Columbus, Indiana has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 43.3 °F (low) to 63.8 °F (high). Annual precipitation averages 47.3 Inches. Columbus is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 21.5 °F | 37.7 °F | 3.43 in. |
| February | 23.7 °F | 42.1 °F | 2.85 in. |
| March | 31.9 °F | 52.6 °F | 3.75 in. |
| April | 42.1 °F | 64.8 °F | 4.99 in. |
| May | 52.9 °F | 74.2 °F | 5.21 in. |
| June | 61.7 °F | 82.3 °F | 5.24 in. |
| July | 65.0 °F | 85.3 °F | 4.34 in. |
| August | 63.1 °F | 84.7 °F | 3.46 in. |
| September | 55.2 °F | 79.1 °F | 3.26 in. |
| October | 43.3 °F | 67.3 °F | 3.43 in. |
| November | 33.6 °F | 53.6 °F | 3.7 in. |
| December | 26.1 °F | 42.1 °F | 3.61 in. |
| Annual | 43.3 °F | 63.8 °F | 47.27 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 6b : -5°F to 0°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 |