| 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: | 61 - 90 days Over 86°F |
Annual Climate Data for ZIP Code 40299 - Louisville, KY | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 23 | 26 | 35 | 44 | 53 | 61 | 66 | 64 | 57 | 45 | 36 | 28 | 45 |
| Avg Max Temp (°F) | 41 | 47 | 57 | 68 | 76 | 83 | 87 | 86 | 79 | 69 | 55 | 45 | 66 |
| Avg Precip (In.) | 3.28 | 3.34 | 4.44 | 4.15 | 4.93 | 4.23 | 4.36 | 3.61 | 3.12 | 2.92 | 3.8 | 3.93 | 46.12 |