| 2023 Hardiness Zone: | Zone 6a: -10°F to -5°F | |
| 2012 Hardiness Zone: | Zone 5b: -15°F to -10°F | |
| 1990 Hardiness Zone: | Zone 5a: -20F to -15F | |
| 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: | 31 - 45 days Over 86°F |
Annual Climate Data for ZIP Code 80236 - Denver, CO | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 17 | 20 | 26 | 34 | 42 | 52 | 57 | 56 | 46 | 35 | 24 | 17 | 35 |
| Avg Max Temp (°F) | 44 | 48 | 54 | 61 | 70 | 81 | 86 | 84 | 76 | 65 | 52 | 45 | 64 |
| Avg Precip (In.) | .58 | .57 | 1.42 | 2.3 | 2.66 | 1.93 | 1.78 | 1.72 | 1.33 | 1 | 1.06 | .68 | 17.05 |