| 2023 Hardiness Zone: | Zone 7a: 0°F to 5°F |
| 2012 Hardiness Zone: | Zone 6b: -5°F to 0°F |
| 1990 Hardiness Zone: | Zone 6b: -5F to 0F |
| 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: | 61 - 90 days Over 86°F |
Annual Climate Data for ZIP Code 40207 - Louisville, KY | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 24 | 27 | 36 | 45 | 54 | 63 | 67 | 66 | 59 | 47 | 38 | 29 | 46 |
| Avg Max Temp (°F) | 41 | 47 | 57 | 68 | 76 | 84 | 88 | 87 | 80 | 69 | 56 | 46 | 67 |
| Avg Precip (In.) | 3.24 | 3.2 | 4.41 | 4.12 | 4.89 | 4.04 | 4.27 | 3.54 | 3.12 | 2.89 | 3.77 | 3.79 | 45.29 |