Dayton, Virginia has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 5.7 °C (low) to 18.6 °C (high). Annual precipitation averages 963.9 Millimeters. 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 | -5.2 °C | 6.2 °C | 64.52 mm |
| February | -4.1 °C | 8.1 °C | 55.37 mm |
| March | -0.7 °C | 12.5 °C | 78.99 mm |
| April | 4.7 °C | 18.9 °C | 81.79 mm |
| May | 10.2 °C | 23.3 °C | 98.3 mm |
| June | 15.2 °C | 27.9 °C | 102.62 mm |
| July | 17.2 °C | 30.1 °C | 100.58 mm |
| August | 16.2 °C | 29.2 °C | 91.44 mm |
| September | 12.5 °C | 25.7 °C | 93.98 mm |
| October | 5.8 °C | 19.7 °C | 61.21 mm |
| November | 0.2 °C | 13.5 °C | 61.98 mm |
| December | -3.3 °C | 8.2 °C | 73.15 mm |
| Annual | 5.7 °C | 18.6 °C | 963.93 mm |
| 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 : -17.8°C to -15°C |
| Plant Hardiness Zone - 2012 | Zone 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |