Boerne, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 54.5 °F (low) to 77.9 °F (high). Annual precipitation averages 37.2 Inches. 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 | 36.4 °F | 60.8 °F | 2.22 in. |
| February | 40.2 °F | 65.0 °F | 2.08 in. |
| March | 47.1 °F | 71.3 °F | 2.77 in. |
| April | 53.7 °F | 78.0 °F | 2.55 in. |
| May | 62.5 °F | 83.9 °F | 5.01 in. |
| June | 68.8 °F | 90.0 °F | 3.83 in. |
| July | 70.8 °F | 92.8 °F | 2.6 in. |
| August | 70.4 °F | 93.9 °F | 2.71 in. |
| September | 64.8 °F | 88.1 °F | 4.09 in. |
| October | 55.6 °F | 79.8 °F | 4.09 in. |
| November | 45.5 °F | 69.4 °F | 2.92 in. |
| December | 38.1 °F | 62.0 °F | 2.34 in. |
| Annual | 54.5 °F | 77.9 °F | 37.21 in. |
| 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 : 15°F to 20°F |
| Plant Hardiness Zone - 2012 | Zone 8b : 15°F to 20°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |