Gunnison, Mississippi has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 11.9 °C (low) to 22.7 °C (high). Annual precipitation averages 1382.5 Millimeters. Gunnison 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 | 1.1 °C | 10.6 °C | 123.7 mm |
| February | 2.6 °C | 13.1 °C | 129.54 mm |
| March | 6.8 °C | 17.8 °C | 131.32 mm |
| April | 11.7 °C | 23 °C | 158.75 mm |
| May | 17.1 °C | 27.4 °C | 129.54 mm |
| June | 21.2 °C | 31.2 °C | 93.73 mm |
| July | 22.7 °C | 32.5 °C | 95.5 mm |
| August | 21.7 °C | 32.6 °C | 79.25 mm |
| September | 17.9 °C | 30.1 °C | 79.25 mm |
| October | 11.5 °C | 24.3 °C | 100.84 mm |
| November | 5.8 °C | 17.3 °C | 118.87 mm |
| December | 2.5 °C | 12.1 °C | 142.24 mm |
| Annual | 11.9 °C | 22.7 °C | 1382.53 mm |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 11 - Mar. 20 |
| Average Days With Frost | 40-50 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 | Extreme Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |