Madill, Oklahoma has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 51.4 °F (low) to 74.1 °F (high). Annual precipitation averages 41.6 Inches. Madill 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 | 30.2 °F | 52.6 °F | 2.22 in. |
| February | 33.9 °F | 56.9 °F | 2.31 in. |
| March | 41.9 °F | 65.3 °F | 3.29 in. |
| April | 49.8 °F | 73.9 °F | 3.75 in. |
| May | 59.7 °F | 80.6 °F | 5.78 in. |
| June | 68.5 °F | 89.1 °F | 4.75 in. |
| July | 72.3 °F | 94.2 °F | 2.72 in. |
| August | 71.2 °F | 94.4 °F | 2.68 in. |
| September | 63.7 °F | 87.0 °F | 4.01 in. |
| October | 51.7 °F | 76.2 °F | 4.3 in. |
| November | 41.2 °F | 64.5 °F | 2.79 in. |
| December | 32.4 °F | 54.4 °F | 3.0 in. |
| Annual | 51.4 °F | 74.1 °F | 41.6 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 |