Weems, Virginia has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 9.8 °C (low) to 20 °C (high). Annual precipitation averages 1229.9 Millimeters. Weems is located in USDA Plant Hardiness Zone 8a. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -1.2 °C | 8.4 °C | 87.63 mm |
| February | -0.7 °C | 9.8 °C | 71.37 mm |
| March | 2.9 °C | 13.8 °C | 109.47 mm |
| April | 8.3 °C | 19.9 °C | 88.9 mm |
| May | 13.8 °C | 24.2 °C | 98.55 mm |
| June | 18.7 °C | 28.6 °C | 109.98 mm |
| July | 21.2 °C | 31.1 °C | 127 mm |
| August | 20.3 °C | 29.8 °C | 131.83 mm |
| September | 17.4 °C | 26.8 °C | 125.98 mm |
| October | 11.1 °C | 21.3 °C | 107.44 mm |
| November | 5.2 °C | 15.4 °C | 77.22 mm |
| December | 1 °C | 10.7 °C | 94.49 mm |
| Annual | 9.8 °C | 20 °C | 1229.86 mm |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 50-75 Days |
| Plant Hardiness Zone | Zone 8a : -12.2°C to -9.4°C |
| Plant Hardiness Zone - 2012 | Zone 7b : -15°C to -12.2°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |