| 2023 Hardiness Zone: | Zone 5a: -20°F to -15°F Zone 5b: -15°F to -10°F | |
| 2012 Hardiness Zone: | Zone 5b: -15°F to -10°F | |
| 1990 Hardiness Zone: | Zone 1b: -15F to -10F | |
| Average First Frost Date: | Oct. 1 - Oct. 10 | |
| Average Last Frost Date: | May 11 - May 20 | |
| Koppen-Geiger Climate Zone: | BSk - Cold Semi-Arid Climate | |
| Ecoregion: | 25d - Flat to Rolling Plains | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | 61 - 90 days Over 86°F |
Annual Climate Data for ZIP Code 80620 - Evans, CO | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 14 | 20 | 27 | 35 | 45 | 53 | 59 | 57 | 47 | 36 | 25 | 16 | 36 |
| Avg Max Temp (°F) | 40 | 46 | 55 | 63 | 72 | 83 | 89 | 87 | 78 | 66 | 50 | 41 | 64 |
| Avg Precip (In.) | .51 | .36 | 1.14 | 1.77 | 2.51 | 1.81 | 1.42 | 1.19 | 1.19 | .88 | .82 | .45 | 14.04 |