Denham Springs, Louisiana has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 57.3 °F (low) to 78.4 °F (high). Annual precipitation averages 65.6 Inches. Denham Springs is located in USDA Plant Hardiness Zone 9a. The growing season typically runs from the last frost around Feb. 1 - Feb. 10 through the first frost around Dec. 11 - Dec. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 40.8 °F | 61.9 °F | 6.12 in. |
| February | 44.1 °F | 65.9 °F | 4.93 in. |
| March | 50.2 °F | 72.5 °F | 4.78 in. |
| April | 56.3 °F | 78.5 °F | 5.12 in. |
| May | 64.4 °F | 85.2 °F | 5.89 in. |
| June | 70.8 °F | 89.8 °F | 6.73 in. |
| July | 73.0 °F | 91.4 °F | 6.1 in. |
| August | 72.5 °F | 91.9 °F | 6.87 in. |
| September | 68.2 °F | 88.4 °F | 4.71 in. |
| October | 57.4 °F | 80.7 °F | 4.83 in. |
| November | 47.4 °F | 70.8 °F | 4.16 in. |
| December | 42.5 °F | 64.1 °F | 5.34 in. |
| Annual | 57.3 °F | 78.4 °F | 65.58 in. |
| Average First Frost Date | Dec. 11 - Dec. 20 |
| Average Last Frost Date | Feb. 1 - Feb. 10 |
| Average Days With Frost | 10-20 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 |