Coatesville, Indiana has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 42.3 °F (low) to 61.2 °F (high). Annual precipitation averages 45.1 Inches. Coatesville 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 | 19.3 °F | 34.9 °F | 3.11 in. |
| February | 22.2 °F | 39.3 °F | 2.6 in. |
| March | 31.1 °F | 49.9 °F | 3.36 in. |
| April | 41.4 °F | 61.8 °F | 4.69 in. |
| May | 52.1 °F | 71.8 °F | 4.89 in. |
| June | 61.0 °F | 80.3 °F | 5.24 in. |
| July | 63.9 °F | 83.1 °F | 4.53 in. |
| August | 61.7 °F | 82.0 °F | 3.17 in. |
| September | 54.7 °F | 76.8 °F | 3.55 in. |
| October | 43.1 °F | 64.4 °F | 3.46 in. |
| November | 32.9 °F | 50.7 °F | 3.47 in. |
| December | 24.1 °F | 39.2 °F | 2.99 in. |
| Annual | 42.3 °F | 61.2 °F | 45.06 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 |