Mulhall, Oklahoma has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 47.1 °F (low) to 71.8 °F (high). Annual precipitation averages 35.5 Inches. Mulhall is located in USDA Plant Hardiness Zone 7a. 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 | 24.2 °F | 49.1 °F | 1.2 in. |
| February | 27.5 °F | 52.5 °F | 1.47 in. |
| March | 36.2 °F | 62.5 °F | 2.37 in. |
| April | 45.2 °F | 71.4 °F | 3.93 in. |
| May | 56.3 °F | 79.4 °F | 5.0 in. |
| June | 66.4 °F | 88.3 °F | 4.78 in. |
| July | 70.4 °F | 93.9 °F | 3.25 in. |
| August | 68.7 °F | 93.5 °F | 3.59 in. |
| September | 60.4 °F | 85.8 °F | 3.27 in. |
| October | 47.7 °F | 73.8 °F | 3.21 in. |
| November | 36.0 °F | 61.5 °F | 1.83 in. |
| December | 26.5 °F | 50.1 °F | 1.6 in. |
| Annual | 47.1 °F | 71.8 °F | 35.5 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 7a : 0°F to 5°F |
| Plant Hardiness Zone - 2012 | Zone 7a : 0°F to 5°F |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |