Forest, Louisiana has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 12.1 °C (low) to 24.2 °C (high). Annual precipitation averages 1449.6 Millimeters. Forest 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 | 1.7 °C | 12.7 °C | 142.75 mm |
| February | 3.4 °C | 15.3 °C | 130.56 mm |
| March | 7.4 °C | 19.7 °C | 130.05 mm |
| April | 11.9 °C | 24.3 °C | 154.94 mm |
| May | 16.9 °C | 28.5 °C | 124.21 mm |
| June | 20.9 °C | 32.1 °C | 99.31 mm |
| July | 22.4 °C | 33.6 °C | 102.36 mm |
| August | 21.7 °C | 33.6 °C | 102.87 mm |
| September | 18.1 °C | 31.2 °C | 87.88 mm |
| October | 11.7 °C | 25.9 °C | 117.09 mm |
| November | 6.3 °C | 19.1 °C | 115.57 mm |
| December | 3.1 °C | 14.1 °C | 141.99 mm |
| Annual | 12.1 °C | 24.2 °C | 1449.58 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 |