| 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: | 1 - 7 days Over 86°F |
Annual Climate Data for ZIP Code 80521 - Fort Collins, CO | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 15 | 19 | 26 | 33 | 43 | 51 | 56 | 54 | 46 | 35 | 23 | 16 | 35 |
| Avg Max Temp (°F) | 41 | 46 | 52 | 61 | 70 | 80 | 85 | 84 | 75 | 64 | 50 | 42 | 63 |
| Avg Precip (In.) | .43 | .37 | 1.38 | 2.09 | 2.65 | 1.95 | 1.84 | 1.42 | 1.37 | .95 | .81 | .48 | 15.75 |