Wathena, Kansas has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 6 °C (low) to 18.1 °C (high). Annual precipitation averages 930.6 Millimeters. Wathena is located in USDA Plant Hardiness Zone 6a. 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 | -8.3 °C | 2.7 °C | 24.38 mm |
| February | -6.1 °C | 5.5 °C | 33.27 mm |
| March | -0.3 °C | 12.4 °C | 56.64 mm |
| April | 5.5 °C | 18.6 °C | 93.98 mm |
| May | 12.1 °C | 24.1 °C | 125.48 mm |
| June | 17.6 °C | 29.1 °C | 125.98 mm |
| July | 19.6 °C | 31 °C | 120.9 mm |
| August | 18.2 °C | 30.2 °C | 99.06 mm |
| September | 13.3 °C | 26.7 °C | 86.36 mm |
| October | 6.2 °C | 19.8 °C | 77.72 mm |
| November | -0.2 °C | 12.2 °C | 48.77 mm |
| December | -5.9 °C | 5 °C | 38.1 mm |
| Annual | 6 °C | 18.1 °C | 930.64 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 6a : -23.3°C to -20.6°C |
| Plant Hardiness Zone - 2012 | Zone 5b : -26.1°C to -23.3°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |