Waller, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 14.3 °C (low) to 26.2 °C (high). Annual precipitation averages 1199.6 Millimeters. Waller 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 | 4.8 °C | 16.6 °C | 90.93 mm |
| February | 6.8 °C | 18.6 °C | 74.17 mm |
| March | 10.4 °C | 22.2 °C | 85.6 mm |
| April | 14 °C | 25.8 °C | 90.42 mm |
| May | 18.6 °C | 29.6 °C | 129.03 mm |
| June | 21.9 °C | 32.8 °C | 116.59 mm |
| July | 22.9 °C | 34.3 °C | 73.91 mm |
| August | 22.6 °C | 35.1 °C | 100.33 mm |
| September | 20.1 °C | 32.2 °C | 114.55 mm |
| October | 14.6 °C | 27.7 °C | 119.38 mm |
| November | 9.4 °C | 21.9 °C | 111 mm |
| December | 5.7 °C | 17.6 °C | 93.73 mm |
| Annual | 14.3 °C | 26.2 °C | 1199.64 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 9a : -6.7°C to -3.9°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 |