Gwynn, Virginia has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 52.3 °F (low) to 67.5 °F (high). Annual precipitation averages 49.1 Inches. Gwynn is located in USDA Plant Hardiness Zone 8a. The growing season typically runs from the last frost around Mar. 21 - Mar. 31 through the first frost around Nov. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 32.2 °F | 47.6 °F | 3.51 in. |
| February | 33.0 °F | 49.7 °F | 3.02 in. |
| March | 38.6 °F | 56.1 °F | 4.27 in. |
| April | 48.8 °F | 66.6 °F | 3.63 in. |
| May | 58.7 °F | 74.2 °F | 3.84 in. |
| June | 68.0 °F | 82.6 °F | 4.24 in. |
| July | 72.8 °F | 86.8 °F | 5.12 in. |
| August | 71.7 °F | 85.0 °F | 5.48 in. |
| September | 66.8 °F | 79.8 °F | 4.9 in. |
| October | 55.5 °F | 70.1 °F | 4.34 in. |
| November | 44.7 °F | 59.8 °F | 3.07 in. |
| December | 36.9 °F | 52.0 °F | 3.71 in. |
| Annual | 52.3 °F | 67.5 °F | 49.13 in. |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| Average Days With Frost | 50-75 Days |
| Plant Hardiness Zone | Zone 8a : 10°F to 15°F |
| Plant Hardiness Zone - 2012 | Zone 7b : 5°F to 10°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |