| 2023 Hardiness Zone: | Zone 6a: -10°F to -5°F Zone 6b: -5°F to 0°F | |
| 2012 Hardiness Zone: | Zone 6a: -10°F to -5°F Zone 5b: -15°F to -10°F | |
| 1990 Hardiness Zone: | Zone 1b: -15F to -10F | |
| Average First Frost Date: | Oct. 11 - Oct. 20 | |
| Average Last Frost Date: | May 1 - May 10 | |
| Koppen-Geiger Climate Zone: | BSk - Cold Semi-Arid Climate | |
| Ecoregion: | 25d - Flat to Rolling Plains | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | 91 - 120 days Over 86°F |
Annual Climate Data for ZIP Code 81047 - Holly, CO | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 13 | 18 | 26 | 36 | 46 | 57 | 62 | 60 | 50 | 36 | 23 | 15 | 37 |
| Avg Max Temp (°F) | 43 | 50 | 59 | 68 | 77 | 89 | 94 | 91 | 83 | 71 | 55 | 45 | 69 |
| Avg Precip (In.) | .34 | .38 | 1.09 | 1.28 | 2.57 | 2.45 | 2.61 | 2.84 | 1.33 | 1.09 | .67 | .32 | 16.96 |