Kerrville, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 11.6 °C (low) to 25.5 °C (high). Annual precipitation averages 794.5 Millimeters. Kerrville is located in USDA Plant Hardiness Zone 8b. The growing season typically runs from the last frost around Mar. 21 - Mar. 31 through the first frost around Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 1.1 °C | 15.8 °C | 45.21 mm |
| February | 3.2 °C | 18.1 °C | 44.96 mm |
| March | 7.4 °C | 21.8 °C | 67.06 mm |
| April | 11.1 °C | 25.6 °C | 59.69 mm |
| May | 16.3 °C | 28.8 °C | 114.3 mm |
| June | 19.9 °C | 32.3 °C | 83.06 mm |
| July | 21.2 °C | 33.9 °C | 54.61 mm |
| August | 20.8 °C | 34.6 °C | 58.67 mm |
| September | 17.5 °C | 31.2 °C | 84.07 mm |
| October | 12.1 °C | 26.4 °C | 77.22 mm |
| November | 6.3 °C | 20.5 °C | 56.9 mm |
| December | 1.9 °C | 16.4 °C | 48.77 mm |
| Annual | 11.6 °C | 25.5 °C | 794.52 mm |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| Average Days With Frost | 40-50 Days |
| Plant Hardiness Zone | Zone 8b : -9.4°C to -6.7°C |
| Plant Hardiness Zone - 2012 | Zone 8a : -12.2°C to -9.4°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |