Madisonville, Louisiana has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 15.8 °C (low) to 25.5 °C (high). Annual precipitation averages 1642.9 Millimeters. Madisonville is located in USDA Plant Hardiness Zone 9a. The growing season typically runs from the last frost around Feb. 11 - Feb. 20 through the first frost around Dec. 1 - Dec. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 6.1 °C | 16.5 °C | 141.73 mm |
| February | 7.9 °C | 18.6 °C | 122.17 mm |
| March | 11.7 °C | 22 °C | 132.33 mm |
| April | 15.2 °C | 25.5 °C | 128.78 mm |
| May | 19.8 °C | 29.2 °C | 133.86 mm |
| June | 23.3 °C | 31.7 °C | 168.4 mm |
| July | 23.9 °C | 32.8 °C | 182.88 mm |
| August | 24.1 °C | 32.8 °C | 171.2 mm |
| September | 21.9 °C | 30.9 °C | 123.19 mm |
| October | 16.8 °C | 26.7 °C | 102.36 mm |
| November | 10.9 °C | 21.3 °C | 104.39 mm |
| December | 7.5 °C | 17.6 °C | 131.57 mm |
| Annual | 15.8 °C | 25.5 °C | 1642.86 mm |
| Average First Frost Date | Dec. 1 - Dec. 10 |
| Average Last Frost Date | Feb. 11 - Feb. 20 |
| Average Days With Frost | 10-20 Days |
| Plant Hardiness Zone | Zone 9a : -6.7°C to -3.9°C |
| Plant Hardiness Zone - 2012 | Zone 9a : -6.7°C to -3.9°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |