Elkhart, Illinois has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 42.5 °F (low) to 62.9 °F (high). Annual precipitation averages 38.6 Inches. Elkhart 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 | 18.3 °F | 34.8 °F | 2.13 in. |
| February | 21.4 °F | 39.6 °F | 1.96 in. |
| March | 30.7 °F | 51.2 °F | 2.65 in. |
| April | 41.5 °F | 64.2 °F | 3.95 in. |
| May | 53.1 °F | 74.2 °F | 4.47 in. |
| June | 62.2 °F | 82.9 °F | 4.5 in. |
| July | 65.2 °F | 85.8 °F | 3.97 in. |
| August | 63.2 °F | 84.3 °F | 3.46 in. |
| September | 54.8 °F | 79.2 °F | 3.21 in. |
| October | 43.1 °F | 66.6 °F | 3.24 in. |
| November | 32.4 °F | 51.8 °F | 2.89 in. |
| December | 23.8 °F | 39.8 °F | 2.21 in. |
| Annual | 42.5 °F | 62.9 °F | 38.64 in. |
| 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 : -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 |