Windom, Kansas has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 6.8 °C (low) to 19.4 °C (high). Annual precipitation averages 783.1 Millimeters. Windom is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -6.1 °C | 5.7 °C | 20.57 mm |
| February | -4.7 °C | 7.7 °C | 29.21 mm |
| March | 0.8 °C | 13.7 °C | 54.61 mm |
| April | 5.8 °C | 19 °C | 68.83 mm |
| May | 12.1 °C | 24.3 °C | 127.25 mm |
| June | 17.9 °C | 30.3 °C | 104.14 mm |
| July | 20.2 °C | 32.7 °C | 99.82 mm |
| August | 19.1 °C | 31.7 °C | 91.69 mm |
| September | 14.3 °C | 27.7 °C | 62.23 mm |
| October | 7.2 °C | 20.8 °C | 61.72 mm |
| November | 0.3 °C | 13.2 °C | 35.31 mm |
| December | -4.8 °C | 6.5 °C | 27.69 mm |
| Annual | 6.8 °C | 19.4 °C | 783.07 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 6b : -20.6°C to -17.8°C |
| Plant Hardiness Zone - 2012 | Zone 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |