Oak Grove, Tennessee has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 9.1 °C (low) to 20 °C (high). Annual precipitation averages 1361.2 Millimeters. Oak 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 | -2.8 °C | 7.9 °C | 92.71 mm |
| February | -1.4 °C | 10.3 °C | 91.69 mm |
| March | 2.2 °C | 15.1 °C | 102.62 mm |
| April | 6.9 °C | 20.7 °C | 100.58 mm |
| May | 12 °C | 25.1 °C | 94.23 mm |
| June | 16.4 °C | 28.6 °C | 94.74 mm |
| July | 18.6 °C | 30.1 °C | 123.19 mm |
| August | 17.8 °C | 29.7 °C | 106.93 mm |
| September | 14.3 °C | 27.1 °C | 75.95 mm |
| October | 7.7 °C | 21.4 °C | 61.72 mm |
| November | 1.7 °C | 15 °C | 77.22 mm |
| December | -1.2 °C | 9.7 °C | 106.93 mm |
| Annual | 7.7 °C | 20.1 °C | 1128.51 mm |
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -2.4 °C | 7.1 °C | 106.68 mm |
| February | -0.7 °C | 9.7 °C | 116.33 mm |
| March | 3.6 °C | 14.7 °C | 126.49 mm |
| April | 8.4 °C | 20.6 °C | 124.46 mm |
| May | 14.2 °C | 24.8 °C | 141.22 mm |
| June | 18.3 °C | 29 °C | 114.3 mm |
| July | 20.2 °C | 30.7 °C | 121.92 mm |
| August | 19.4 °C | 30.6 °C | 97.54 mm |
| September | 15.6 °C | 27.3 °C | 97.28 mm |
| October | 9.2 °C | 21.3 °C | 92.71 mm |
| November | 3.4 °C | 14.5 °C | 96.77 mm |
| December | 0 °C | 9.1 °C | 125.48 mm |
| Annual | 9.1 °C | 20 °C | 1361.18 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| 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 | Normal |
| 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 : -15°C to -12.2°C |
| Plant Hardiness Zone - 2012 | Zone 7a : -17.8°C to -15°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |