Coleman, Oklahoma has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 50.6 °F (low) to 73.6 °F (high). Annual precipitation averages 42.3 Inches. Coleman is located in USDA Plant Hardiness Zone 8a. 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 | 29.5 °F | 52.1 °F | 2.35 in. |
| February | 33.2 °F | 56.4 °F | 2.45 in. |
| March | 41.3 °F | 64.7 °F | 3.7 in. |
| April | 49.1 °F | 72.6 °F | 4.3 in. |
| May | 59.1 °F | 79.9 °F | 5.75 in. |
| June | 67.6 °F | 88.3 °F | 4.24 in. |
| July | 71.1 °F | 93.9 °F | 2.8 in. |
| August | 70.1 °F | 94.2 °F | 2.34 in. |
| September | 62.9 °F | 87.0 °F | 3.8 in. |
| October | 50.9 °F | 75.4 °F | 4.67 in. |
| November | 40.4 °F | 64.4 °F | 2.96 in. |
| December | 31.6 °F | 54.0 °F | 2.96 in. |
| Annual | 50.6 °F | 73.6 °F | 42.32 in. |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| Average Days With Frost | 50-75 Days |
| Plant Hardiness Zone | Zone 8a : 10°F to 15°F |
| Plant Hardiness Zone - 2012 | Zone 7b : 5°F to 10°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |