Sunflower, Mississippi has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 54 °F (low) to 73.8 °F (high). Annual precipitation averages 56.3 Inches. Sunflower 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. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 34.9 °F | 52.2 °F | 5.15 in. |
| February | 37.8 °F | 56.8 °F | 5.28 in. |
| March | 45.1 °F | 65.4 °F | 5.31 in. |
| April | 53.9 °F | 74.2 °F | 6.11 in. |
| May | 63.2 °F | 82.3 °F | 4.98 in. |
| June | 70.3 °F | 88.8 °F | 3.93 in. |
| July | 72.8 °F | 91.1 °F | 4.18 in. |
| August | 71.4 °F | 91.5 °F | 3.26 in. |
| September | 64.9 °F | 87.3 °F | 3.79 in. |
| October | 53.7 °F | 77.1 °F | 3.75 in. |
| November | 43.3 °F | 64.4 °F | 4.76 in. |
| December | 37.2 °F | 55.0 °F | 5.75 in. |
| Annual | 54 °F | 73.8 °F | 56.25 in. |
| 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 8b : 15°F to 20°F |
| Plant Hardiness Zone - 2012 | Zone 8a : 10°F to 15°F |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |