Middletown, Virginia has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 6.2 °C (low) to 18.4 °C (high). Annual precipitation averages 1018.8 Millimeters. Middletown is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -4.8 °C | 5.7 °C | 66.8 mm |
| February | -3.9 °C | 7.6 °C | 55.63 mm |
| March | -0.3 °C | 12.1 °C | 81.79 mm |
| April | 5.2 °C | 18.7 °C | 85.6 mm |
| May | 10.4 °C | 23.3 °C | 104.65 mm |
| June | 15.4 °C | 27.9 °C | 121.67 mm |
| July | 17.8 °C | 30.4 °C | 95.25 mm |
| August | 16.9 °C | 29.4 °C | 80.01 mm |
| September | 12.8 °C | 25.7 °C | 109.47 mm |
| October | 6.3 °C | 19.5 °C | 78.49 mm |
| November | 1 °C | 13.2 °C | 68.58 mm |
| December | -2.7 °C | 7.7 °C | 70.87 mm |
| Annual | 6.2 °C | 18.4 °C | 1018.81 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| 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 | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |