Hiwassee, Virginia has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 42.1 °F (low) to 64.3 °F (high). Annual precipitation averages 39.9 Inches. Hiwassee 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 | 23.7 °F | 42.8 °F | 3.09 in. |
| February | 25.7 °F | 46.4 °F | 2.54 in. |
| March | 31.8 °F | 54.5 °F | 3.28 in. |
| April | 40.4 °F | 65.1 °F | 3.38 in. |
| May | 49.5 °F | 73.1 °F | 4.02 in. |
| June | 57.6 °F | 79.9 °F | 4.29 in. |
| July | 61.5 °F | 83.2 °F | 4.17 in. |
| August | 60.3 °F | 82.0 °F | 3.51 in. |
| September | 53.6 °F | 76.4 °F | 3.44 in. |
| October | 41.8 °F | 66.5 °F | 2.57 in. |
| November | 32.1 °F | 55.7 °F | 2.63 in. |
| December | 26.7 °F | 46.0 °F | 2.95 in. |
| Annual | 42.1 °F | 64.3 °F | 39.87 in. |
| 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 : 0°F to 5°F |
| Plant Hardiness Zone - 2012 | Zone 6b : -5°F to 0°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |