| 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: | Sep. 21 - Sep. 30 |
| Average Last Frost Date: | May 21 - May 31 |
| Koppen-Geiger Climate Zone: | BSk - Cold Semi-Arid Climate |
| Ecoregion: | 25c - Moderate Relief Plains |
| Heat Zone Days: | 31 - 45 days Over 86°F |
Annual Climate Data for ZIP Code 80124 - Lone Tree, CO | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 14 | 18 | 24 | 31 | 40 | 50 | 55 | 54 | 45 | 33 | 22 | 15 | 34 |
| Avg Max Temp (°F) | 44 | 47 | 54 | 61 | 70 | 81 | 87 | 85 | 77 | 66 | 52 | 45 | 64 |
| Avg Precip (In.) | .54 | .55 | 1.53 | 2.25 | 2.79 | 1.9 | 2.01 | 1.94 | 1.4 | 1.07 | 1.16 | .69 | 17.83 |