Collinsville, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 52.8 °F (low) to 74.7 °F (high). Annual precipitation averages 40.7 Inches. Collinsville is located in USDA Plant Hardiness Zone 8a. 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 | 31.9 °F | 53.6 °F | 2.24 in. |
| February | 35.5 °F | 58.0 °F | 2.71 in. |
| March | 43.1 °F | 65.8 °F | 3.61 in. |
| April | 51.1 °F | 74.0 °F | 3.65 in. |
| May | 60.8 °F | 81.2 °F | 5.24 in. |
| June | 69.5 °F | 89.7 °F | 4.06 in. |
| July | 73.5 °F | 94.7 °F | 2.53 in. |
| August | 72.7 °F | 95.1 °F | 2.6 in. |
| September | 65.2 °F | 87.5 °F | 3.47 in. |
| October | 53.6 °F | 76.9 °F | 4.48 in. |
| November | 42.8 °F | 64.9 °F | 3.01 in. |
| December | 34.1 °F | 55.5 °F | 3.08 in. |
| Annual | 52.8 °F | 74.7 °F | 40.68 in. |
| 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 8a : 10°F to 15°F |
| Plant Hardiness Zone - 2012 | Zone 8a : 10°F to 15°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |