Wanatah, Indiana has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 4.5 °C (low) to 15.3 °C (high). Annual precipitation averages 1008.4 Millimeters. Wanatah is located in USDA Plant Hardiness Zone 5b. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -8.7 °C | -0.1 °C | 58.93 mm |
| February | -7.2 °C | 2.1 °C | 53.09 mm |
| March | -2.4 °C | 8.1 °C | 60.45 mm |
| April | 3.3 °C | 15.3 °C | 90.93 mm |
| May | 9.6 °C | 21.4 °C | 102.87 mm |
| June | 15.1 °C | 26.6 °C | 113.79 mm |
| July | 16.8 °C | 28.3 °C | 107.44 mm |
| August | 15.8 °C | 27.4 °C | 105.16 mm |
| September | 11.6 °C | 24.4 °C | 86.87 mm |
| October | 5.5 °C | 17.5 °C | 98.3 mm |
| November | -0.1 °C | 9.6 °C | 73.41 mm |
| December | -5.3 °C | 2.8 °C | 57.15 mm |
| Annual | 4.5 °C | 15.3 °C | 1008.39 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 5b : -26.1°C to -23.3°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 |