New Chicago, Indiana has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 42 °F (low) to 60 °F (high). Annual precipitation averages 40.3 Inches. New Chicago 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 | 18.3 °F | 33.0 °F | 2.36 in. |
| February | 20.8 °F | 36.6 °F | 2.03 in. |
| March | 29.3 °F | 47.1 °F | 2.42 in. |
| April | 39.3 °F | 59.4 °F | 3.64 in. |
| May | 49.8 °F | 70.2 °F | 4.15 in. |
| June | 59.8 °F | 79.8 °F | 4.67 in. |
| July | 64.7 °F | 83.6 °F | 4.2 in. |
| August | 63.4 °F | 82.1 °F | 4.25 in. |
| September | 55.9 °F | 76.5 °F | 3.53 in. |
| October | 44.4 °F | 64.1 °F | 3.88 in. |
| November | 33.9 °F | 49.9 °F | 2.9 in. |
| December | 24.1 °F | 37.9 °F | 2.28 in. |
| Annual | 42 °F | 60 °F | 40.31 in. |
| 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 : -10°F to -5°F |
| Plant Hardiness Zone - 2012 | Zone 5b : -15°F to -10°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |