Allison, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 45.5 °F (low) to 71.9 °F (high). Annual precipitation averages 23.7 Inches. Allison 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. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 24.2 °F | 50.4 °F | 0.68 in. |
| February | 26.9 °F | 53.7 °F | 0.88 in. |
| March | 35.2 °F | 63.4 °F | 1.59 in. |
| April | 43.3 °F | 71.7 °F | 2.21 in. |
| May | 53.7 °F | 80.0 °F | 3.56 in. |
| June | 63.4 °F | 88.1 °F | 3.22 in. |
| July | 67.6 °F | 93.0 °F | 2.77 in. |
| August | 66.2 °F | 92.2 °F | 2.84 in. |
| September | 58.8 °F | 84.2 °F | 2.28 in. |
| October | 45.9 °F | 73.6 °F | 1.76 in. |
| November | 34.1 °F | 61.2 °F | 1.1 in. |
| December | 26.1 °F | 51.2 °F | 0.81 in. |
| Annual | 45.5 °F | 71.9 °F | 23.7 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 7a : 0°F to 5°F |
| Plant Hardiness Zone - 2012 | Zone 7a : 0°F to 5°F |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |