Winona, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 11.9 °C (low) to 24.6 °C (high). Annual precipitation averages 1187.7 Millimeters. Winona 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 | 1.2 °C | 13.7 °C | 97.28 mm |
| February | 3.2 °C | 16.1 °C | 101.6 mm |
| March | 7.2 °C | 20.2 °C | 112.27 mm |
| April | 11.1 °C | 24.6 °C | 104.39 mm |
| May | 16.6 °C | 28.4 °C | 117.09 mm |
| June | 20.7 °C | 32.2 °C | 102.87 mm |
| July | 22.4 °C | 34.2 °C | 70.87 mm |
| August | 21.8 °C | 34.6 °C | 70.61 mm |
| September | 18.1 °C | 31.3 °C | 88.9 mm |
| October | 11.7 °C | 25.7 °C | 115.06 mm |
| November | 6.1 °C | 19.3 °C | 97.03 mm |
| December | 2.2 °C | 14.7 °C | 109.73 mm |
| Annual | 11.9 °C | 24.6 °C | 1187.7 mm |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 1 - Mar. 10 |
| Average Days With Frost | 20-30 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 | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |