Impact, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 52.1 °F (low) to 76.9 °F (high). Annual precipitation averages 26 Inches. Impact is located in USDA Plant Hardiness Zone 8a. The growing season typically runs from the last frost around Mar. 21 - Mar. 31 through the first frost around Nov. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 31.7 °F | 57.1 °F | 1.03 in. |
| February | 35.3 °F | 61.1 °F | 1.51 in. |
| March | 42.9 °F | 69.2 °F | 2.02 in. |
| April | 50.6 °F | 77.4 °F | 1.9 in. |
| May | 60.6 °F | 84.7 °F | 3.29 in. |
| June | 68.7 °F | 91.4 °F | 3.39 in. |
| July | 72.2 °F | 95.3 °F | 1.96 in. |
| August | 71.4 °F | 95.2 °F | 2.45 in. |
| September | 63.8 °F | 87.7 °F | 2.99 in. |
| October | 53.0 °F | 78.5 °F | 2.63 in. |
| November | 41.7 °F | 66.6 °F | 1.58 in. |
| December | 33.6 °F | 58.2 °F | 1.29 in. |
| Annual | 52.1 °F | 76.9 °F | 26.04 in. |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| Average Days With Frost | 40-50 Days |
| Plant Hardiness Zone | Zone 8a : 10°F to 15°F |
| Plant Hardiness Zone - 2012 | Zone 8a : 10°F to 15°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |