| 2023 Hardiness Zone: | Zone 6a: -10°F to -5°F Zone 5a: -20°F to -15°F Zone 3b: -35°F to -30°F Zone 4a: -30°F to -25°F Zone 4b: -25°F to -20°F Zone 5b: -15°F to -10°F |
| 2012 Hardiness Zone: | Zone 3b: -35°F to -30°F Zone 5b: -15°F to -10°F Zone 4b: -25°F to -20°F Zone 5a: -20°F to -15°F Zone 4a: -30°F to -25°F |
| 1990 Hardiness Zone: | Zone 4a: -30F to -25F |
| Average First Frost Date: | July 21 - July 31 |
| Average Last Frost Date: | Jul. 1 - Jul. 10 |
| Koppen-Geiger Climate Zone: | Dfc - Subarctic With Cool Summers And Year Around Rainfall |
| Ecoregion: | 21i - Sagebrush Parks |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 80446 - Granby, CO | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 1 | 2 | 10 | 19 | 28 | 35 | 41 | 39 | 32 | 23 | 13 | 4 | 21 |
| Avg Max Temp (°F) | 27 | 32 | 39 | 47 | 59 | 69 | 76 | 74 | 66 | 56 | 41 | 29 | 51 |
| Avg Precip (In.) | .87 | .74 | .82 | 1.07 | 1.53 | 1.19 | 1.55 | 1.52 | 1.26 | 1.02 | .91 | .45 | 12.93 |