| 2023 Hardiness Zone: | Zone 5a: -20°F to -15°F Zone 4b: -25°F to -20°F Zone 6a: -10°F to -5°F Zone 5b: -15°F to -10°F |
| 2012 Hardiness Zone: | Zone 5a: -20°F to -15°F Zone 4b: -25°F to -20°F Zone 5b: -15°F to -10°F |
| 1990 Hardiness Zone: | Zone 4b: -25F to -20F |
| Average First Frost Date: | Sep.11 - Sep. 20 |
| Average Last Frost Date: | Jun. 1 - Jun. 10 |
| Koppen-Geiger Climate Zone: | BSk - Cold Semi-Arid Climate |
| Ecoregion: | 22b - San Luis Alluvial Flats and Wetlands |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 81151 - Sanford, CO | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 0 | 7 | 18 | 24 | 33 | 41 | 47 | 45 | 37 | 26 | 14 | 2 | 24 |
| Avg Max Temp (°F) | 34 | 41 | 50 | 59 | 68 | 78 | 81 | 79 | 73 | 63 | 47 | 36 | 59 |
| Avg Precip (In.) | .26 | .25 | .44 | .48 | .76 | .49 | 1.06 | 1.44 | .98 | .65 | .5 | .33 | 7.63 |