| 2023 Hardiness Zone: | Zone 5b: -15°F to -10°F | |
| 2012 Hardiness Zone: | Zone 5a: -20°F to -15°F 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: | 1 - 7 days Over 86°F |
Annual Climate Data for ZIP Code 80524 - Fort Collins, CO | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 15 | 19 | 26 | 34 | 43 | 51 | 57 | 55 | 46 | 35 | 23 | 16 | 35 |
| Avg Max Temp (°F) | 41 | 46 | 53 | 61 | 70 | 80 | 86 | 84 | 76 | 64 | 50 | 42 | 63 |
| Avg Precip (In.) | .43 | .37 | 1.35 | 2.01 | 2.57 | 1.91 | 1.79 | 1.36 | 1.33 | .94 | .79 | .47 | 15.34 |