Boerne, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 12.5 °C (low) to 25.5 °C (high). Annual precipitation averages 945.1 Millimeters. Boerne is located in USDA Plant Hardiness Zone 8b. The growing season typically runs from the last frost around Mar. 11 - Mar. 20 through the first frost around Nov. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 2.4 °C | 16 °C | 56.39 mm |
| February | 4.6 °C | 18.3 °C | 52.83 mm |
| March | 8.4 °C | 21.8 °C | 70.36 mm |
| April | 12.1 °C | 25.6 °C | 64.77 mm |
| May | 16.9 °C | 28.8 °C | 127.25 mm |
| June | 20.4 °C | 32.2 °C | 97.28 mm |
| July | 21.6 °C | 33.8 °C | 66.04 mm |
| August | 21.3 °C | 34.4 °C | 68.83 mm |
| September | 18.2 °C | 31.2 °C | 103.89 mm |
| October | 13.1 °C | 26.6 °C | 103.89 mm |
| November | 7.5 °C | 20.8 °C | 74.17 mm |
| December | 3.4 °C | 16.7 °C | 59.44 mm |
| Annual | 12.5 °C | 25.5 °C | 945.14 mm |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 11 - Mar. 20 |
| Average Days With Frost | 30-40 Days |
| Plant Hardiness Zone | Zone 8b : -9.4°C to -6.7°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 |