Collinsville, Oklahoma has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 48.3 °F (low) to 70.9 °F (high). Annual precipitation averages 41.9 Inches. Collinsville is located in USDA Plant Hardiness Zone 7b. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 25.6 °F | 47.7 °F | 1.72 in. |
| February | 29.0 °F | 52.6 °F | 1.9 in. |
| March | 37.9 °F | 61.6 °F | 3.21 in. |
| April | 47.1 °F | 70.8 °F | 4.48 in. |
| May | 57.7 °F | 78.3 °F | 5.88 in. |
| June | 66.9 °F | 87.0 °F | 4.95 in. |
| July | 70.9 °F | 92.4 °F | 3.84 in. |
| August | 69.2 °F | 92.3 °F | 3.57 in. |
| September | 60.8 °F | 84.4 °F | 3.81 in. |
| October | 48.6 °F | 73.3 °F | 3.51 in. |
| November | 37.2 °F | 60.8 °F | 2.85 in. |
| December | 28.8 °F | 50.1 °F | 2.2 in. |
| Annual | 48.3 °F | 70.9 °F | 41.92 in. |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 7b : 5°F to 10°F |
| Plant Hardiness Zone - 2012 | Zone 7a : 0°F to 5°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |