Water Valley, Mississippi has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 10.3 °C (low) to 22.9 °C (high). Annual precipitation averages 1490.2 Millimeters. Water Valley 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 | -0.5 °C | 11.1 °C | 130.56 mm |
| February | 1.1 °C | 13.7 °C | 137.67 mm |
| March | 5.2 °C | 18.5 °C | 134.11 mm |
| April | 9.6 °C | 23.2 °C | 153.92 mm |
| May | 15.1 °C | 27.2 °C | 130.81 mm |
| June | 19.4 °C | 30.9 °C | 127.25 mm |
| July | 21.3 °C | 32.4 °C | 119.63 mm |
| August | 20.6 °C | 32.7 °C | 97.28 mm |
| September | 16.7 °C | 30.1 °C | 92.96 mm |
| October | 10 °C | 24.4 °C | 95.25 mm |
| November | 4.2 °C | 17.7 °C | 114.81 mm |
| December | 0.9 °C | 12.6 °C | 155.96 mm |
| Annual | 10.3 °C | 22.9 °C | 1490.21 mm |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| 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 | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |