Millhousen, Indiana has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 6.2 °C (low) to 17.5 °C (high). Annual precipitation averages 1194.1 Millimeters. Millhousen 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. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -6 °C | 3.1 °C | 87.63 mm |
| February | -4.7 °C | 5.5 °C | 73.66 mm |
| March | -0.1 °C | 11.2 °C | 99.06 mm |
| April | 5.7 °C | 18.2 °C | 124.97 mm |
| May | 11.5 °C | 23.5 °C | 131.32 mm |
| June | 16.2 °C | 27.6 °C | 128.78 mm |
| July | 18 °C | 29.3 °C | 106.43 mm |
| August | 17.1 °C | 29.1 °C | 89.41 mm |
| September | 12.9 °C | 25.9 °C | 82.04 mm |
| October | 6.6 °C | 19.3 °C | 85.09 mm |
| November | 0.8 °C | 11.8 °C | 91.44 mm |
| December | -3.4 °C | 5.6 °C | 94.23 mm |
| Annual | 6.2 °C | 17.5 °C | 1194.06 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| 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 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |