| 2023 Hardiness Zone: | Zone 6a: -10°F to -5°F |
| 2012 Hardiness Zone: | Zone 6a: -10°F to -5°F 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: | Dfa - Humid Continental Hot Summers |
| Ecoregion: | 25d - Flat to Rolling Plains |
| Heat Zone Days: | 31 - 45 days Over 86°F |
Annual Climate Data for ZIP Code 80219 - Denver, CO | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 17 | 20 | 26 | 33 | 43 | 52 | 57 | 56 | 47 | 35 | 25 | 18 | 36 |
| Avg Max Temp (°F) | 44 | 48 | 53 | 60 | 70 | 80 | 86 | 84 | 76 | 65 | 52 | 45 | 64 |
| Avg Precip (In.) | .58 | .57 | 1.42 | 2.27 | 2.59 | 1.95 | 1.74 | 1.79 | 1.22 | 1.09 | 1.05 | .7 | 16.97 |