Alexandria, Louisiana has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 13.3 °C (low) to 25.3 °C (high). Annual precipitation averages 1517.4 Millimeters. Alexandria is located in USDA Plant Hardiness Zone 9a. The growing season typically runs from the last frost around Feb. 21 - Feb. 29 through the first frost around Nov. 21 - Nov. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 3.4 °C | 15.2 °C | 151.89 mm |
| February | 5.3 °C | 17.5 °C | 128.02 mm |
| March | 9 °C | 21.6 °C | 129.29 mm |
| April | 12.9 °C | 25.3 °C | 135.89 mm |
| May | 17.7 °C | 29.4 °C | 118.36 mm |
| June | 21.4 °C | 32.4 °C | 125.98 mm |
| July | 22.7 °C | 33.6 °C | 112.52 mm |
| August | 22.4 °C | 34.1 °C | 104.14 mm |
| September | 19.4 °C | 31.5 °C | 101.09 mm |
| October | 13.2 °C | 26.6 °C | 121.67 mm |
| November | 7.5 °C | 20.6 °C | 138.68 mm |
| December | 4.4 °C | 16.3 °C | 149.86 mm |
| Annual | 13.3 °C | 25.3 °C | 1517.39 mm |
| Average First Frost Date | Nov. 21 - Nov. 30 |
| Average Last Frost Date | Feb. 21 - Feb. 29 |
| Average Days With Frost | 20-30 Days |
| Plant Hardiness Zone | Zone 9a : -6.7°C to -3.9°C |
| Plant Hardiness Zone - 2012 | Zone 8b : -9.4°C to -6.7°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |