Millhousen, Indiana has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 43.2 °F (low) to 63.5 °F (high). Annual precipitation averages 47 Inches. 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 | 21.2 °F | 37.6 °F | 3.45 in. |
| February | 23.5 °F | 41.9 °F | 2.9 in. |
| March | 31.8 °F | 52.2 °F | 3.9 in. |
| April | 42.2 °F | 64.7 °F | 4.92 in. |
| May | 52.7 °F | 74.3 °F | 5.17 in. |
| June | 61.2 °F | 81.7 °F | 5.07 in. |
| July | 64.4 °F | 84.8 °F | 4.19 in. |
| August | 62.7 °F | 84.3 °F | 3.52 in. |
| September | 55.2 °F | 78.6 °F | 3.23 in. |
| October | 43.8 °F | 66.7 °F | 3.35 in. |
| November | 33.4 °F | 53.2 °F | 3.6 in. |
| December | 25.9 °F | 42.0 °F | 3.71 in. |
| Annual | 43.2 °F | 63.5 °F | 47.01 in. |
| 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 : -5°F to 0°F |
| Plant Hardiness Zone - 2012 | Zone 6a : -10°F to -5°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |