| 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. 11 - Oct. 20 | |
| 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: | 46 - 60 days Over 86°F |
Annual Climate Data for ZIP Code 20111 - Manassas, VA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 24 | 26 | 33 | 42 | 51 | 60 | 66 | 64 | 57 | 44 | 36 | 28 | 44 |
| Avg Max Temp (°F) | 43 | 47 | 57 | 68 | 76 | 84 | 88 | 86 | 80 | 70 | 58 | 47 | 67 |
| Avg Precip (In.) | 3.13 | 2.54 | 3.22 | 3.05 | 3.92 | 3.44 | 3.34 | 3.35 | 3.91 | 3.27 | 3.18 | 2.89 | 39.24 |