Alexandria, Tennessee has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 8.4 °C (low) to 21 °C (high). Annual precipitation averages 1431 Millimeters. Alexandria is located in USDA Plant Hardiness Zone 7b. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -2.5 °C | 8.4 °C | 123.19 mm |
| February | -1.1 °C | 10.9 °C | 126.75 mm |
| March | 2.7 °C | 15.8 °C | 133.1 mm |
| April | 7.5 °C | 21.3 °C | 121.92 mm |
| May | 13 °C | 25.8 °C | 126.49 mm |
| June | 17.6 °C | 29.8 °C | 130.56 mm |
| July | 19.8 °C | 31.6 °C | 136.14 mm |
| August | 18.8 °C | 31.2 °C | 99.31 mm |
| September | 14.8 °C | 28.3 °C | 99.82 mm |
| October | 8.1 °C | 22.4 °C | 88.39 mm |
| November | 2.3 °C | 15.7 °C | 96.27 mm |
| December | -0.6 °C | 10.3 °C | 149.1 mm |
| Annual | 8.4 °C | 21 °C | 1431.04 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 | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |