West Memphis, Arkansas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 10.9 °C (low) to 21.7 °C (high). Annual precipitation averages 1398 Millimeters. West Memphis is located in USDA Plant Hardiness Zone 8a. The growing season typically runs from the last frost around Mar. 11 - Mar. 20 through the first frost around Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -0.7 °C | 8.8 °C | 107.95 mm |
| February | 1.1 °C | 11.7 °C | 115.82 mm |
| March | 5.4 °C | 16.6 °C | 146.3 mm |
| April | 10.6 °C | 22.1 °C | 150.37 mm |
| May | 16 °C | 26.7 °C | 139.19 mm |
| June | 20.5 °C | 31.1 °C | 104.39 mm |
| July | 22.2 °C | 32.4 °C | 101.6 mm |
| August | 21.2 °C | 32.1 °C | 76.2 mm |
| September | 17.2 °C | 29.3 °C | 78.99 mm |
| October | 10.7 °C | 23.4 °C | 110.24 mm |
| November | 4.9 °C | 16.2 °C | 123.44 mm |
| December | 1.1 °C | 10.5 °C | 143.51 mm |
| Annual | 10.9 °C | 21.7 °C | 1398 mm |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Mar. 11 - Mar. 20 |
| Average Days With Frost | 50-75 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 | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |