San Leanna, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 56.6 °F (low) to 79.1 °F (high). Annual precipitation averages 37.9 Inches. San Leanna is located in USDA Plant Hardiness Zone 9a. The growing season typically runs from the last frost around Feb. 21 - Feb. 29 through the first frost around Nov. 21 - Nov. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 38.3 °F | 61.5 °F | 2.69 in. |
| February | 42.1 °F | 64.9 °F | 2.09 in. |
| March | 48.9 °F | 71.7 °F | 3.04 in. |
| April | 55.7 °F | 78.5 °F | 2.62 in. |
| May | 64.6 °F | 85.2 °F | 5.13 in. |
| June | 71.0 °F | 91.6 °F | 3.58 in. |
| July | 73.0 °F | 94.8 °F | 2.4 in. |
| August | 72.8 °F | 96.3 °F | 2.52 in. |
| September | 67.5 °F | 90.2 °F | 3.63 in. |
| October | 57.5 °F | 81.4 °F | 4.32 in. |
| November | 47.5 °F | 70.6 °F | 2.91 in. |
| December | 39.7 °F | 62.8 °F | 2.97 in. |
| Annual | 56.6 °F | 79.1 °F | 37.9 in. |
| Average First Frost Date | Nov. 21 - Nov. 30 |
| Average Last Frost Date | Feb. 21 - Feb. 29 |
| Average Days With Frost | 10-20 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 | Severe Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |