Madisonville, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 56.2 °F (low) to 78.9 °F (high). Annual precipitation averages 46.4 Inches. 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 | 38.0 °F | 60.6 °F | 4.11 in. |
| February | 42.0 °F | 64.7 °F | 3.34 in. |
| March | 48.1 °F | 71.4 °F | 3.51 in. |
| April | 55.3 °F | 78.5 °F | 3.41 in. |
| May | 64.2 °F | 84.9 °F | 5.09 in. |
| June | 70.9 °F | 91.3 °F | 4.12 in. |
| July | 73.1 °F | 94.4 °F | 3.1 in. |
| August | 72.7 °F | 95.8 °F | 3.12 in. |
| September | 67.0 °F | 90.4 °F | 4.13 in. |
| October | 56.3 °F | 81.7 °F | 4.1 in. |
| November | 46.7 °F | 70.4 °F | 4.15 in. |
| December | 40.0 °F | 62.3 °F | 4.2 in. |
| Annual | 56.2 °F | 78.9 °F | 46.38 in. |
| 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 : 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 |