Forest Hill, Louisiana has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 55.6 °F (low) to 77.6 °F (high). Annual precipitation averages 60.8 Inches. Forest Hill 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 | 37.9 °F | 59.2 °F | 6.22 in. |
| February | 41.3 °F | 63.6 °F | 5.07 in. |
| March | 48.1 °F | 71.0 °F | 4.64 in. |
| April | 54.9 °F | 77.7 °F | 5.25 in. |
| May | 63.5 °F | 84.8 °F | 4.84 in. |
| June | 70.0 °F | 90.2 °F | 5.11 in. |
| July | 72.4 °F | 92.4 °F | 4.76 in. |
| August | 71.8 °F | 93.2 °F | 4.36 in. |
| September | 66.5 °F | 88.5 °F | 4.45 in. |
| October | 55.2 °F | 79.8 °F | 4.77 in. |
| November | 45.4 °F | 69.1 °F | 5.56 in. |
| December | 40.0 °F | 61.3 °F | 5.79 in. |
| Annual | 55.6 °F | 77.6 °F | 60.82 in. |
| 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 : 20°F to 25°F |
| Plant Hardiness Zone - 2012 | Zone 8b : 15°F to 20°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |