Coalmont, Indiana has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 43.8 °F (low) to 63.7 °F (high). Annual precipitation averages 45.7 Inches. Coalmont 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 | 20.6 °F | 36.9 °F | 3.29 in. |
| February | 23.4 °F | 41.8 °F | 2.56 in. |
| March | 32.4 °F | 52.7 °F | 3.5 in. |
| April | 43.2 °F | 64.7 °F | 5.12 in. |
| May | 53.8 °F | 74.4 °F | 4.74 in. |
| June | 62.4 °F | 82.7 °F | 4.68 in. |
| July | 65.4 °F | 85.4 °F | 4.36 in. |
| August | 63.7 °F | 84.6 °F | 3.04 in. |
| September | 55.9 °F | 79.1 °F | 3.66 in. |
| October | 44.7 °F | 67.0 °F | 3.7 in. |
| November | 34.1 °F | 53.2 °F | 3.82 in. |
| December | 25.4 °F | 41.5 °F | 3.22 in. |
| Annual | 43.8 °F | 63.7 °F | 45.69 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 |