Madisonville, Kentucky has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 8.4 °C (low) to 20.4 °C (high). Annual precipitation averages 1279.1 Millimeters. Madisonville is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -3.3 °C | 6.7 °C | 95.76 mm |
| February | -1.7 °C | 9.3 °C | 101.85 mm |
| March | 2.7 °C | 14.6 °C | 122.68 mm |
| April | 8.1 °C | 21.1 °C | 123.95 mm |
| May | 13.7 °C | 25.7 °C | 129.79 mm |
| June | 18.3 °C | 29.8 °C | 116.08 mm |
| July | 20.1 °C | 31.5 °C | 117.09 mm |
| August | 18.9 °C | 31.5 °C | 76.2 mm |
| September | 14.7 °C | 28.6 °C | 85.09 mm |
| October | 8.4 °C | 22.2 °C | 97.28 mm |
| November | 2.5 °C | 14.7 °C | 100.08 mm |
| December | -1.2 °C | 8.7 °C | 113.28 mm |
| Annual | 8.4 °C | 20.4 °C | 1279.13 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 7a : -17.8°C to -15°C |
| Plant Hardiness Zone - 2012 | Zone 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |