| 2023 Hardiness Zone: | Zone 7b: 5°F to 10°F | |
| 2012 Hardiness Zone: | Zone 7b: 5°F to 10°F Zone 7a: 0°F to 5°F | |
| 1990 Hardiness Zone: | Zone 7a: 0F to 5F | |
| Average First Frost Date: | Nov. 1 - Nov. 10 | |
| Average Last Frost Date: | Apr. 1 - Apr. 10 | |
| Koppen-Geiger Climate Zone: | Cfa - Humid Subtropical Climate | |
| Ecoregion: | 65m - Rolling Coastal Plain | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | 31 - 45 days Over 86°F |
Annual Climate Data for ZIP Code 22026 - Dumfries, VA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 26 | 28 | 36 | 44 | 54 | 63 | 68 | 66 | 59 | 47 | 37 | 30 | 46 |
| Avg Max Temp (°F) | 44 | 47 | 56 | 67 | 76 | 84 | 87 | 86 | 79 | 69 | 58 | 48 | 67 |
| Avg Precip (In.) | 3.39 | 2.83 | 3.79 | 3.16 | 4.09 | 3.65 | 4 | 3.83 | 4.07 | 3.44 | 3.3 | 3.21 | 42.76 |