| 2023 Hardiness Zone: | Zone 6b: -5°F to 0°F 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. 11 - Apr. 20 |
| Koppen-Geiger Climate Zone: | Cfa - Humid Subtropical Climate |
| Ecoregion: | 71d - Outer Bluegrass |
| Heat Zone Days: | 46 - 60 days Over 86°F |
Annual Climate Data for ZIP Code 41031 - Cynthiana, KY | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 19 | 23 | 32 | 40 | 50 | 59 | 63 | 61 | 54 | 41 | 32 | 25 | 41 |
| Avg Max Temp (°F) | 39 | 45 | 55 | 66 | 75 | 83 | 87 | 86 | 80 | 68 | 55 | 45 | 65 |
| Avg Precip (In.) | 3.13 | 3.11 | 4.26 | 3.93 | 4.63 | 4.19 | 4.05 | 3.47 | 2.96 | 2.83 | 3.33 | 3.81 | 43.71 |