Colorado climate

Colorado Frost Dates

The median last spring freeze and first fall freeze (32°F) at 210 NOAA stations in Colorado, 1991-2020, with the growing season between them.

Every station

A median date has an even chance of a later freeze in spring or an earlier one in fall. Each town page gives the dates at 36, 32 and 28°F and every probability from 10 to 90 percent.

StationElevationLast freezeFirst freezeSeason, daysTown page
Akron 4 E4,542 ftMay 8October 6151Akron
Akron Washington CO AP4,663 ftMay 6October 8155Akron
Alamosa 1E7,540 ftMay 30September 17110Alamosa
Alamosa San Luis AP7,534 ftJune 7September 15100Alamosa
Allenspark 3NW8,500 ftJune 14September 1290Allenspark
Altenbern5,637 ftMay 25September 25123Parachute
Arapahoe 12S4,065 ftMay 5October 9157Cheyenne Wells
Arapahoe 14N4,142 ftMay 9October 7151Cheyenne Wells
Aspen 1SW8,175 ftJune 2September 23113Aspen
Aspen Pitkin CO AP7,721 ftMay 31September 23115Aspen
Bailey7,752 ftJune 16September 884Bailey
Black Canyon Of The Gunnison8,151 ftMay 23October 1131Montrose
Black Forest 6WNW6,957 ftMay 11October 6148Gleneagle
Blanca 4 Nw7,709 ftMay 25September 22120Alamosa East
Blue Mesa Lake7,568 ftJune 9September 1699Gunnison
Bonny Dam 2NE3,717 ftMay 5October 10158
Boulder5,484 ftMay 6October 5152Boulder
Boulder 14 W9,829 ftJune 21September 273Nederland
Briggsdale4,862 ftMay 12September 28139Kersey
Brighton 3 Se5,016 ftMay 3October 7157Brighton
Buckhorn Mtn 1 E7,400 ftMay 21September 29131Laporte
Buena Vista 2S7,954 ftMay 27September 23119Buena Vista
Burlington4,162 ftMay 6October 9156Burlington
Burlington Carson AP4,192 ftMay 2October 10161Burlington
Byers 5 Ene5,101 ftMay 13October 2142Byers
Cabin Creek10,021 ftJune 6September 19105Georgetown
Campo 7 S4,105 ftApril 29October 13167
Canon City5,378 ftMay 4October 7156Cañon City
Castle Rock6,185 ftMay 9October 2146Castle Pines
Cedaredge 3E6,838 ftMay 3October 9159Cedaredge
Center 4 Ssw7,673 ftMay 24September 24123Center
Cheesman6,880 ftMay 17October 1137Perry Park
Cheraw 1 N4,147 ftApril 30October 10163North La Junta
Cherry Creek Dam5,647 ftMay 7October 8154Cherry Creek
Cheyenne Wells 2NE4,203 ftMay 1October 14166Cheyenne Wells
Cimarron6,890 ftJune 20September 1082Montrose
Coal Creek Canyon8,951 ftJune 5September 16103Coal Creek
Cochetopa Creek8,006 ftJune 21September 576Gunnison
Collbran 1WSW6,009 ftMay 17September 30136Collbran
Colorado Nm5,781 ftApril 26October 16173Fruita
Colorado Springs Muni AP6,181 ftMay 3October 8158Cimarron Hills
Cortez6,167 ftMay 12October 7148Cortez
Cortez 8 Se8,035 ftMay 6October 14161Cortez
Cortez Montezuma CO AP5,914 ftMay 27September 28124Cortez
Craig 4SW6,496 ftMay 29September 20114Craig
Craig Moffat CO AP6,186 ftJune 6September 1298Craig
Crestone 2 Se8,004 ftMay 26September 26123Westcliffe
Cripple Creek 3NNW9,235 ftMay 26September 26123Cripple Creek
Crook3,709 ftMay 11October 4146Haxtun
Cumbre Vista - Colorado Spgs 16,942 ftMay 9October 6150Black Forest
Del Norte 3ENE7,846 ftMay 23September 25125Del Norte
Delta 3E5,027 ftMay 1October 7159Delta
Denver Centennial AP5,883 ftMay 5October 8156Inverness
Denver Intl AP5,414 ftMay 5October 9157Aetna Estates
Denver Water Dept5,228 ftApril 30October 12165Denver
Denver-Stapleton5,286 ftMay 4October 8157Aurora
Dinosaur 2 E6,062 ftMay 2October 14165Rangely
Dinosaur Nm5,960 ftMay 12October 5146Rangely
Divide 4NW9,134 ftJune 1September 21112Woodland Park
Dove Creek6,863 ftMay 11October 12154Dove Creek
Durango6,761 ftMay 21October 2134Durango
Durango La Plata CO AP6,660 ftJune 1September 27118Ignacio
Eads4,212 ftApril 30October 13166Eads
Eastonville 2 Nnw7,210 ftMay 29September 21115Black Forest
Elizabeth 2NW6,611 ftMay 16October 2139Elizabeth
Ellicott 7S5,739 ftMay 6October 3150Ellicott
Estes Park 3 Sse7,812 ftMay 30September 17110Estes Park
Evergreen6,985 ftMay 23September 22122Evergreen
Fairplay S Park Rd9,996 ftJune 16September 985Fairplay
Flagler 1S4,921 ftMay 5October 8156Flagler
Fleming 3SW4,256 ftMay 4October 11160Haxtun
Fruita4,498 ftApril 27October 11167Fruita
Ft Collins5,004 ftMay 2October 7158Fort Collins
Ft Collins 4 E4,920 ftMay 3October 6156Fort Collins
Ft Lewis7,614 ftJune 1September 27118Durango
Ft Morgan4,376 ftMay 6October 6153Log Lane Village
Gateway 1ENE4,671 ftApril 20October 21184Redlands
Genoa5,593 ftMay 8October 10155Hugo
Georgetown8,520 ftMay 30September 19112Georgetown
Glade Park 17W6,323 ftMay 21September 26128Loma
Glenwood Spgs #25,895 ftMay 13October 3143Glenwood Springs
Grand Junction 6ESE4,760 ftApril 23October 20180Fruitvale
Grand Junction Walker Fld4,858 ftApril 28October 16171Fruitvale
Grand Junction WFO4,826 ftApril 14October 23192Fruitvale
Grand Lake 6 Ssw8,288 ftJune 13September 786Granby
Grant8,675 ftJune 15September 986Bailey
Great Sand Dunes Np & Preserve8,183 ftMay 21October 1133Alamosa East
Greeley Unc4,715 ftMay 2October 8159Greeley
Green Mt Dam7,741 ftJune 6September 14100Kremmling
Gross Rsvr7,971 ftMay 24September 23122Coal Creek
Guffey 9SE8,915 ftMay 19October 2136Cripple Creek
Hayden6,467 ftJune 1September 20111Hayden
Holly3,401 ftMay 1October 12164Holly
Holyoke3,780 ftMay 11October 3145Holyoke
Hugo 1 Nw5,025 ftMay 10October 2145Hugo
Idalia3,965 ftMay 4October 9158Wray
Ignacio 6ESE6,548 ftMay 23September 29129Ignacio
Joes4,275 ftMay 3October 9159Stratton
John Martin Dam3,814 ftApril 24October 15174Las Animas
Julesburg3,477 ftMay 7October 6152Julesburg
Karval5,075 ftMay 9October 6150Hugo
Kassler5,587 ftMay 8October 3148Roxborough Park
Kim 10SSE5,257 ftApril 24October 18177Springfield
Kim 15 Nne5,190 ftMay 5October 9157La Junta
Kit Carson4,302 ftMay 10October 1144Eads
Kit Carson 9NNE4,346 ftMay 7October 6152Cheyenne Wells
Kremmling7,460 ftJune 14September 583Kremmling
La Junta4,089 ftApril 26October 15172La Junta
La Junta 17 Wsw4,386 ftMay 8October 4149Rocky Ford
La Junta 20 S4,210 ftApril 27October 14170La Junta
La Junta Muni AP4,194 ftApril 24October 15174North La Junta
Lake City8,667 ftJune 8September 17101Lake City
Lake City 1NNE8,714 ftJune 9September 17100Lake City
Lake George 8 Sw8,550 ftJune 2September 19109Cripple Creek
Lakewood5,640 ftMay 3October 7157Applewood
Lamar3,627 ftApril 30October 10163Lamar
Lamar Muni AP3,704 ftMay 2October 7158Lamar
Las Animas3,890 ftApril 29October 12166Las Animas
Lemon Dam8,110 ftMay 28September 30125Bayfield
Leroy 5 Wsw4,467 ftMay 10October 6149Sterling
Limon Wsmo5,364 ftMay 21September 26128Limon
Lindon 5 Wnw4,851 ftMay 15October 2140Deer Trail
Longmont 2 Ese4,950 ftMay 7October 5151Longmont
Loveland 2N5,080 ftMay 10October 1144Loveland
Manassa7,695 ftMay 28September 21116Manassa
Mancos 1SW6,897 ftJune 4September 24112Mancos
Marston Fltr Plt5,610 ftMay 2October 11162Bow Mar
Massadona 3E6,140 ftMay 10October 4147Rangely
Matheson 8 Se5,830 ftMay 12October 2143Limon
Maybell5,944 ftJune 16September 985Craig
Meeker6,229 ftJune 4September 16104Meeker
Meeker AP6,390 ftMay 30September 22115Meeker
Mesa Verde Np7,142 ftMay 9October 14158Cortez
Monte Vista 2W7,695 ftJune 11September 1394Monte Vista
Montrose #25,789 ftApril 28October 14169Montrose
Montrose 11 Ene8,402 ftMay 20October 1134Montrose
Montrose Rgnl AP5,759 ftMay 2October 8159Montrose
Monument7,080 ftMay 14October 1140Monument
Monument 3S6,821 ftMay 17October 1137Monument
New Raymer4,783 ftMay 9October 4148Log Lane Village
New Raymer 21 N5,180 ftMay 18September 29134
Northdale6,681 ftJune 3September 25114Dove Creek
Northglenn5,407 ftMay 2October 11162Northglenn
Norwood7,020 ftMay 25October 1129Norwood
Norwood #27,011 ftMay 21October 1133Norwood
Nunn 7 Nne5,390 ftMay 13September 27137Pierce
Ordway 1 Ene4,312 ftMay 2October 8159Ordway
Ordway 21 N4,767 ftMay 3October 7157Ordway
Ouray7,840 ftMay 17October 1137Ouray
Ouray #27,718 ftMay 18October 4139Ouray
Palisade4,751 ftApril 17October 26192Palisade
Paonia 1SW5,581 ftMay 3October 12162Paonia
Paradox 2N5,447 ftMay 11October 5147Nucla
Parker5,904 ftMay 9October 3147Parker
Placerville7,383 ftMay 26September 29126Mountain Village
Pueblo Mem AP4,720 ftApril 30October 9162Blende
Pueblo Rsvr4,861 ftApril 26October 13170Pueblo
Ralston Rsvr5,900 ftMay 3October 14164Golden
Rangely 1E5,277 ftMay 15October 1139Rangely
Ridgway7,049 ftJune 11September 1394Ridgway
Rifle 3ENE5,469 ftMay 23September 25125Rifle
Rifle Garfield CO AP5,530 ftMay 11October 4146Rifle
Rio Grande Rsvr9,493 ftJune 15September 1188Creede
Rocky Ford 2 Se4,170 ftMay 1October 8160Rocky Ford
Roxborough SP6,117 ftMay 16October 1138Roxborough Park
Rush 1N6,054 ftMay 9October 4148Ellicott
Rustic 9WSW7,701 ftJune 5September 16103Estes Park
Ruxton Park9,060 ftJune 3September 17106Manitou Springs
Rye 1SW7,141 ftMay 5October 10158Colorado City
Saguache7,701 ftMay 16September 28135Saguache
Salida7,160 ftMay 29September 20114Salida
San Luis 1 S7,943 ftMay 31September 23115San Luis
Sedgwick 5 S3,996 ftMay 6October 7154Julesburg
Seibert4,706 ftMay 4October 11160Flagler
Shaw 4ENE5,000 ftMay 12October 4145Flagler
Sheep Mtn7,744 ftMay 27September 25121La Veta
Sheridan Lake4,070 ftApril 27October 15171Cheyenne Wells
Sheridan Lake 4E4,039 ftApril 28October 13168
Shoshone5,992 ftMay 1October 14166Glenwood Springs
Springfield Comanche4,383 ftMay 3October 10160Springfield
Steamboat Springs6,866 ftJune 9September 1295Steamboat Springs
Sterling3,974 ftApril 30October 9162Sterling
Stratton4,399 ftMay 6October 9156Stratton
Strontia Springs Dam5,840 ftMay 16September 29136Roxborough Park
Tacony 13 Se4,882 ftMay 5October 6154Fowler
Taylor Park9,180 ftJune 20September 880Mount Crested Butte
Trinidad6,030 ftApril 30October 15168Trinidad
Trinidad Lake6,310 ftMay 11October 4146Trinidad
Trinidad Perry Stokes AP5,741 ftMay 4October 9158Trinidad
Twin Lakes Rsvr9,236 ftJune 16September 1086Leadville
Uravan5,021 ftApril 26October 18175Nucla
Vail8,305 ftJune 21September 778Vail
Vallecito Dam7,644 ftMay 31September 26118Bayfield
Vallecito Reservoir7,673 ftMay 18October 11146Bayfield
Virginia Dale 7 Ene7,015 ftMay 31September 19111Wellington
Walsenburg 1 Nw6,292 ftMay 6October 4151Walsenburg
Walsh 1 W3,978 ftApril 30October 14167Walsh
Waterdale5,230 ftMay 12October 1142Loveland
Waverly 1W7,603 ftJune 6September 15101Alamosa
Westcliffe7,873 ftJune 11September 990Westcliffe
WFO Pueblo4,653 ftApril 30October 9162Blende
Wheat Ridge 25,398 ftMay 5October 5153Wheat Ridge
Wild Horse 6N4,654 ftMay 4October 8157Flagler
Williams Fork Dam7,618 ftJune 12September 1090Hot Sulphur Springs
Woodrow 6NNE4,374 ftMay 15October 1139Brush
Wray3,553 ftMay 7October 6152Wray
Yampa7,857 ftJune 14September 1189Oak Creek
Yellow Jacket 2W6,933 ftMay 17October 9145Dolores
Yellow Jacket 4NE7,090 ftMay 15October 8146Dolores
Yuma4,134 ftMay 1October 12164Yuma

Sources

NOAA NCEI U.S. Climate Normals, 1991-2020, annual and seasonal freeze probabilities. Public domain.