Clinton, Mississippi has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 12.4 °C (low) to 24.4 °C (high). Annual precipitation averages 1427.5 Millimeters. Clinton 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 | 2.4 °C | 13.9 °C | 139.7 mm |
| February | 3.9 °C | 16.3 °C | 133.35 mm |
| March | 7.7 °C | 20.7 °C | 132.33 mm |
| April | 11.9 °C | 24.4 °C | 147.83 mm |
| May | 16.9 °C | 28.5 °C | 109.22 mm |
| June | 20.7 °C | 31.7 °C | 113.79 mm |
| July | 22.1 °C | 33 °C | 125.22 mm |
| August | 21.8 °C | 33.2 °C | 107.7 mm |
| September | 18.6 °C | 30.7 °C | 87.63 mm |
| October | 12.1 °C | 25.7 °C | 82.55 mm |
| November | 6.6 °C | 19.5 °C | 115.32 mm |
| December | 3.6 °C | 15.2 °C | 132.84 mm |
| Annual | 12.4 °C | 24.4 °C | 1427.48 mm |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 11 - Mar. 20 |
| Average Days With Frost | 30-40 Days |
| Plant Hardiness Zone | Zone 8b : -9.4°C to -6.7°C |
| Plant Hardiness Zone - 2012 | Zone 8a : -12.2°C to -9.4°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |