Walnut Grove, Tennessee has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 48.1 °F (low) to 70.9 °F (high). Annual precipitation averages 58.8 Inches. Walnut Grove 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 Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 26.8 °F | 44.6 °F | 4.18 in. |
| February | 29.9 °F | 49.3 °F | 4.58 in. |
| March | 37.5 °F | 58.3 °F | 4.93 in. |
| April | 46.7 °F | 68.6 °F | 5.15 in. |
| May | 56.9 °F | 76.7 °F | 5.83 in. |
| June | 64.7 °F | 84.3 °F | 4.49 in. |
| July | 67.9 °F | 87.5 °F | 4.72 in. |
| August | 66.4 °F | 87.4 °F | 3.78 in. |
| September | 59.4 °F | 81.6 °F | 3.93 in. |
| October | 48.1 °F | 70.6 °F | 3.82 in. |
| November | 37.7 °F | 58.0 °F | 3.93 in. |
| December | 31.3 °F | 48.2 °F | 5.07 in. |
| Annual | 47.8 °F | 67.9 °F | 54.41 in. |
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 28.7 °F | 49.3 °F | 5.11 in. |
| February | 31.9 °F | 54.1 °F | 5.27 in. |
| March | 38.4 °F | 62.6 °F | 5.53 in. |
| April | 47.1 °F | 72.1 °F | 5.51 in. |
| May | 56.0 °F | 79.2 °F | 5.27 in. |
| June | 64.1 °F | 85.7 °F | 4.57 in. |
| July | 67.8 °F | 88.8 °F | 5.01 in. |
| August | 66.4 °F | 88.1 °F | 4.39 in. |
| September | 60.1 °F | 83.5 °F | 4.22 in. |
| October | 47.5 °F | 73.2 °F | 3.85 in. |
| November | 37.3 °F | 61.4 °F | 4.12 in. |
| December | 31.7 °F | 52.4 °F | 5.91 in. |
| Annual | 48.1 °F | 70.9 °F | 58.76 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 7a : 0°F to 5°F |
| Plant Hardiness Zone - 2012 | Zone 7a : 0°F to 5°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 7b : 5°F to 10°F |
| Plant Hardiness Zone - 2012 | Zone 7b : 5°F to 10°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |