| 2023 Hardiness Zone: | 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: | 25l - Front Range Fans | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | 8 - 14 days Over 86°F |
Annual Climate Data for ZIP Code 80528 - Fort Collins, CO | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 14 | 19 | 26 | 34 | 43 | 52 | 57 | 55 | 46 | 35 | 23 | 16 | 35 |
| Avg Max Temp (°F) | 41 | 47 | 53 | 62 | 71 | 82 | 87 | 85 | 77 | 65 | 50 | 43 | 64 |
| Avg Precip (In.) | .36 | .29 | 1.01 | 1.82 | 2.35 | 1.93 | 1.5 | 1.18 | 1.19 | .91 | .7 | .42 | 13.68 |