| 2023 Hardiness Zone: | Zone 7b: 5°F to 10°F Zone 7a: 0°F to 5°F |
| 2012 Hardiness Zone: | Zone 6b: -5°F to 0°F Zone 7a: 0°F to 5°F |
| 1990 Hardiness Zone: | Zone 6b: -5F to 0F |
| Average First Frost Date: | Nov. 1 - Nov. 10 |
| Average Last Frost Date: | Apr. 11 - Apr. 20 |
| Koppen-Geiger Climate Zone: | Cfa - Humid Subtropical Climate |
| Ecoregion: | 71e - Western Pennyroyal Karst Plain |
| Heat Zone Days: | 61 - 90 days Over 86°F |
Annual Climate Data for ZIP Code 42134 - Franklin, KY | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 25 | 28 | 37 | 45 | 54 | 63 | 67 | 65 | 58 | 46 | 38 | 29 | 46 |
| Avg Max Temp (°F) | 43 | 49 | 59 | 69 | 77 | 85 | 89 | 87 | 81 | 70 | 58 | 48 | 68 |
| Avg Precip (In.) | 3.85 | 4.01 | 4.94 | 4.18 | 5.29 | 4.56 | 4.37 | 3 | 3.7 | 3.04 | 4.38 | 4.83 | 50.15 |