Belton, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 13 °C (low) to 25.7 °C (high). Annual precipitation averages 922.3 Millimeters. Belton 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 | 2.3 °C | 15.2 °C | 62.74 mm |
| February | 4.3 °C | 17.4 °C | 61.98 mm |
| March | 8.6 °C | 21.2 °C | 83.06 mm |
| April | 12.6 °C | 25.6 °C | 68.58 mm |
| May | 17.6 °C | 29.4 °C | 117.6 mm |
| June | 21.3 °C | 33.2 °C | 90.68 mm |
| July | 22.6 °C | 35.2 °C | 46.99 mm |
| August | 22.4 °C | 35.8 °C | 64.52 mm |
| September | 19.1 °C | 32.2 °C | 84.58 mm |
| October | 13.4 °C | 27.1 °C | 97.03 mm |
| November | 7.8 °C | 20.7 °C | 75.44 mm |
| December | 3.4 °C | 15.9 °C | 69.09 mm |
| Annual | 13 °C | 25.7 °C | 922.29 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 | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |