Overton, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 54.7 °F (low) to 76.6 °F (high). Annual precipitation averages 47.7 Inches. Overton is located in USDA Plant Hardiness Zone 8b. The growing season typically runs from the last frost around Mar. 1 - Mar. 10 through the first frost around Nov. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 35.9 °F | 57.2 °F | 3.94 in. |
| February | 39.5 °F | 61.4 °F | 4.08 in. |
| March | 46.4 °F | 69.2 °F | 4.33 in. |
| April | 53.5 °F | 76.6 °F | 4.15 in. |
| May | 62.8 °F | 83.4 °F | 4.53 in. |
| June | 69.9 °F | 90.0 °F | 4.72 in. |
| July | 72.9 °F | 93.5 °F | 2.61 in. |
| August | 72.1 °F | 94.1 °F | 2.77 in. |
| September | 65.8 °F | 88.5 °F | 3.54 in. |
| October | 54.8 °F | 78.7 °F | 4.34 in. |
| November | 44.9 °F | 67.3 °F | 4.09 in. |
| December | 37.7 °F | 58.8 °F | 4.55 in. |
| Annual | 54.7 °F | 76.6 °F | 47.65 in. |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 1 - Mar. 10 |
| Average Days With Frost | 30-40 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 | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |