| 2023 Hardiness Zone: | Zone 7b: 5°F to 10°F Zone 7a: 0°F to 5°F | |
| 2012 Hardiness Zone: | Zone 7a: 0°F to 5°F | |
| 1990 Hardiness Zone: | Zone 7a: 0F to 5F | |
| Average First Frost Date: | Oct. 21 - Oct. 31 | |
| Average Last Frost Date: | Apr. 21 - Apr. 30 | |
| Koppen-Geiger Climate Zone: | Cfa - Humid Subtropical Climate | |
| Ecoregion: | 45e - Northern Inner Piedmont | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | 31 - 45 days Over 86°F |
Annual Climate Data for ZIP Code 20124 - Clifton, VA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 23 | 25 | 33 | 41 | 51 | 60 | 65 | 64 | 57 | 44 | 35 | 28 | 44 |
| Avg Max Temp (°F) | 43 | 47 | 56 | 67 | 75 | 84 | 88 | 86 | 79 | 69 | 58 | 47 | 66 |
| Avg Precip (In.) | 3.2 | 2.67 | 3.51 | 3.16 | 4.1 | 3.6 | 3.68 | 3.63 | 4.04 | 3.36 | 3.29 | 3.04 | 41.27 |