Windom, Texas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 52 °F (low) to 74 °F (high). Annual precipitation averages 44.7 Inches. Windom is located in USDA Plant Hardiness Zone 8a. 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 | 31.8 °F | 53.2 °F | 2.91 in. |
| February | 35.3 °F | 57.3 °F | 3.26 in. |
| March | 42.7 °F | 65.1 °F | 3.98 in. |
| April | 50.3 °F | 72.9 °F | 3.82 in. |
| May | 60.2 °F | 80.2 °F | 5.33 in. |
| June | 68.5 °F | 88.5 °F | 3.98 in. |
| July | 72.1 °F | 93.5 °F | 2.78 in. |
| August | 71.0 °F | 93.8 °F | 2.59 in. |
| September | 64.0 °F | 87.0 °F | 3.64 in. |
| October | 52.3 °F | 76.4 °F | 4.67 in. |
| November | 42.0 °F | 64.5 °F | 3.81 in. |
| December | 34.1 °F | 55.3 °F | 3.96 in. |
| Annual | 52 °F | 74 °F | 44.73 in. |
| 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 8a : 10°F to 15°F |
| Plant Hardiness Zone - 2012 | Zone 8a : 10°F to 15°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |