Whitestown, Indiana has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 5.8 °C (low) to 16.3 °C (high). Annual precipitation averages 1093.5 Millimeters. Whitestown is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -7.2 °C | 1.4 °C | 74.93 mm |
| February | -5.7 °C | 3.7 °C | 63.25 mm |
| March | -0.8 °C | 9.7 °C | 81.79 mm |
| April | 5.2 °C | 16.8 °C | 111.51 mm |
| May | 11.3 °C | 22.6 °C | 117.86 mm |
| June | 16.3 °C | 27.1 °C | 131.06 mm |
| July | 18 °C | 28.7 °C | 109.47 mm |
| August | 17 °C | 28.1 °C | 78.99 mm |
| September | 12.8 °C | 25.2 °C | 83.31 mm |
| October | 6.4 °C | 18.5 °C | 79.5 mm |
| November | 0.7 °C | 10.4 °C | 86.87 mm |
| December | -4.2 °C | 3.9 °C | 74.93 mm |
| Annual | 5.8 °C | 16.3 °C | 1093.47 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| 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 |