| 2023 Hardiness Zone: | Zone 6b: -5°F to 0°F Zone 7a: 0°F to 5°F |
| 2012 Hardiness Zone: | Zone 6a: -10°F to -5°F 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 40245 - Louisville, KY | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 23 | 26 | 34 | 43 | 52 | 61 | 65 | 63 | 56 | 44 | 36 | 27 | 44 |
| Avg Max Temp (°F) | 41 | 47 | 57 | 68 | 76 | 83 | 86 | 85 | 79 | 69 | 55 | 45 | 66 |
| Avg Precip (In.) | 3.28 | 3.32 | 4.45 | 4.15 | 4.96 | 4.27 | 4.38 | 3.67 | 3.12 | 2.94 | 3.8 | 3.94 | 46.27 |