Frost Dates in Colorado
Across 210 NOAA weather stations in Colorado, the average last spring frost falls between April 14 at Grand Junction Wfo and June 21 at Vail. At a typical Colorado station it is around May 11, with the first fall frost around October 4 and a frost-free season of about 145 days.
Find the frost dates for your ZIP code
A typical Colorado season
What shapes frost dates in Colorado
- The frost-free season ranges from 71 days at Boulder 14 W to 190 days at Palisade.
- Elevation matters: Cabin Creek, at 10,020 ft, averages its last frost on June 6, while Holly, at 3,401 ft, averages May 1.
- Gardens in valleys and low spots, where cold air settles, often frost a week or more later in spring than the nearest station.
Frost dates at major airports
| Station | Last frost | Safer date | First frost | Season (days) |
|---|---|---|---|---|
| Akron Washington Co Airport | May 6 | May 19 | Oct 8 | 155 |
| Alamosa San Luis Airport | Jun 7 | Jun 24 | Sep 15 | 98 |
| Aspen Pitkin Co Airport | May 31 | Jun 14 | Sep 23 | 114 |
| Boulder 14 W | Jun 21 | Jul 4 | Sep 2 | 71 |
| Burlington Carson Airport | May 2 | May 16 | Oct 10 | 160 |
| Colorado Springs Muni Airport | May 3 | May 15 | Oct 8 | 158 |
| Cortez 8 SE | May 6 | May 27 | Oct 14 | 158 |
| Cortez Montezuma Co Airport | May 27 | Jun 11 | Sep 28 | 125 |
| Craig Moffat Co Airport | Jun 6 | Jun 24 | Sep 12 | 96 |
| Denver Centennial Airport | May 5 | May 17 | Oct 8 | 154 |
| Denver Intl Airport | May 5 | May 19 | Oct 9 | 156 |
| Denver-Stapleton | May 4 | May 16 | Oct 8 | 156 |
| Dinosaur 2 E | May 2 | May 17 | Oct 14 | 161 |
| Durango La Plata Co Airport | Jun 1 | Jun 15 | Sep 27 | 116 |
| Grand Junction Walker Fld | Apr 28 | May 14 | Oct 16 | 171 |
| La Junta 17 WSW | May 8 | May 25 | Oct 4 | 148 |
| La Junta Muni Airport | Apr 24 | May 6 | Oct 15 | 173 |
| Lamar Muni Airport | May 2 | May 17 | Oct 7 | 157 |
| Limon Wsmo | May 21 | Jun 4 | Sep 26 | 127 |
| Meeker Airport | May 30 | Jun 13 | Sep 22 | 117 |
| Montrose 11 ENE | May 20 | Jun 4 | Oct 1 | 132 |
| Montrose Rgnl Airport | May 2 | May 17 | Oct 8 | 157 |
| Nunn 7 NNE | May 13 | May 27 | Sep 27 | 136 |
| Pueblo Mem Airport | Apr 30 | May 12 | Oct 9 | 161 |
| Rifle Garfield Co Airport | May 11 | May 27 | Oct 4 | 143 |
| Springfield Comanche | May 3 | May 17 | Oct 10 | 158 |
| Trinidad Perry Stokes Airport | May 4 | May 19 | Oct 9 | 156 |
All 210 weather stations in Colorado
| Station | Elevation (ft) | Last frost | Safer date | First frost | Season (days) |
|---|---|---|---|---|---|
| Akron 4 E | 4,542 | May 8 | May 22 | Oct 6 | 149 |
| Akron Washington Co Airport | 4,663 | May 6 | May 19 | Oct 8 | 155 |
| Alamosa 1E | 7,540 | May 30 | Jun 13 | Sep 17 | 108 |
| Alamosa San Luis Airport | 7,533 | Jun 7 | Jun 24 | Sep 15 | 98 |
| Allenspark 3NW | 8,500 | Jun 14 | Jun 28 | Sep 12 | 92 |
| Altenbern | 5,637 | May 25 | Jun 13 | Sep 25 | 120 |
| Arapahoe 12S | 4,065 | May 5 | May 19 | Oct 9 | 156 |
| Arapahoe 14N | 4,142 | May 9 | May 22 | Oct 7 | 150 |
| Aspen 1SW | 8,175 | Jun 2 | Jun 17 | Sep 23 | 113 |
| Aspen Pitkin Co Airport | 7,720 | May 31 | Jun 14 | Sep 23 | 114 |
| Bailey | 7,752 | Jun 16 | Jul 1 | Sep 8 | 84 |
| Black Canyon Of The Gunnison | 8,151 | May 23 | Jun 9 | Oct 1 | 130 |
| Black Forest 6WNW | 6,957 | May 11 | May 25 | Oct 6 | 147 |
| Blanca 4 NW | 7,709 | May 25 | Jun 12 | Sep 22 | 117 |
| Blue Mesa Lake | 7,568 | Jun 9 | Jun 24 | Sep 16 | 96 |
| Bonny Dam 2NE | 3,717 | May 5 | May 19 | Oct 10 | 155 |
| Boulder | 5,484 | May 6 | May 18 | Oct 5 | 151 |
| Boulder 14 W | 9,828 | Jun 21 | Jul 4 | Sep 2 | 71 |
| Briggsdale | 4,862 | May 12 | May 25 | Sep 28 | 135 |
| Brighton 3 SE | 5,016 | May 3 | May 16 | Oct 7 | 155 |
| Buckhorn Mtn 1 E | 7,400 | May 21 | Jun 4 | Sep 29 | 128 |
| Buena Vista 2S | 7,954 | May 27 | Jun 11 | Sep 23 | 116 |
| Burlington | 4,162 | May 6 | May 19 | Oct 9 | 155 |
| Burlington Carson Airport | 4,192 | May 2 | May 16 | Oct 10 | 160 |
| Byers 5 ENE | 5,101 | May 13 | May 30 | Oct 2 | 142 |
| Cabin Creek | 10,020 | Jun 6 | Jun 21 | Sep 19 | 103 |
| Campo 7 S | 4,105 | Apr 29 | May 12 | Oct 13 | 166 |
| Canon City | 5,378 | May 4 | May 18 | Oct 7 | 153 |
| Castle Rock | 6,185 | May 9 | May 24 | Oct 2 | 143 |
| Cedaredge 3E | 6,838 | May 3 | May 21 | Oct 9 | 156 |
| Center 4 SSW | 7,673 | May 24 | Jun 8 | Sep 24 | 120 |
| Cheesman | 6,880 | May 17 | Jun 6 | Oct 1 | 135 |
| Cheraw 1 N | 4,147 | Apr 30 | May 13 | Oct 10 | 163 |
| Cherry Creek Dam | 5,647 | May 7 | May 21 | Oct 8 | 152 |
| Cheyenne Wells 2NE | 4,203 | May 1 | May 17 | Oct 14 | 165 |
| Cimarron | 6,890 | Jun 20 | Jul 7 | Sep 10 | 81 |
| Coal Creek Canyon | 8,950 | Jun 5 | Jun 19 | Sep 16 | 103 |
| Cochetopa Creek | 8,006 | Jun 21 | Jul 7 | Sep 5 | 74 |
| Collbran 1WSW | 6,009 | May 17 | Jun 3 | Sep 30 | 136 |
| Colorado Nm | 5,781 | Apr 26 | May 15 | Oct 16 | 172 |
| Colorado Springs Muni Airport | 6,181 | May 3 | May 15 | Oct 8 | 158 |
| Cortez | 6,167 | May 12 | May 31 | Oct 7 | 147 |
| Cortez 8 SE | 8,034 | May 6 | May 27 | Oct 14 | 158 |
| Cortez Montezuma Co Airport | 5,914 | May 27 | Jun 11 | Sep 28 | 125 |
| Craig 4SW | 6,496 | May 29 | Jun 13 | Sep 20 | 113 |
| Craig Moffat Co Airport | 6,186 | Jun 6 | Jun 24 | Sep 12 | 96 |
| Crestone 2 SE | 8,004 | May 26 | Jun 9 | Sep 26 | 120 |
| Cripple Creek 3NNW | 9,235 | May 26 | Jun 9 | Sep 26 | 121 |
| Crook | 3,709 | May 11 | May 23 | Oct 4 | 145 |
| Cumbre Vista - Colorado Spgs 1 | 6,942 | May 9 | May 20 | Oct 6 | 150 |
| Del Norte 3ENE | 7,845 | May 23 | Jun 8 | Sep 25 | 123 |
| Delta 3E | 5,027 | May 1 | May 14 | Oct 7 | 159 |
| Denver Centennial Airport | 5,883 | May 5 | May 17 | Oct 8 | 154 |
| Denver Intl Airport | 5,414 | May 5 | May 19 | Oct 9 | 156 |
| Denver Water Dept | 5,228 | Apr 30 | May 13 | Oct 12 | 165 |
| Denver-Stapleton | 5,286 | May 4 | May 16 | Oct 8 | 156 |
| Dinosaur 2 E | 6,062 | May 2 | May 17 | Oct 14 | 161 |
| Dinosaur Nm | 5,960 | May 12 | Jun 1 | Oct 5 | 146 |
| Divide 4NW | 9,134 | Jun 1 | Jun 17 | Sep 21 | 110 |
| Dove Creek | 6,863 | May 11 | May 25 | Oct 12 | 152 |
| Durango | 6,761 | May 21 | Jun 7 | Oct 2 | 134 |
| Durango La Plata Co Airport | 6,660 | Jun 1 | Jun 15 | Sep 27 | 116 |
| Eads | 4,212 | Apr 30 | May 12 | Oct 13 | 165 |
| Eastonville 2 NNW | 7,210 | May 29 | Jun 13 | Sep 21 | 114 |
| Elizabeth 2NW | 6,611 | May 16 | Jun 1 | Oct 2 | 137 |
| Ellicott 7S | 5,739 | May 6 | May 28 | Oct 3 | 149 |
| Estes Park 3 SSE | 7,812 | May 30 | Jun 14 | Sep 17 | 109 |
| Evergreen | 6,985 | May 23 | Jun 10 | Sep 22 | 118 |
| Fairplay S Park Rd | 9,995 | Jun 16 | Jun 30 | Sep 9 | 83 |
| Flagler 1S | 4,921 | May 5 | May 20 | Oct 8 | 155 |
| Fleming 3SW | 4,256 | May 4 | May 16 | Oct 11 | 157 |
| Fruita | 4,498 | Apr 27 | May 7 | Oct 11 | 164 |
| Ft Collins | 5,004 | May 2 | May 14 | Oct 7 | 157 |
| Ft Collins 4 E | 4,920 | May 3 | May 15 | Oct 6 | 154 |
| Ft Lewis | 7,614 | Jun 1 | Jun 19 | Sep 27 | 116 |
| Ft Morgan | 4,376 | May 6 | May 19 | Oct 6 | 153 |
| Gateway 1ENE | 4,671 | Apr 20 | May 5 | Oct 21 | 182 |
| Genoa | 5,593 | May 8 | May 22 | Oct 10 | 155 |
| Georgetown | 8,520 | May 30 | Jun 14 | Sep 19 | 112 |
| Glade Park 17W | 6,323 | May 21 | Jun 9 | Sep 26 | 126 |
| Glenwood Spgs #2 | 5,895 | May 13 | May 30 | Oct 3 | 142 |
| Grand Junction 6ESE | 4,760 | Apr 23 | May 9 | Oct 20 | 179 |
| Grand Junction Walker Fld | 4,858 | Apr 28 | May 14 | Oct 16 | 171 |
| Grand Junction Wfo | 4,826 | Apr 14 | Apr 28 | Oct 23 | 190 |
| Grand Lake 6 SSW | 8,288 | Jun 13 | Jun 28 | Sep 7 | 84 |
| Grant | 8,675 | Jun 15 | Jun 30 | Sep 9 | 84 |
| Great Sand Dunes Np & Preserve | 8,183 | May 21 | Jun 3 | Oct 1 | 131 |
| Greeley Unc | 4,715 | May 2 | May 14 | Oct 8 | 159 |
| Green Mt Dam | 7,740 | Jun 6 | Jun 23 | Sep 14 | 98 |
| Gross Rsvr | 7,970 | May 24 | Jun 10 | Sep 23 | 120 |
| Guffey 9SE | 8,915 | May 19 | May 31 | Oct 2 | 134 |
| Hayden | 6,467 | Jun 1 | Jun 16 | Sep 20 | 109 |
| Holly | 3,401 | May 1 | May 14 | Oct 12 | 163 |
| Holyoke | 3,780 | May 11 | May 23 | Oct 3 | 144 |
| Hugo 1 NW | 5,025 | May 10 | May 25 | Oct 2 | 143 |
| Idalia | 3,965 | May 4 | May 17 | Oct 9 | 155 |
| Ignacio 6ESE | 6,548 | May 23 | Jun 7 | Sep 29 | 128 |
| Joes | 4,275 | May 3 | May 15 | Oct 9 | 158 |
| John Martin Dam | 3,814 | Apr 24 | May 8 | Oct 15 | 172 |
| Julesburg | 3,477 | May 7 | May 18 | Oct 6 | 152 |
| Karval | 5,075 | May 9 | May 23 | Oct 6 | 149 |
| Kassler | 5,587 | May 8 | May 22 | Oct 3 | 147 |
| Kim 10SSE | 5,257 | Apr 24 | May 6 | Oct 18 | 175 |
| Kim 15 NNE | 5,190 | May 5 | May 19 | Oct 9 | 156 |
| Kit Carson | 4,302 | May 10 | May 24 | Oct 1 | 142 |
| Kit Carson 9NNE | 4,346 | May 7 | May 24 | Oct 6 | 151 |
| Kremmling | 7,460 | Jun 14 | Jun 30 | Sep 5 | 80 |
| La Junta | 4,089 | Apr 26 | May 9 | Oct 15 | 171 |
| La Junta 17 WSW | 4,386 | May 8 | May 25 | Oct 4 | 148 |
| La Junta 20 S | 4,210 | Apr 27 | May 11 | Oct 14 | 168 |
| La Junta Muni Airport | 4,194 | Apr 24 | May 6 | Oct 15 | 173 |
| Lake City | 8,667 | Jun 8 | Jun 24 | Sep 17 | 101 |
| Lake City 1NNE | 8,714 | Jun 9 | Jun 22 | Sep 17 | 99 |
| Lake George 8 SW | 8,550 | Jun 2 | Jun 17 | Sep 19 | 108 |
| Lakewood | 5,640 | May 3 | May 18 | Oct 7 | 155 |
| Lamar | 3,627 | Apr 30 | May 13 | Oct 10 | 163 |
| Lamar Muni Airport | 3,704 | May 2 | May 17 | Oct 7 | 157 |
| Las Animas | 3,890 | Apr 29 | May 11 | Oct 12 | 166 |
| Lemon Dam | 8,110 | May 28 | Jun 10 | Sep 30 | 122 |
| Leroy 5 WSW | 4,467 | May 10 | May 22 | Oct 6 | 147 |
| Limon Wsmo | 5,364 | May 21 | Jun 4 | Sep 26 | 127 |
| Lindon 5 WNW | 4,851 | May 15 | May 30 | Oct 2 | 139 |
| Longmont 2 ESE | 4,950 | May 7 | May 22 | Oct 5 | 151 |
| Loveland 2N | 5,080 | May 10 | May 22 | Oct 1 | 142 |
| Manassa | 7,695 | May 28 | Jun 11 | Sep 21 | 115 |
| Mancos 1SW | 6,897 | Jun 4 | Jun 19 | Sep 24 | 111 |
| Marston Fltr Plt | 5,610 | May 2 | May 17 | Oct 11 | 160 |
| Massadona 3E | 6,140 | May 10 | May 27 | Oct 4 | 147 |
| Matheson 8 SE | 5,830 | May 12 | May 26 | Oct 2 | 141 |
| Maybell | 5,944 | Jun 16 | Jul 1 | Sep 9 | 83 |
| Meeker | 6,229 | Jun 4 | Jun 23 | Sep 16 | 104 |
| Meeker Airport | 6,390 | May 30 | Jun 13 | Sep 22 | 117 |
| Mesa Verde Np | 7,142 | May 9 | May 27 | Oct 14 | 156 |
| Monte Vista 2W | 7,695 | Jun 11 | Jun 25 | Sep 13 | 92 |
| Montrose #2 | 5,789 | Apr 28 | May 12 | Oct 14 | 167 |
| Montrose 11 ENE | 8,402 | May 20 | Jun 4 | Oct 1 | 132 |
| Montrose Rgnl Airport | 5,759 | May 2 | May 17 | Oct 8 | 157 |
| Monument | 7,080 | May 14 | May 31 | Oct 1 | 138 |
| Monument 3S | 6,821 | May 17 | May 30 | Oct 1 | 136 |
| New Raymer | 4,783 | May 9 | May 22 | Oct 4 | 146 |
| New Raymer 21 N | 5,180 | May 18 | Jun 2 | Sep 29 | 133 |
| Northdale | 6,681 | Jun 3 | Jun 19 | Sep 25 | 113 |
| Northglenn | 5,407 | May 2 | May 14 | Oct 11 | 160 |
| Norwood | 7,020 | May 25 | Jun 13 | Oct 1 | 128 |
| Norwood #2 | 7,011 | May 21 | Jun 5 | Oct 1 | 131 |
| Nunn 7 NNE | 5,390 | May 13 | May 27 | Sep 27 | 136 |
| Ordway 1 ENE | 4,312 | May 2 | May 14 | Oct 8 | 159 |
| Ordway 21 N | 4,767 | May 3 | May 16 | Oct 7 | 155 |
| Ouray | 7,840 | May 17 | Jun 3 | Oct 1 | 137 |
| Ouray #2 | 7,718 | May 18 | May 31 | Oct 4 | 139 |
| Palisade | 4,751 | Apr 17 | May 3 | Oct 26 | 190 |
| Paonia 1SW | 5,581 | May 3 | May 18 | Oct 12 | 159 |
| Paradox 2N | 5,447 | May 11 | May 29 | Oct 5 | 146 |
| Parker | 5,904 | May 9 | May 23 | Oct 3 | 145 |
| Placerville | 7,383 | May 26 | Jun 6 | Sep 29 | 125 |
| Pueblo Mem Airport | 4,720 | Apr 30 | May 12 | Oct 9 | 161 |
| Pueblo Rsvr | 4,861 | Apr 26 | May 8 | Oct 13 | 166 |
| Ralston Rsvr | 5,900 | May 3 | May 17 | Oct 14 | 161 |
| Rangely 1E | 5,277 | May 15 | Jun 2 | Oct 1 | 136 |
| Ridgway | 7,049 | Jun 11 | Jun 30 | Sep 13 | 92 |
| Rifle 3ENE | 5,469 | May 23 | Jun 6 | Sep 25 | 124 |
| Rifle Garfield Co Airport | 5,530 | May 11 | May 27 | Oct 4 | 143 |
| Rio Grande Rsvr | 9,492 | Jun 15 | Jun 30 | Sep 11 | 85 |
| Rocky Ford 2 SE | 4,170 | May 1 | May 14 | Oct 8 | 159 |
| Roxborough Sp | 6,117 | May 16 | Jun 1 | Oct 1 | 136 |
| Rush 1N | 6,054 | May 9 | May 22 | Oct 4 | 146 |
| Rustic 9WSW | 7,700 | Jun 5 | Jun 20 | Sep 16 | 101 |
| Ruxton Park | 9,060 | Jun 3 | Jun 23 | Sep 17 | 102 |
| Rye 1SW | 7,141 | May 5 | May 20 | Oct 10 | 156 |
| Saguache | 7,701 | May 16 | May 31 | Sep 28 | 135 |
| Salida | 7,160 | May 29 | Jun 12 | Sep 20 | 112 |
| San Luis 1 S | 7,943 | May 31 | Jun 14 | Sep 23 | 115 |
| Sedgwick 5 S | 3,996 | May 6 | May 18 | Oct 7 | 152 |
| Seibert | 4,706 | May 4 | May 17 | Oct 11 | 158 |
| Shaw 4ENE | 5,000 | May 12 | May 26 | Oct 4 | 143 |
| Sheep Mtn | 7,744 | May 27 | Jun 10 | Sep 25 | 119 |
| Sheridan Lake | 4,070 | Apr 27 | May 10 | Oct 15 | 170 |
| Sheridan Lake 4E | 4,039 | Apr 28 | May 12 | Oct 13 | 167 |
| Shoshone | 5,992 | May 1 | May 14 | Oct 14 | 164 |
| Springfield Comanche | 4,383 | May 3 | May 17 | Oct 10 | 158 |
| Steamboat Springs | 6,866 | Jun 9 | Jun 24 | Sep 12 | 93 |
| Sterling | 3,974 | Apr 30 | May 12 | Oct 9 | 161 |
| Stratton | 4,399 | May 6 | May 17 | Oct 9 | 155 |
| Strontia Springs Dam | 5,840 | May 16 | Jun 6 | Sep 29 | 132 |
| Tacony 13 SE | 4,882 | May 5 | May 16 | Oct 6 | 153 |
| Taylor Park | 9,179 | Jun 20 | Jul 2 | Sep 8 | 80 |
| Trinidad | 6,030 | Apr 30 | May 11 | Oct 15 | 167 |
| Trinidad Lake | 6,310 | May 11 | May 25 | Oct 4 | 145 |
| Trinidad Perry Stokes Airport | 5,741 | May 4 | May 19 | Oct 9 | 156 |
| Twin Lakes Rsvr | 9,236 | Jun 16 | Jun 29 | Sep 10 | 85 |
| Uravan | 5,021 | Apr 26 | May 8 | Oct 18 | 174 |
| Vail | 8,304 | Jun 21 | Jul 9 | Sep 7 | 77 |
| Vallecito Dam | 7,644 | May 31 | Jun 14 | Sep 26 | 119 |
| Vallecito Reservoir | 7,673 | May 18 | Jun 6 | Oct 11 | 145 |
| Virginia Dale 7 ENE | 7,015 | May 31 | Jun 15 | Sep 19 | 110 |
| Walsenburg 1 NW | 6,292 | May 6 | May 20 | Oct 4 | 149 |
| Walsh 1 W | 3,978 | Apr 30 | May 12 | Oct 14 | 166 |
| Waterdale | 5,230 | May 12 | May 30 | Oct 1 | 141 |
| Waverly 1W | 7,603 | Jun 6 | Jun 22 | Sep 15 | 100 |
| Westcliffe | 7,873 | Jun 11 | Jun 28 | Sep 9 | 89 |
| Wfo Pueblo | 4,653 | Apr 30 | May 12 | Oct 9 | 162 |
| Wheat Ridge 2 | 5,398 | May 5 | May 18 | Oct 5 | 151 |
| Wild Horse 6N | 4,654 | May 4 | May 17 | Oct 8 | 155 |
| Williams Fork Dam | 7,618 | Jun 12 | Jun 25 | Sep 10 | 89 |
| Woodrow 6NNE | 4,374 | May 15 | May 28 | Oct 1 | 140 |
| Wray | 3,553 | May 7 | May 19 | Oct 6 | 151 |
| Yampa | 7,857 | Jun 14 | Jun 28 | Sep 11 | 89 |
| Yellow Jacket 2W | 6,933 | May 17 | Jun 4 | Oct 9 | 145 |
| Yellow Jacket 4NE | 7,090 | May 15 | May 31 | Oct 8 | 147 |
| Yuma | 4,134 | May 1 | May 13 | Oct 12 | 164 |
No station matches that name. Try a nearby town, or look up your ZIP code above.
Last frost and first frost are averages (a 50% chance of frost later in spring or earlier in fall). Safer date is the spring date with only a 10% chance of a later frost.
Using these dates
Plant hardy crops like peas and spinach several weeks before your last frost, and tender crops like tomatoes and peppers after it, once nights stay above 50°F. The Seed Starting Calculator turns your frost date into sowing and planting dates, and When to Plant Tomatoes explains the timing in detail.
Data: NOAA National Centers for Environmental Information, U.S. Climate Normals 1991–2020, 32°F threshold.
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