| 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. 21 - Oct. 31 |
| Average Last Frost Date: | Apr. 21 - Apr. 30 |
| Koppen-Geiger Climate Zone: | Cfa - Humid Subtropical Climate |
| Ecoregion: | 71c - Knobs-Norman Upland |
| Heat Zone Days: | 46 - 60 days Over 86°F |
Annual Climate Data for ZIP Code 40328 - Gravel Switch, KY | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 23 | 25 | 33 | 41 | 51 | 60 | 65 | 62 | 55 | 43 | 35 | 27 | 43 |
| Avg Max Temp (°F) | 42 | 48 | 58 | 67 | 76 | 84 | 87 | 86 | 81 | 70 | 57 | 47 | 67 |
| Avg Precip (In.) | 3.92 | 3.88 | 4.79 | 4.26 | 5.23 | 4.57 | 4.6 | 3.8 | 3.85 | 3.12 | 3.92 | 4.6 | 50.55 |