Williams Creek, Indiana has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 6.4 °C (low) to 16.8 °C (high). Annual precipitation averages 1113.5 Millimeters. Williams Creek 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 | -6.6 °C | 1.9 °C | 74.93 mm |
| February | -5.1 °C | 4.2 °C | 62.74 mm |
| March | -0.3 °C | 10.2 °C | 85.09 mm |
| April | 5.8 °C | 17.3 °C | 112.01 mm |
| May | 11.9 °C | 22.8 °C | 122.68 mm |
| June | 16.9 °C | 27.4 °C | 131.06 mm |
| July | 18.7 °C | 29.2 °C | 111.25 mm |
| August | 17.7 °C | 28.6 °C | 82.04 mm |
| September | 13.4 °C | 25.5 °C | 85.85 mm |
| October | 7.1 °C | 18.7 °C | 82.55 mm |
| November | 1.2 °C | 10.9 °C | 86.36 mm |
| December | -3.7 °C | 4.4 °C | 76.96 mm |
| Annual | 6.4 °C | 16.8 °C | 1113.52 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 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |