Millsap, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 53.6 °F (low) to 77.3 °F (high). Annual precipitation averages 33.5 Inches. Millsap is located in USDA Plant Hardiness Zone 8b. 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 | 33.0 °F | 57.7 °F | 1.86 in. |
| February | 36.7 °F | 61.2 °F | 2.34 in. |
| March | 44.5 °F | 69.0 °F | 3.0 in. |
| April | 52.1 °F | 77.0 °F | 2.81 in. |
| May | 62.2 °F | 83.9 °F | 4.23 in. |
| June | 70.2 °F | 91.6 °F | 3.6 in. |
| July | 73.5 °F | 96.2 °F | 1.96 in. |
| August | 72.9 °F | 96.5 °F | 2.53 in. |
| September | 65.5 °F | 89.2 °F | 2.93 in. |
| October | 54.2 °F | 79.2 °F | 3.77 in. |
| November | 43.4 °F | 67.3 °F | 2.44 in. |
| December | 34.9 °F | 58.8 °F | 2.07 in. |
| Annual | 53.6 °F | 77.3 °F | 33.54 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 8b : 15°F to 20°F |
| Plant Hardiness Zone - 2012 | Zone 8a : 10°F to 15°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |