Belton, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 55.3 °F (low) to 78.3 °F (high). Annual precipitation averages 36.3 Inches. 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 | 36.1 °F | 59.3 °F | 2.47 in. |
| February | 39.8 °F | 63.3 °F | 2.44 in. |
| March | 47.5 °F | 70.1 °F | 3.27 in. |
| April | 54.7 °F | 78.0 °F | 2.7 in. |
| May | 63.7 °F | 85.0 °F | 4.63 in. |
| June | 70.3 °F | 91.7 °F | 3.57 in. |
| July | 72.6 °F | 95.4 °F | 1.85 in. |
| August | 72.3 °F | 96.4 °F | 2.54 in. |
| September | 66.4 °F | 90.0 °F | 3.33 in. |
| October | 56.1 °F | 80.7 °F | 3.82 in. |
| November | 46.1 °F | 69.2 °F | 2.97 in. |
| December | 38.2 °F | 60.7 °F | 2.72 in. |
| Annual | 55.3 °F | 78.3 °F | 36.31 in. |
| 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 : 15°F to 20°F |
| Plant Hardiness Zone - 2012 | Zone 8b : 15°F to 20°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |