| 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. 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 40229 - Louisville, KY | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 24 | 27 | 36 | 44 | 54 | 63 | 67 | 65 | 58 | 46 | 38 | 29 | 46 |
| Avg Max Temp (°F) | 42 | 47 | 58 | 68 | 76 | 84 | 88 | 87 | 80 | 70 | 56 | 46 | 67 |
| Avg Precip (In.) | 3.27 | 3.5 | 4.39 | 4.16 | 4.79 | 4.26 | 4.21 | 3.53 | 3.06 | 3 | 3.86 | 4.03 | 46.07 |