| 2023 Hardiness Zone: | Zone 7a: 0°F to 5°F |
| 2012 Hardiness Zone: | Zone 6b: -5°F to 0°F |
| 1990 Hardiness Zone: | Zone 6a: -10F to -5F |
| Average First Frost Date: | Oct. 11 - Oct. 20 |
| Average Last Frost Date: | Apr. 11 - Apr. 20 |
| Koppen-Geiger Climate Zone: | Cfa - Humid Subtropical Climate |
| Ecoregion: | 71g - Eastern Highland Rim |
| Heat Zone Days: | 46 - 60 days Over 86°F |
Annual Climate Data for ZIP Code 42728 - Columbia, KY | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 25 | 27 | 35 | 43 | 53 | 61 | 66 | 64 | 57 | 45 | 36 | 29 | 45 |
| Avg Max Temp (°F) | 43 | 49 | 59 | 69 | 77 | 84 | 88 | 87 | 81 | 71 | 58 | 48 | 68 |
| Avg Precip (In.) | 4.16 | 4.05 | 4.98 | 4.24 | 5.36 | 4.64 | 4.64 | 4.11 | 4.12 | 3.17 | 4.21 | 4.92 | 52.6 |