Madisonville, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 13.4 °C (low) to 26 °C (high). Annual precipitation averages 1178.1 Millimeters. Madisonville is located in USDA Plant Hardiness Zone 9a. 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 | 3.3 °C | 15.9 °C | 104.39 mm |
| February | 5.6 °C | 18.2 °C | 84.84 mm |
| March | 8.9 °C | 21.9 °C | 89.15 mm |
| April | 12.9 °C | 25.8 °C | 86.61 mm |
| May | 17.9 °C | 29.4 °C | 129.29 mm |
| June | 21.6 °C | 32.9 °C | 104.65 mm |
| July | 22.8 °C | 34.7 °C | 78.74 mm |
| August | 22.6 °C | 35.4 °C | 79.25 mm |
| September | 19.4 °C | 32.4 °C | 104.9 mm |
| October | 13.5 °C | 27.6 °C | 104.14 mm |
| November | 8.2 °C | 21.3 °C | 105.41 mm |
| December | 4.4 °C | 16.8 °C | 106.68 mm |
| Annual | 13.4 °C | 26 °C | 1178.05 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 9a : -6.7°C to -3.9°C |
| Plant Hardiness Zone - 2012 | Zone 8b : -9.4°C to -6.7°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |