| 2023 Hardiness Zone: | Zone 5a: -20°F to -15°F Zone 5b: -15°F to -10°F Zone 4b: -25°F to -20°F Zone 4a: -30°F to -25°F |
| 2012 Hardiness Zone: | Zone 5a: -20°F to -15°F Zone 4b: -25°F to -20°F Zone 4a: -30°F to -25°F |
| 1990 Hardiness Zone: | Zone 5a: -20F to -15F |
| Average First Frost Date: | Aug. 21 - Aug. 31 |
| Average Last Frost Date: | Jun. 21 - Jun. 30 |
| Koppen-Geiger Climate Zone: | Dfc - Subarctic With Cool Summers And Year Around Rainfall |
| Ecoregion: | 21b - Crystalline Subalpine Forests |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 80435 - Dillon, CO | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 7 | 9 | 13 | 16 | 27 | 34 | 39 | 39 | 32 | 24 | 14 | 8 | 22 |
| Avg Max Temp (°F) | 27 | 31 | 37 | 42 | 52 | 61 | 66 | 65 | 58 | 46 | 34 | 29 | 46 |
| Avg Precip (In.) | 2.06 | 2.11 | 2.4 | 2.55 | 2.36 | 1.67 | 1.99 | 2.13 | 1.53 | 1.46 | 1.86 | 2.01 | 24.12 |