| 2023 Hardiness Zone: | Zone 6a: -10°F to -5°F Zone 6b: -5°F to 0°F Zone 7a: 0°F to 5°F | |
| 2012 Hardiness Zone: | Zone 6a: -10°F to -5°F Zone 6b: -5°F to 0°F Zone 7a: 0°F to 5°F | |
| 1990 Hardiness Zone: | Zone 6a: -10F to -5F | |
| Average First Frost Date: | Oct. 1 - Oct. 10 | |
| Average Last Frost Date: | May 21 - May 31 | |
| Koppen-Geiger Climate Zone: | Dfa - Humid Continental Hot Summers | |
| Ecoregion: | 20a - Monticello-Cortez Uplands | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | 46 - 60 days Over 86°F |
Annual Climate Data for ZIP Code 81321 - Cortez, CO | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 13 | 18 | 25 | 30 | 38 | 46 | 54 | 53 | 44 | 34 | 23 | 15 | 33 |
| Avg Max Temp (°F) | 40 | 45 | 52 | 61 | 71 | 82 | 87 | 85 | 78 | 66 | 51 | 42 | 63 |
| Avg Precip (In.) | 1.02 | .93 | 1.39 | .93 | 1.03 | .45 | 1.29 | 1.43 | 1.34 | 1.57 | 1.19 | .94 | 13.51 |