Reef National Park	5,500	Apr 18	May 3	Oct 28	192
Castle Dale	5,629	May 18	Jun 8	Sep 27	128
Castle Valley	4,725	Apr 17	May 3	Oct 23	185
Castle Valley 1SE	4,905	Apr 19	May 3	Oct 21	184
Cedar Breaks National Monument	10,372	Jun 11	Jun 27	Oct 3	113
Cedar City	6,090	May 4	May 28	Oct 13	159
Cedar City 5E	6,465	May 23	Jun 8	Oct 4	130
Cedar City Municipal Airport	5,586	May 21	Jun 8	Sep 29	130
Cedar Point	6,760	May 16	Jun 2	Oct 11	145
Circleville	6,050	May 23	Jun 13	Sep 27	125
City Creek Wtp	5,340	May 13	May 31	Oct 7	146
Coalville	5,550	Jun 7	Jun 25	Sep 12	95
Coalville 13 E	6,510	Any month	Any month	Any month	51
Cottonwood Weir	4,986	Apr 29	May 30	Oct 22	174
Cutler Dam	4,290	May 3	May 24	Oct 12	160
Deer Creek Dam	5,270	May 28	Jun 15	Sep 23	119
Delta	4,620	May 16	Jun 5	Sep 29	137
Deseret	4,590	May 14	May 31	Sep 30	137
Dewey	4,120	Apr 27	May 9	Oct 9	165
Dinosaur Nm-quarry Area	4,802	May 1	May 23	Oct 6	156
Draper-point Of Mountain	4,506	Apr 18	May 6	Oct 22	185
Duchesne	5,551	May 6	May 26	Oct 5	150
Dugway	4,345	May 11	May 29	Oct 2	143
Echo Dam	5,470	May 30	Jun 16	Sep 18	112
Eden-liberty	5,195	May 25	Jun 16	Sep 26	123
Electric Lake	8,380	Any month	Any month	Any month	61
Enterprise	5,320	May 21	Jun 7	Oct 2	132
Enterprise Beryl Junction	5,150	May 31	Jun 20	Sep 20	110
Ephraim	5,498	May 28	Jun 15	Sep 20	113
Escalante	5,810	May 8	May 24	Oct 10	155
Eskdale	4,980	May 12	Jun 3	Oct 1	140
Fairfield	4,880	Jun 2	Jun 24	Sep 16	103
Farmington 3 NW	4,380	Apr 19	May 7	Oct 19	181
Ferron	5,923	May 6	May 27	Oct 10	156
Fillmore	5,127	May 4	May 26	Oct 14	160
Fish Springs NWR	4,357	Apr 26	May 17	Oct 14	169
Flaming Gorge	6,244	May 26	Jun 10	Sep 23	120
Fort Duchesne	5,052	May 19	Jun 15	Oct 2	135
Fremont Indian State Park	5,920	Jun 4	Jun 21	Sep 21	106
Garfield	4,298	Apr 3	Apr 19	Nov 4	213
Goblin Valley State Park	4,960	Apr 26	May 10	Oct 18	173
Granite Peak Dugway Pg	4,300	Apr 18	May 5	Oct 16	179
Grantsville 2W	4,550	May 2	May 19	Oct 14	164
Grouse Creek	5,320	Jun 4	Jun 22	Sep 17	104
Hanksville	4,308	May 5	May 23	Oct 3	149
Hans Flat Ranger Station	6,600	May 1	May 24	Oct 16	163
Hatch	6,893	Jun 19	Jul 2	Sep 13	83
Heber	5,590	Jun 4	Jun 21	Sep 20	106
Hite Ranger Station	3,850	Mar 9	Apr 5	Nov 20	253
Hovenweep National Monument	5,240	May 2	May 21	Oct 10	159
Huntsville Monastery	5,140	Jun 4	Jun 22	Sep 16	102
Ibapah	5,279	Jun 14	Jul 1	Sep 8	86
Jarvie Rch	5,454	May 19	Jun 4	Sep 28	132
Jensen	4,736	May 20	Jun 5	Sep 25	126
Johnson Pass	5,580	May 15	Jun 4	Oct 5	142
Kamas	6,481	Jun 5	Jun 23	Sep 17	100
Kanab	4,900	Apr 29	May 18	Oct 22	175
Kanosh	4,382	Apr 30	May 21	Oct 19	172
Kodachrome Basin Park	5,805	May 31	Jun 18	Sep 28	116
Koosharem	6,930	Jun 6	Jun 26	Sep 21	104
La Sal 1SW	6,787	May 17	Jun 5	Oct 6	141
La Verkin	3,194	Apr 1	Apr 24	Nov 5	217
Laketown	5,980	May 28	Jun 17	Sep 24	119
Levan	5,298	May 10	May 31	Oct 7	148
Little Sahara Rec Area	5,230	May 15	Jun 5	Oct 1	137
Loa	7,070	May 31	Jun 14	Sep 21	112
Logan 5 SW Experiment Farm	4,488	May 12	May 29	Sep 28	138
Logan Cache Airport	4,454	May 8	May 29	Oct 2	144
Logan Radio Kvnu	4,475	May 8	Jun 2	Oct 2	145
Logan Utah St University	4,790	Apr 30	May 19	Oct 16	166
Lytle Rch	2,787	Mar 18	Apr 16	Nov 9	234
Maeser 9NW	6,448	May 15	Jun 7	Oct 5	143
Manila	6,393	May 22	Jun 11	Sep 29	128
Manti	5,740	May 11	Jun 1	Oct 6	146
Manti Radio Kmti	5,498	May 31	Jun 16	Sep 21	114
Marysvale	5,845	May 24	Jun 10	Sep 25	123
Mexican Hat	4,109	Apr 11	Apr 26	Oct 30	201
Milford	5,009	May 10	Jun 1	Oct 2	144
Milford Municipal Airport	5,040	May 13	Jun 2	Oct 4	143
Moab	4,053	Apr 11	Apr 28	Oct 23	192
Moab Canyonland Airport	4,561	Apr 22	May 8	Oct 20	179
Modena	5,460	May 20	Jun 6	Oct 3	136
Monticello #2	7,086	May 17	Jun 4	Oct 7	141
Monticello 2E	6,820	May 19	Jun 6	Oct 2	133
Moon Lake	8,125	Jun 11	Jun 24	Sep 18	97
Morgan	5,100	May 25	Jun 13	Sep 24	119
Moroni	5,580	May 26	Jun 13	Sep 25	119
Mountain Dell Dam	5,420	May 7	May 27	Oct 14	158
Myton	5,085	May 7	May 25	Oct 5	149
Natural Bridges National Monument	6,508	May 5	May 27	Oct 13	157
Neola	5,950	May 19	Jun 7	Sep 29	130
Nephi	5,146	May 6	May 24	Oct 10	156
New Harmony	5,167	May 9	May 29	Oct 11	155
Oak City	5,095	May 2	May 21	Oct 13	162
Ogden Hinkley Airport	4,470	Apr 22	May 10	Oct 22	180
Ogden NE Bench	4,572	Apr 19	May 4	Oct 22	186
Ogden Pioneer Ph	4,350	Apr 21	May 6	Oct 23	184
Ogden Sugar Factory	4,280	Apr 22	May 9	Oct 18	177
Orderville	5,460	May 15	Jun 4	Oct 8	144
Orem Trtmt Plt	4,510	Apr 19	May 9	Oct 19	182
Ouray 4NE	4,674	May 2	May 16	Oct 3	152
Panguitch	6,647	Jun 12	Jun 27	Sep 12	90
Paria Ranger Station	4,426	Apr 19	May 9	Oct 23	186
Park City	6,900	May 29	Jun 14	Sep 25	117
Partoun	4,780	May 13	Jun 5	Sep 29	137
Pineview Dam	4,940	May 22	Jun 8	Sep 26	125
Pleasant Grove	4,692	Apr 17	May 7	Oct 25	188
Price Carbon County Airport	5,921	May 3	May 21	Oct 12	160
Provo Byu	4,570	Apr 18	May 5	Oct 21	185
Randolph	6,290	Jun 14	Jun 30	Sep 1	76
Richfield Radio Ksvc	5,285	May 21	Jun 7	Sep 24	125
Richmond	4,680	May 11	Jun 2	Oct 5	143
Roosevelt Radio	5,014	May 23	Jun 9	Sep 22	121
Rosette	5,685	May 21	Jun 11	Oct 2	132
Salina 24 E	7,560	May 29	Jun 15	Sep 26	118
Salt Lake City E Bench	4,850	Apr 25	May 10	Oct 18	175
Salt Lake City Intl Airport	4,225	Apr 8	Apr 30	Oct 31	204
Salt Lake Triad Center	4,280	Mar 31	Apr 19	Nov 8	224
Santaquin Chlorinator	5,160	May 4	May 28	Oct 11	157
Scipio	5,314	May 22	Jun 10	Sep 25	122
Scofield Dam	7,630	Jun 15	Jul 1	Sep 12	87
Scofield-skyline Mine	8,697	Jun 13	Jun 30	Sep 17	94
Silver Lake Brighton	8,740	Any month	Any month	Any month	79
Snake Creek Powerhouse	6,010	May 31	Jun 23	Sep 11	101
Spanish Fk Pwr House	4,720	Apr 25	May 13	Oct 18	174
St George	2,857	Mar 14	Apr 6	Nov 10	239
Sundance	6,620	May 17	Jun 8	Oct 5	138
Sunnyside City	6,511	Apr 26	May 18	Oct 25	181
Sunnyside City Center	6,530	May 5	May 26	Oct 15	159
Thiokol Propulsion F S	4,600	May 17	Jun 8	Sep 24	128
Timpanogos Cave	5,740	May 2	May 26	Oct 16	161
Tooele	4,944	May 2	May 28	Oct 16	165
Torrey 7 E	6,204	Apr 22	May 9	Oct 23	183
Tremonton	4,310	Apr 24	May 9	Oct 17	175
Trenton	4,455	May 17	Jun 6	Sep 18	121
Utah Lake Lehi	4,505	Apr 30	May 27	Oct 9	159
Utah Test Range	4,440	May 15	Jun 4	Oct 2	139
Valley Of The Gods	5,287	Mar 29	Apr 15	Nov 6	223
Vernal	5,345	May 7	May 28	Oct 6	150
Vernal Municipal Airport	5,260	May 6	May 25	Oct 7	153
Vernon	5,471	Jun 1	Jun 19	Sep 20	110
Veyo Powerhouse	4,600	Apr 9	Apr 28	Nov 5	207
Wah Wah Rch	4,880	May 19	Jun 11	Sep 29	131
Wanship Dam	5,940	Jun 11	Jun 30	Sep 12	92
Weber Basin Pump Plt 3	4,900	Apr 29	May 25	Oct 20	172
Wellington 3 E	5,400	May 27	Jun 11	Sep 26	122
Wendover Airport Awos	4,237	Apr 18	May 5	Oct 23	188
Woodruff	6,315	Any month	Any month	Any month	59
Zion National Park	4,038	Apr 13	May 2	Nov 2	202

Frequently asked questions

When is the last frost in Utah?

The median last spring frost (32°F) across Utah's NOAA weather stations is May 11, based on 1991–2020 climate normals. It ranges from March 9 at Hite Ranger Station to June 21 at Brian Head. For a safer planting date, use the 10%-risk date; the state median for that is May 31.

When is the first frost in Utah?

The median first fall frost across Utah's stations is October 5. The earliest median first frost is September 1 at Randolph, and the latest is November 20 at Hite Ranger Station.

How long is the growing season in Utah?

The median frost-free season is 144 days across Utah's stations, from 76 days at Randolph to 253 days at Hite Ranger Station.

When should I plant tomatoes in Utah?

Plant tomatoes outdoors after your local last frost, ideally after the 10%-risk date when nights stay above 50°F. At a typical Utah station that means starting seeds indoors 6–8 weeks before May 11 and transplanting from about May 31. Check your ZIP code, because dates vary by weeks across the state.

Can it frost in summer in Utah?

Yes, at 5 stations in Utah 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.