Winnsboro, Louisiana has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 54.4 °F (low) to 76.9 °F (high). Annual precipitation averages 57.4 Inches. Winnsboro is located in USDA Plant Hardiness Zone 8b. The growing season typically runs from the last frost around Mar. 1 - Mar. 10 through the first frost around Nov. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 36.1 °F | 56.8 °F | 5.53 in. |
| February | 39.0 °F | 61.1 °F | 5.14 in. |
| March | 46.2 °F | 68.9 °F | 5.2 in. |
| April | 53.8 °F | 76.8 °F | 6.02 in. |
| May | 62.8 °F | 84.7 °F | 4.71 in. |
| June | 69.8 °F | 90.7 °F | 4.47 in. |
| July | 72.5 °F | 93.5 °F | 4.05 in. |
| August | 71.3 °F | 93.9 °F | 3.57 in. |
| September | 65.2 °F | 89.0 °F | 3.53 in. |
| October | 53.5 °F | 79.8 °F | 4.46 in. |
| November | 43.9 °F | 67.8 °F | 5.08 in. |
| December | 38.1 °F | 59.3 °F | 5.63 in. |
| Annual | 54.4 °F | 76.9 °F | 57.39 in. |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 1 - Mar. 10 |
| Average Days With Frost | 30-40 Days |
| Plant Hardiness Zone | Zone 8b : 15°F to 20°F |
| Plant Hardiness Zone - 2012 | Zone 8b : 15°F to 20°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |