Leander, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 13 °C (low) to 25.8 °C (high). Annual precipitation averages 901.2 Millimeters. Leander is located in USDA Plant Hardiness Zone 8b. 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 | 2.6 °C | 15.8 °C | 60.71 mm |
| February | 4.7 °C | 17.7 °C | 53.09 mm |
| March | 8.5 °C | 21.7 °C | 74.42 mm |
| April | 12.4 °C | 25.7 °C | 70.1 mm |
| May | 17.5 °C | 29.3 °C | 111.76 mm |
| June | 21.2 °C | 32.8 °C | 85.85 mm |
| July | 22.3 °C | 34.7 °C | 65.28 mm |
| August | 22.2 °C | 35.3 °C | 61.98 mm |
| September | 19.3 °C | 31.9 °C | 85.85 mm |
| October | 13.6 °C | 27.1 °C | 96.01 mm |
| November | 7.7 °C | 20.7 °C | 71.63 mm |
| December | 3.4 °C | 16.3 °C | 64.52 mm |
| Annual | 13 °C | 25.8 °C | 901.2 mm |
| Average First Frost Date | Nov. 21 - Nov. 30 |
| Average Last Frost Date | Feb. 21 - Feb. 29 |
| Average Days With Frost | 20-30 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 | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |