| 2023 Hardiness Zone: | Zone 6b: -5°F to 0°F |
| 2012 Hardiness Zone: | Zone 6a: -10°F to -5°F |
| 1990 Hardiness Zone: | Zone 1b: -15F to -10F |
| Average First Frost Date: | Oct. 21 - Oct. 31 |
| Average Last Frost Date: | Apr. 21 - Apr. 30 |
| Koppen-Geiger Climate Zone: | Dfa - Humid Continental Hot Summers |
| Ecoregion: | 55b - Loamy High Lime Till Plains |
| Heat Zone Days: | 31 - 45 days Over 86°F |
Annual Climate Data for ZIP Code 47203 - Columbus, IN | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 19 | 22 | 31 | 41 | 51 | 61 | 65 | 62 | 55 | 42 | 34 | 25 | 42 |
| Avg Max Temp (°F) | 37 | 42 | 52 | 64 | 74 | 83 | 86 | 85 | 79 | 67 | 54 | 41 | 64 |
| Avg Precip (In.) | 2.67 | 2.61 | 3.66 | 4.29 | 4.72 | 3.58 | 4.19 | 3.81 | 3.02 | 2.82 | 3.77 | 3.17 | 42.29 |