Wheeler, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 7.4 °C (low) to 22.3 °C (high). Annual precipitation averages 581.7 Millimeters. Wheeler is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -4.4 °C | 10.4 °C | 20.07 mm |
| February | -3 °C | 12.3 °C | 20.32 mm |
| March | 1.7 °C | 17.5 °C | 36.07 mm |
| April | 6.2 °C | 22.2 °C | 55.88 mm |
| May | 12.1 °C | 26.8 °C | 83.57 mm |
| June | 17.5 °C | 31.4 °C | 81.28 mm |
| July | 19.8 °C | 34.2 °C | 55.12 mm |
| August | 19.1 °C | 33.7 °C | 60.2 mm |
| September | 14.8 °C | 29.1 °C | 57.66 mm |
| October | 7.8 °C | 23.1 °C | 56.9 mm |
| November | 1.2 °C | 16.3 °C | 27.69 mm |
| December | -3.5 °C | 10.7 °C | 26.92 mm |
| Annual | 7.4 °C | 22.3 °C | 581.68 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 7a : -17.8°C to -15°C |
| Plant Hardiness Zone - 2012 | Zone 7a : -17.8°C to -15°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |