| 2023 Hardiness Zone: | 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: | 64a - Triassic Lowlands | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | 46 - 60 days Over 86°F |
Annual Climate Data for ZIP Code 20110 - Manassas, VA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 24 | 26 | 33 | 42 | 52 | 60 | 66 | 64 | 57 | 44 | 36 | 28 | 44 |
| Avg Max Temp (°F) | 44 | 48 | 57 | 68 | 76 | 84 | 88 | 87 | 80 | 70 | 58 | 48 | 67 |
| Avg Precip (In.) | 3.11 | 2.52 | 3.17 | 3.03 | 3.9 | 3.42 | 3.29 | 3.31 | 3.9 | 3.26 | 3.17 | 2.86 | 38.94 |