Coleman, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 11.1 °C (low) to 25.4 °C (high). Annual precipitation averages 705.3 Millimeters. Coleman is located in USDA Plant Hardiness Zone 8b. The growing season typically runs from the last frost around Mar. 11 - Mar. 20 through the first frost around Nov. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 0.2 °C | 14.8 °C | 32 mm |
| February | 2.4 °C | 17.2 °C | 45.72 mm |
| March | 6.6 °C | 21.2 °C | 56.39 mm |
| April | 10.3 °C | 25.9 °C | 46.99 mm |
| May | 15.7 °C | 29.7 °C | 92.71 mm |
| June | 19.8 °C | 33.2 °C | 95.5 mm |
| July | 21.4 °C | 35.2 °C | 56.13 mm |
| August | 21.3 °C | 35.2 °C | 60.96 mm |
| September | 17.4 °C | 31.4 °C | 65.53 mm |
| October | 11.3 °C | 26.3 °C | 68.07 mm |
| November | 5.4 °C | 19.8 °C | 50.29 mm |
| December | 1.2 °C | 15.4 °C | 35.05 mm |
| Annual | 11.1 °C | 25.4 °C | 705.34 mm |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 11 - Mar. 20 |
| Average Days With Frost | 40-50 Days |
| Plant Hardiness Zone | Zone 8b : -9.4°C to -6.7°C |
| Plant Hardiness Zone - 2012 | Zone 8a : -12.2°C to -9.4°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |