Frost dates in Colorado
Across 210 NOAA stations in Colorado, the average last spring frost ranges from April 14 at Grand Junction Wfo to June 21 at Boulder 14 W.
| Akron 4 E | May 8 | October 6 | 149 |
| Akron Washington Co Airport | May 6 | October 8 | 155 |
| Alamosa 1E | May 30 | September 17 | 108 |
| Alamosa San Luis Airport | June 7 | September 15 | 98 |
| Allenspark 3Nw | June 14 | September 12 | 92 |
| Altenbern | May 25 | September 25 | 120 |
| Arapahoe 12S | May 5 | October 9 | 156 |
| Arapahoe 14N | May 9 | October 7 | 150 |
| Aspen 1Sw | June 2 | September 23 | 113 |
| Aspen Pitkin Co Airport | May 31 | September 23 | 114 |
| Bailey | June 16 | September 8 | 84 |
| Black Canyon Of The Gunnison | May 23 | October 1 | 130 |
| Black Forest 6Wnw | May 11 | October 6 | 147 |
| Blanca 4 Nw | May 25 | September 22 | 117 |
| Blue Mesa Lake | June 9 | September 16 | 96 |
| Bonny Dam 2Ne | May 5 | October 10 | 155 |
| Boulder | May 6 | October 5 | 151 |
| Boulder 14 W | June 21 | September 2 | 71 |
| Briggsdale | May 12 | September 28 | 135 |
| Brighton 3 Se | May 3 | October 7 | 155 |
| Buckhorn Mtn 1 E | May 21 | September 29 | 128 |
| Buena Vista 2S | May 27 | September 23 | 116 |
| Burlington | May 6 | October 9 | 155 |
| Burlington Carson Airport | May 2 | October 10 | 160 |
| Byers 5 Ene | May 13 | October 2 | 142 |
| Cabin Creek | June 6 | September 19 | 103 |
| Campo 7 S | April 29 | October 13 | 166 |
| Canon City | May 4 | October 7 | 153 |
| Castle Rock | May 9 | October 2 | 143 |
| Cedaredge 3E | May 3 | October 9 | 156 |
| Center 4 Ssw | May 24 | September 24 | 120 |
| Cheesman | May 17 | October 1 | 135 |
| Cheraw 1 N | April 30 | October 10 | 163 |
| Cherry Creek Dam | May 7 | October 8 | 152 |
| Cheyenne Wells 2Ne | May 1 | October 14 | 165 |
| Cimarron | June 20 | September 10 | 81 |
| Coal Creek Canyon | June 5 | September 16 | 103 |
| Cochetopa Creek | June 21 | September 5 | 74 |
| Collbran 1Wsw | May 17 | September 30 | 136 |
| Colorado Nm | April 26 | October 16 | 172 |
| Colorado Springs Muni Airport | May 3 | October 8 | 158 |
| Cortez | May 12 | October 7 | 147 |
| Cortez 8 Se | May 6 | October 14 | 158 |
| Cortez Montezuma Co Airport | May 27 | September 28 | 125 |
| Craig 4Sw | May 29 | September 20 | 113 |
| Craig Moffat Co Airport | June 6 | September 12 | 96 |
| Crestone 2 Se | May 26 | September 26 | 120 |
| Cripple Creek 3Nnw | May 26 | September 26 | 121 |
| Crook | May 11 | October 4 | 145 |
| Cumbre Vista - Colorado Spgs 1 | May 9 | October 6 | 150 |
| Del Norte 3Ene | May 23 | September 25 | 123 |
| Delta 3E | May 1 | October 7 | 159 |
| Denver Centennial Airport | May 5 | October 8 | 154 |
| Denver Intl Airport | May 5 | October 9 | 156 |
| Denver Water Dept | April 30 | October 12 | 165 |
| Denver-Stapleton | May 4 | October 8 | 156 |
| Dinosaur 2 E | May 2 | October 14 | 161 |
| Dinosaur Nm | May 12 | October 5 | 146 |
| Divide 4Nw | June 1 | September 21 | 110 |
| Dove Creek | May 11 | October 12 | 152 |
| Durango | May 21 | October 2 | 134 |
| Durango La Plata Co Airport | June 1 | September 27 | 116 |
| Eads | April 30 | October 13 | 165 |
| Eastonville 2 Nnw | May 29 | September 21 | 114 |
| Elizabeth 2Nw | May 16 | October 2 | 137 |
| Ellicott 7S | May 6 | October 3 | 149 |
| Estes Park 3 Sse | May 30 | September 17 | 109 |
| Evergreen | May 23 | September 22 | 118 |
| Fairplay S Park Rd | June 16 | September 9 | 83 |
| Flagler 1S | May 5 | October 8 | 155 |
| Fleming 3Sw | May 4 | October 11 | 157 |
| Fruita | April 27 | October 11 | 164 |
| Ft Collins | May 2 | October 7 | 157 |
| Ft Collins 4 E | May 3 | October 6 | 154 |
| Ft Lewis | June 1 | September 27 | 116 |
| Ft Morgan | May 6 | October 6 | 153 |
| Gateway 1Ene | April 20 | October 21 | 182 |
| Genoa | May 8 | October 10 | 155 |
| Georgetown | May 30 | September 19 | 112 |
| Glade Park 17W | May 21 | September 26 | 126 |
| Glenwood Spgs #2 | May 13 | October 3 | 142 |
| Grand Junction 6Ese | April 23 | October 20 | 179 |
| Grand Junction Walker Fld | April 28 | October 16 | 171 |
| Grand Junction Wfo | April 14 | October 23 | 190 |
| Grand Lake 6 Ssw | June 13 | September 7 | 84 |
| Grant | June 15 | September 9 | 84 |
| Great Sand Dunes Np & Preserve | May 21 | October 1 | 131 |
| Greeley Unc | May 2 | October 8 | 159 |
| Green Mt Dam | June 6 | September 14 | 98 |
| Gross Rsvr | May 24 | September 23 | 120 |
| Guffey 9Se | May 19 | October 2 | 134 |
| Hayden | June 1 | September 20 | 109 |
| Holly | May 1 | October 12 | 163 |
| Holyoke | May 11 | October 3 | 144 |
| Hugo 1 Nw | May 10 | October 2 | 143 |
| Idalia | May 4 | October 9 | 155 |
| Ignacio 6Ese | May 23 | September 29 | 128 |
| Joes | May 3 | October 9 | 158 |
| John Martin Dam | April 24 | October 15 | 172 |
| Julesburg | May 7 | October 6 | 152 |
| Karval | May 9 | October 6 | 149 |
| Kassler | May 8 | October 3 | 147 |
| Kim 10Sse | April 24 | October 18 | 175 |
| Kim 15 Nne | May 5 | October 9 | 156 |
| Kit Carson | May 10 | October 1 | 142 |
| Kit Carson 9Nne | May 7 | October 6 | 151 |
| Kremmling | June 14 | September 5 | 80 |
| La Junta | April 26 | October 15 | 171 |
| La Junta 17 Wsw | May 8 | October 4 | 148 |
| La Junta 20 S | April 27 | October 14 | 168 |
| La Junta Muni Airport | April 24 | October 15 | 173 |
| Lake City | June 8 | September 17 | 101 |
| Lake City 1Nne | June 9 | September 17 | 99 |
| Lake George 8 Sw | June 2 | September 19 | 108 |
| Lakewood | May 3 | October 7 | 155 |
| Lamar | April 30 | October 10 | 163 |
| Lamar Muni Airport | May 2 | October 7 | 157 |
| Las Animas | April 29 | October 12 | 166 |
| Lemon Dam | May 28 | September 30 | 122 |
| Leroy 5 Wsw | May 10 | October 6 | 147 |
| Limon Wsmo | May 21 | September 26 | 127 |
| Lindon 5 Wnw | May 15 | October 2 | 139 |
| Longmont 2 Ese | May 7 | October 5 | 151 |
| Loveland 2N | May 10 | October 1 | 142 |
| Manassa | May 28 | September 21 | 115 |
| Mancos 1Sw | June 4 | September 24 | 111 |
| Marston Fltr Plt | May 2 | October 11 | 160 |
| Massadona 3E | May 10 | October 4 | 147 |
| Matheson 8 Se | May 12 | October 2 | 141 |
| Maybell | June 16 | September 9 | 83 |
| Meeker | June 4 | September 16 | 104 |
| Meeker Airport | May 30 | September 22 | 117 |
| Mesa Verde Np | May 9 | October 14 | 156 |
| Monte Vista 2W | June 11 | September 13 | 92 |
| Montrose #2 | April 28 | October 14 | 167 |
| Montrose 11 Ene | May 20 | October 1 | 132 |
| Montrose Rgnl Airport | May 2 | October 8 | 157 |
| Monument | May 14 | October 1 | 138 |
| Monument 3S | May 17 | October 1 | 136 |
| New Raymer | May 9 | October 4 | 146 |
| New Raymer 21 N | May 18 | September 29 | 133 |
| Northdale | June 3 | September 25 | 113 |
| Northglenn | May 2 | October 11 | 160 |
| Norwood | May 25 | October 1 | 128 |
| Norwood #2 | May 21 | October 1 | 131 |
| Nunn 7 Nne | May 13 | September 27 | 136 |
| Ordway 1 Ene | May 2 | October 8 | 159 |
| Ordway 21 N | May 3 | October 7 | 155 |
| Ouray | May 17 | October 1 | 137 |
| Ouray #2 | May 18 | October 4 | 139 |
| Palisade | April 17 | October 26 | 190 |
| Paonia 1Sw | May 3 | October 12 | 159 |
| Paradox 2N | May 11 | October 5 | 146 |
| Parker | May 9 | October 3 | 145 |
| Placerville | May 26 | September 29 | 125 |
| Pueblo Mem Airport | April 30 | October 9 | 161 |
| Pueblo Rsvr | April 26 | October 13 | 166 |
| Ralston Rsvr | May 3 | October 14 | 161 |
| Rangely 1E | May 15 | October 1 | 136 |
| Ridgway | June 11 | September 13 | 92 |
| Rifle 3Ene | May 23 | September 25 | 124 |
| Rifle Garfield Co Airport | May 11 | October 4 | 143 |
| Rio Grande Rsvr | June 15 | September 11 | 85 |
| Rocky Ford 2 Se | May 1 | October 8 | 159 |
| Roxborough Sp | May 16 | October 1 | 136 |
| Rush 1N | May 9 | October 4 | 146 |
| Rustic 9Wsw | June 5 | September 16 | 101 |
| Ruxton Park | June 3 | September 17 | 102 |
| Rye 1Sw | May 5 | October 10 | 156 |
| Saguache | May 16 | September 28 | 135 |
| Salida | May 29 | September 20 | 112 |
| San Luis 1 S | May 31 | September 23 | 115 |
| Sedgwick 5 S | May 6 | October 7 | 152 |
| Seibert | May 4 | October 11 | 158 |
| Shaw 4Ene | May 12 | October 4 | 143 |
| Sheep Mtn | May 27 | September 25 | 119 |
| Sheridan Lake | April 27 | October 15 | 170 |
| Sheridan Lake 4E | April 28 | October 13 | 167 |
| Shoshone | May 1 | October 14 | 164 |
| Springfield Comanche | May 3 | October 10 | 158 |
| Steamboat Springs | June 9 | September 12 | 93 |
| Sterling | April 30 | October 9 | 161 |
| Stratton | May 6 | October 9 | 155 |
| Strontia Springs Dam | May 16 | September 29 | 132 |
| Tacony 13 Se | May 5 | October 6 | 153 |
| Taylor Park | June 20 | September 8 | 80 |
| Trinidad | April 30 | October 15 | 167 |
| Trinidad Lake | May 11 | October 4 | 145 |
| Trinidad Perry Stokes Airport | May 4 | October 9 | 156 |
| Twin Lakes Rsvr | June 16 | September 10 | 85 |
| Uravan | April 26 | October 18 | 174 |
| Vail | June 21 | September 7 | 77 |
| Vallecito Dam | May 31 | September 26 | 119 |
| Vallecito Reservoir | May 18 | October 11 | 145 |
| Virginia Dale 7 Ene | May 31 | September 19 | 110 |
| Walsenburg 1 Nw | May 6 | October 4 | 149 |
| Walsh 1 W | April 30 | October 14 | 166 |
| Waterdale | May 12 | October 1 | 141 |
| Waverly 1W | June 6 | September 15 | 100 |
| Westcliffe | June 11 | September 9 | 89 |
| Wfo Pueblo | April 30 | October 9 | 162 |
| Wheat Ridge 2 | May 5 | October 5 | 151 |
| Wild Horse 6N | May 4 | October 8 | 155 |
| Williams Fork Dam | June 12 | September 10 | 89 |
| Woodrow 6Nne | May 15 | October 1 | 140 |
| Wray | May 7 | October 6 | 151 |
| Yampa | June 14 | September 11 | 89 |
| Yellow Jacket 2W | May 17 | October 9 | 145 |
| Yellow Jacket 4Ne | May 15 | October 8 | 147 |
| Yuma | May 1 | October 12 | 164 |
Sources
- U.S. Annual/Seasonal Climate Normals, 1991 to 2020 (freeze probability dates by station), NOAA National Centers for Environmental Information, checked 1 November 2026
- Annual/Seasonal Normals 1991 to 2020 documentation, NOAA National Centers for Environmental Information, checked 1 November 2026
- 2024 Gazetteer Files, ZIP Code Tabulation Areas, US Census Bureau, checked 1 November 2026