| 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 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: | 71e - Western Pennyroyal Karst Plain |
| Heat Zone Days: | 61 - 90 days Over 86°F |
Annual Climate Data for ZIP Code 42445 - Princeton, KY | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 25 | 29 | 38 | 46 | 55 | 64 | 68 | 66 | 59 | 47 | 39 | 30 | 47 |
| Avg Max Temp (°F) | 45 | 51 | 62 | 71 | 79 | 87 | 91 | 90 | 84 | 73 | 60 | 49 | 70 |
| Avg Precip (In.) | 3.96 | 4.4 | 4.67 | 4.65 | 5.03 | 4.09 | 4.35 | 3.49 | 3.31 | 3.22 | 4.73 | 4.98 | 50.89 |