Sallis, Mississippi has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 11.1 °C (low) to 23.7 °C (high). Annual precipitation averages 1447.3 Millimeters. Sallis 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 | 1 °C | 12.7 °C | 131.57 mm |
| February | 2.6 °C | 15.2 °C | 133.35 mm |
| March | 6.4 °C | 19.7 °C | 146.05 mm |
| April | 10.6 °C | 23.9 °C | 152.65 mm |
| May | 15.5 °C | 27.8 °C | 111.25 mm |
| June | 19.7 °C | 31.3 °C | 89.66 mm |
| July | 21.3 °C | 32.7 °C | 129.03 mm |
| August | 20.8 °C | 32.7 °C | 104.14 mm |
| September | 17.3 °C | 30.2 °C | 96.27 mm |
| October | 10.8 °C | 24.8 °C | 97.28 mm |
| November | 5.2 °C | 18.7 °C | 116.84 mm |
| December | 2.2 °C | 14.1 °C | 139.19 mm |
| Annual | 11.1 °C | 23.7 °C | 1447.28 mm |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Mar. 11 - Mar. 20 |
| Average Days With Frost | 40-50 Days |
| Plant Hardiness Zone | Zone 8a : -12.2°C to -9.4°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 |