Dayton, Virginia has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 42.3 °F (low) to 65.5 °F (high). Annual precipitation averages 38 Inches. Dayton is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 22.7 °F | 43.2 °F | 2.54 in. |
| February | 24.7 °F | 46.5 °F | 2.18 in. |
| March | 30.8 °F | 54.5 °F | 3.11 in. |
| April | 40.4 °F | 66.1 °F | 3.22 in. |
| May | 50.3 °F | 74.0 °F | 3.87 in. |
| June | 59.4 °F | 82.3 °F | 4.04 in. |
| July | 63.0 °F | 86.1 °F | 3.96 in. |
| August | 61.2 °F | 84.5 °F | 3.6 in. |
| September | 54.5 °F | 78.2 °F | 3.7 in. |
| October | 42.4 °F | 67.5 °F | 2.41 in. |
| November | 32.4 °F | 56.3 °F | 2.44 in. |
| December | 26.1 °F | 46.7 °F | 2.88 in. |
| Annual | 42.3 °F | 65.5 °F | 37.95 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 7a : 0°F to 5°F |
| Plant Hardiness Zone - 2012 | Zone 6b : -5°F to 0°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |