Dinwiddie, Virginia has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 8.6 °C (low) to 21 °C (high). Annual precipitation averages 1206.2 Millimeters. Dinwiddie is located in USDA Plant Hardiness Zone 7b. 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 | -2.2 °C | 9.4 °C | 89.15 mm |
| February | -1.5 °C | 11.3 °C | 68.83 mm |
| March | 2.2 °C | 15.5 °C | 104.14 mm |
| April | 7.7 °C | 21.5 °C | 90.93 mm |
| May | 13 °C | 25.3 °C | 100.33 mm |
| June | 17.8 °C | 29.7 °C | 114.55 mm |
| July | 20.1 °C | 31.8 °C | 124.97 mm |
| August | 19.3 °C | 30.8 °C | 121.67 mm |
| September | 15.8 °C | 27.5 °C | 124.97 mm |
| October | 8.7 °C | 21.9 °C | 95.5 mm |
| November | 3 °C | 16.2 °C | 81.28 mm |
| December | -0.5 °C | 11.1 °C | 89.92 mm |
| Annual | 8.6 °C | 21 °C | 1206.24 mm |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 7b : -15°C to -12.2°C |
| Plant Hardiness Zone - 2012 | Zone 7a : -17.8°C to -15°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |