Colorado · 65 stations
Colorado Frost Dates: 65 Weather Stations
65 NOAA weather stations in Colorado with at least 25 years of frost records.
| Station | Zone | Last spring frost (50%) | First fall frost (50%) | Frost-free days |
|---|---|---|---|---|
| Akron Washington County Airport, CO | 5b | May 6 | October 8 | 155 |
| Altenbern, CO | 6a | May 25 | September 25 | 120 |
| Bailey, CO | 5a | June 16 | September 8 | 84 |
| Bonny Dam 2 NE, CO | 6a | May 5 | October 10 | 155 |
| Boulder, CO | 6a | May 6 | October 5 | 151 |
| Brighton, CO | 5b | May 3 | October 7 | 155 |
| Buena Vista, CO | 5b | May 27 | September 23 | 116 |
| Burlington, CO | 6a | May 6 | October 9 | 155 |
| Byers, CO | 5b | May 13 | October 2 | 142 |
| Cabin Creek, CO | 5b | June 6 | September 19 | 103 |
| Canon City, CO | 6a | May 4 | October 7 | 153 |
| Castle Rock, CO | 5b | May 9 | October 2 | 143 |
| Cochetopa Creek, CO | 4b | June 21 | September 5 | 74 |
| Colorado Springs, CO | 6a | May 3 | October 8 | 158 |
| Cortez, CO | 6a | May 12 | October 7 | 147 |
| Eads, CO | 6a | April 30 | October 13 | 165 |
| Evergreen, CO | 5b | May 23 | September 22 | 118 |
| Fort Collins, CO | 5b | May 2 | October 7 | 157 |
| Fort Collins 4 E, CO | 5b | May 3 | October 6 | 154 |
| Georgetown, CO | 5b | May 30 | September 19 | 112 |
| Grand Junction, CO | 7a | April 23 | October 20 | 179 |
| Grand Junction (Walker Field), CO | 7a | April 28 | October 16 | 171 |
| Grant, CO | 5b | June 15 | September 9 | 84 |
| Great Sand Dunes National Park & Preserve, CO | 6a | May 21 | October 1 | 131 |
| Hayden, CO | 5a | June 1 | September 20 | 109 |
| Holyoke, CO | 5b | May 11 | October 3 | 144 |
| Hugo, CO | 5b | May 10 | October 2 | 143 |
| Joes, CO | 5b | May 3 | October 9 | 158 |
| Kim 10 SSE, CO | 6b | April 24 | October 18 | 175 |
| Kim 15 NNE, CO | 6a | May 5 | October 9 | 156 |
| Kremmling, CO | 4a | June 14 | September 5 | 80 |
| La Junta, CO | 6a | April 24 | October 15 | 173 |
| Lake George 8 SW, CO | 4b | June 2 | September 19 | 108 |
| Lamar, CO | 6a | April 30 | October 10 | 163 |
| Las Animas, CO | 6a | April 29 | October 12 | 166 |
| Leroy, CO | 5b | May 10 | October 6 | 147 |
| Loveland, CO | 5b | May 10 | October 1 | 142 |
| Maybell, CO | 4a | June 16 | September 9 | 83 |
| Meeker, CO | 4b | June 4 | September 16 | 104 |
| Monte Vista, CO | 5a | June 11 | September 13 | 92 |
| New Raymer, CO | 5a | May 18 | September 29 | 133 |
| Northglenn, CO | 6a | May 2 | October 11 | 160 |
| Palisade, CO | 7a | April 17 | October 26 | 190 |
| Paonia, CO | 6b | May 3 | October 12 | 159 |
| Pueblo, CO | 5b | April 30 | October 9 | 161 |
| Rangely, CO | 5a | May 15 | October 1 | 136 |
| Rustic, CO | 5b | June 5 | September 16 | 101 |
| Sedgwick, CO | 5b | May 6 | October 7 | 152 |
| Sheep Mountain, CO | 6a | May 27 | September 25 | 119 |
| Tacony, CO | 5b | May 5 | October 6 | 153 |
| Taylor Park, CO | 3b | June 20 | September 8 | 80 |
| Walsenburg, CO | 6a | May 6 | October 4 | 149 |
| Walsh, CO | 6b | April 30 | October 14 | 166 |
| Westcliffe, CO | 5a | June 11 | September 9 | 89 |
| Wheat Ridge, CO | 6a | May 5 | October 5 | 151 |
| Wray, CO | 5b | May 7 | October 6 | 151 |
| Yuma, CO | 5b | May 1 | October 12 | 164 |
| near Akron, CO | 5b | May 8 | October 6 | 149 |
| near Alamosa, CO | 4b | June 7 | September 15 | 98 |
| near Aurora, CO | 6a | May 4 | October 8 | 156 |
| near Coal Creek, CO | 5b | June 5 | September 16 | 103 |
| near Granby, CO | 4a | June 13 | September 7 | 84 |
| near Greeley, CO | 5b | May 2 | October 8 | 159 |
| near Limon, CO | 5b | May 21 | September 26 | 127 |
| near Trinidad, CO | 6a | May 4 | October 9 | 156 |