| 2023 Hardiness Zone: | Zone 6a: -10°F to -5°F Zone 5b: -15°F to -10°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: | 26j - Foothill Grasslands |
| Heat Zone Days: | 15 - 30 days Over 86°F |
Annual Climate Data for ZIP Code 80134 - Parker, CO | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 16 | 19 | 24 | 31 | 40 | 49 | 56 | 54 | 46 | 34 | 23 | 17 | 34 |
| Avg Max Temp (°F) | 44 | 47 | 53 | 60 | 69 | 80 | 86 | 84 | 76 | 66 | 51 | 44 | 63 |
| Avg Precip (In.) | .37 | .39 | 1.17 | 1.71 | 2.57 | 1.91 | 2.21 | 2.01 | 1.22 | .86 | .92 | .48 | 15.8 |