| 2023 Hardiness Zone: | Zone 7b: 5°F to 10°F | |
| 2012 Hardiness Zone: | Zone 7b: 5°F to 10°F | |
| 1990 Hardiness Zone: | Zone 7a: 0F to 5F | |
| Average First Frost Date: | Nov. 1 - Nov. 10 | |
| Average Last Frost Date: | Apr. 11 - Apr. 20 | |
| Koppen-Geiger Climate Zone: | Cfa - Humid Subtropical Climate | |
| Ecoregion: | 63b - Chesapeake-Pamlico Lowlands and Tidal Marshes | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | 61 - 90 days Over 86°F |
Annual Climate Data for ZIP Code 22448 - Dahlgren, VA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 26 | 29 | 36 | 44 | 54 | 63 | 68 | 66 | 60 | 48 | 39 | 31 | 47 |
| Avg Max Temp (°F) | 46 | 50 | 59 | 69 | 77 | 85 | 89 | 87 | 81 | 71 | 60 | 50 | 69 |
| Avg Precip (In.) | 3.52 | 2.99 | 4.02 | 3.11 | 4.28 | 3.61 | 4.37 | 3.81 | 3.94 | 3.34 | 3.12 | 3.26 | 43.37 |