McGehee, Arkansas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 53.3 °F (low) to 74 °F (high). Annual precipitation averages 54.3 Inches. McGehee is located in USDA Plant Hardiness Zone 8b. 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 | 33.9 °F | 52.0 °F | 5.26 in. |
| February | 36.9 °F | 56.8 °F | 4.93 in. |
| March | 44.6 °F | 65.3 °F | 5.22 in. |
| April | 53.1 °F | 74.5 °F | 5.92 in. |
| May | 62.4 °F | 82.5 °F | 4.95 in. |
| June | 69.9 °F | 89.4 °F | 3.38 in. |
| July | 72.5 °F | 92.1 °F | 3.7 in. |
| August | 70.7 °F | 92.0 °F | 3.2 in. |
| September | 64.0 °F | 87.1 °F | 3.33 in. |
| October | 52.5 °F | 77.1 °F | 4.06 in. |
| November | 42.9 °F | 64.4 °F | 4.55 in. |
| December | 36.6 °F | 54.8 °F | 5.82 in. |
| Annual | 53.3 °F | 74 °F | 54.32 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 8b : 15°F to 20°F |
| Plant Hardiness Zone - 2012 | Zone 8a : 10°F to 15°F |
| Current Drought Conditions | Exceptional Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |