Winnfield, Louisiana has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 12.2 °C (low) to 25.2 °C (high). Annual precipitation averages 1501.4 Millimeters. Winnfield 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 | 2.4 °C | 14.7 °C | 145.29 mm |
| February | 4.1 °C | 17 °C | 125.73 mm |
| March | 7.7 °C | 21.4 °C | 136.91 mm |
| April | 11.7 °C | 25.4 °C | 149.86 mm |
| May | 16.6 °C | 29.2 °C | 122.94 mm |
| June | 20.5 °C | 32.5 °C | 123.95 mm |
| July | 22 °C | 33.8 °C | 114.81 mm |
| August | 21.5 °C | 34.1 °C | 97.28 mm |
| September | 18.2 °C | 31.6 °C | 88.14 mm |
| October | 11.9 °C | 26.6 °C | 114.81 mm |
| November | 6.4 °C | 20.2 °C | 128.52 mm |
| December | 3.3 °C | 15.7 °C | 153.16 mm |
| Annual | 12.2 °C | 25.2 °C | 1501.4 mm |
| 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 : -9.4°C to -6.7°C |
| Plant Hardiness Zone - 2012 | Zone 8b : -9.4°C to -6.7°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |