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Frost Date Finder

NOAA 1991–2020 freeze normals

Frost Dates in Utah

Last and first frost at the 67 NOAA stations behind this site's Utah pages.

At the middle station of the 67 in Utah where a freeze comes every year, the last spring frost (50%) is May 5 and the first fall frost October 10, a freeze-free season of 156 days. The last frost is earliest at St George (St George, UT, March 14) and latest at Parowan (Brian Head, UT, June 21), 99 days apart. The season runs from 82 days at Parowan to 239 at St George.

45 of these stations were also in NOAA's previous normals, for 1981–2010. Between the two, the median station's freeze-free season grew 2 days longer, with the last spring frost 3 days earlier; the season lengthened at 27 stations and shortened at 17. The two periods share twenty years, so the change reflects mostly 2011–2020 against 1981–1990.

Utah places by frost date

Frost dates of the Utah places with a page, largest first
PlaceZIPLast frostFirst frostSeasonWinters with 32°F
Lehi84043April 30October 9159 d100%
Herriman84096April 18October 22185 d100%
Clearfield84015April 22October 22180 d100%
Ogden84404April 22October 18177 d100%
Tooele84074May 2October 16165 d100%
American Fork84003April 17October 25188 d100%
Layton84041April 29October 20172 d100%
St George84790March 14November 10239 d100%
West Valley City84119April 8October 31204 d100%
Logan84321April 30October 16166 d100%
Spanish Fork84660April 25October 18174 d100%
Ogden84401April 21October 23184 d100%
Bountiful84010April 25October 24181 d100%
Provo84604April 18October 21185 d100%
Kaysville84037April 19October 19181 d100%
Salt Lake City84121April 29October 22174 d100%
Taylorsville84129March 31November 8224 d100%
Orem84057April 19October 19182 d100%
Taylorsville84123April 25October 18175 d100%
North Ogden84414April 19October 22186 d100%
Vernal84078May 7October 6150 d100%
Cedar City84721May 9October 11155 d100%
Payson84651May 4October 11157 d100%
Magna84044April 3November 4213 d100%
Brigham City84302May 5October 5150 d100%
Logan84341May 8October 2144 d100%
Heber City84032June 4September 20106 d100%
Cedar City84720May 21September 29130 d100%
Hurricane84737April 1November 5217 d100%
North Salt Lake84054April 24October 19178 d100%
Park City84098May 29September 25117 d100%
Tremonton84337April 24October 17175 d100%
Roosevelt84066May 23September 22121 d100%
Grantsville84029May 2October 14164 d100%
Price84501May 3October 12160 d100%
Morgan84050May 25September 24119 d100%
Moab84532April 11October 23192 d100%
Hyrum84319May 12September 28138 d100%
Alpine84004May 3October 12159 d100%
Kamas84036June 5September 17100 d100%
Richfield84701May 21September 24125 d100%
Nephi84648May 6October 10156 d100%
Midway84049May 31September 11101 d100%
Ephraim84627May 28September 20113 d100%
Kanab84741April 19October 23186 d100%
Delta84624May 16September 29137 d100%
Eden84310May 25September 26123 d100%
Mt Pleasant84647May 26September 25119 d100%
Coalville84017June 7September 1295 d100%
Beaver84713June 1September 28120 d100%
Helper84526June 15September 1287 d100%
Monroe84754June 6September 21104 d100%
Blanding84511April 28October 21174 d100%
Gunnison84634May 31September 21114 d100%
Manti84642May 11October 6146 d100%
Fairview84629June 13September 1794 d100%
Duchesne84021May 6October 5150 d100%
Parowan84761June 21September 1282 d100%
Richmond84333May 11October 5143 d100%
Fillmore84631May 4October 14160 d100%
Huntington84528May 18September 27128 d100%
Huntsville84317June 4September 16102 d100%
Lewiston84320May 17September 18121 d100%
Monticello84535May 19October 2133 d100%
Salina84654May 29September 26118 d100%
Montezuma Creek84534April 24October 13172 d100%
Panguitch84759June 12September 1290 d100%

50% dates from NOAA NCEI U.S. Climate Normals 1991–2020, one row per station; a state page is published when at least 5 stations stand behind its pages. Where a freeze comes in fewer than nine winters in ten, the dates describe the winters that have one.