Mena, Arkansas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 9.9 °C (low) to 21.9 °C (high). Annual precipitation averages 1585.5 Millimeters. Mena is located in USDA Plant Hardiness Zone 8a. 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 | -0.9 °C | 10.1 °C | 102.11 mm |
| February | 0.7 °C | 12.6 °C | 105.16 mm |
| March | 4.7 °C | 17.2 °C | 139.45 mm |
| April | 9.1 °C | 22.1 °C | 158.75 mm |
| May | 14.6 °C | 25.8 °C | 184.66 mm |
| June | 19 °C | 30.2 °C | 118.36 mm |
| July | 20.9 °C | 32.7 °C | 128.27 mm |
| August | 20.1 °C | 32.6 °C | 106.68 mm |
| September | 15.9 °C | 28.9 °C | 122.43 mm |
| October | 9.9 °C | 23.1 °C | 139.7 mm |
| November | 4.6 °C | 16.4 °C | 142.75 mm |
| December | 0.2 °C | 11.3 °C | 137.16 mm |
| Annual | 9.9 °C | 21.9 °C | 1585.48 mm |
| 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 8a : -12.2°C to -9.4°C |
| Plant Hardiness Zone - 2012 | Zone 7b : -15°C to -12.2°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |