McCordsville, Indiana has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 42.7 °F (low) to 61.6 °F (high). Annual precipitation averages 44.8 Inches. McCordsville 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 | 19.4 °F | 35.0 °F | 3.03 in. |
| February | 22.1 °F | 39.1 °F | 2.49 in. |
| March | 30.6 °F | 49.8 °F | 3.38 in. |
| April | 41.4 °F | 62.6 °F | 4.5 in. |
| May | 52.5 °F | 72.5 °F | 5.05 in. |
| June | 61.6 °F | 80.8 °F | 5.24 in. |
| July | 64.5 °F | 83.9 °F | 4.42 in. |
| August | 62.8 °F | 82.8 °F | 3.36 in. |
| September | 55.1 °F | 77.3 °F | 3.4 in. |
| October | 43.8 °F | 65.0 °F | 3.31 in. |
| November | 33.4 °F | 51.2 °F | 3.44 in. |
| December | 24.8 °F | 39.5 °F | 3.14 in. |
| Annual | 42.7 °F | 61.6 °F | 44.76 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 6a : -10°F to -5°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |