Powhatan, Louisiana has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 12.6 °C (low) to 25.1 °C (high). Annual precipitation averages 1429.3 Millimeters. Powhatan is located in USDA Plant Hardiness Zone 8b. The growing season typically runs from the last frost around Mar. 1 - Mar. 10 through the first frost around Nov. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 2.7 °C | 14.4 °C | 139.19 mm |
| February | 4.2 °C | 16.8 °C | 125.48 mm |
| March | 8.1 °C | 21 °C | 136.65 mm |
| April | 12.2 °C | 25.3 °C | 134.11 mm |
| May | 17 °C | 29.3 °C | 118.87 mm |
| June | 21.2 °C | 32.6 °C | 115.32 mm |
| July | 22.7 °C | 34.2 °C | 103.38 mm |
| August | 22.3 °C | 34.4 °C | 94.49 mm |
| September | 18.7 °C | 31.6 °C | 96.01 mm |
| October | 12.2 °C | 26.3 °C | 109.22 mm |
| November | 6.8 °C | 20.2 °C | 118.87 mm |
| December | 3.6 °C | 15.6 °C | 137.67 mm |
| Annual | 12.6 °C | 25.1 °C | 1429.26 mm |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 1 - Mar. 10 |
| Average Days With Frost | 30-40 Days |
| Plant Hardiness Zone | Zone 8b : -9.4°C to -6.7°C |
| Plant Hardiness Zone - 2012 | Zone 8b : -9.4°C to -6.7°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |