| 2023 Hardiness Zone: | Zone 6a: -10°F to -5°F Zone 6b: -5°F to 0°F |
| 2012 Hardiness Zone: | Zone 6a: -10°F to -5°F |
| 1990 Hardiness Zone: | Zone 5a: -20F to -15F |
| Average First Frost Date: | Oct. 11 - Oct. 20 |
| Average Last Frost Date: | May 1 - May 10 |
| Koppen-Geiger Climate Zone: | Dfb - Humid Continental Mild Summer, Wet All Year |
| Ecoregion: | 61c - Low Lime Drift Plain |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 44641 - Louisville, OH | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 18 | 20 | 28 | 37 | 48 | 57 | 61 | 60 | 53 | 42 | 33 | 24 | 40 |
| Avg Max Temp (°F) | 33 | 37 | 48 | 59 | 70 | 78 | 82 | 81 | 74 | 62 | 49 | 38 | 59 |
| Avg Precip (In.) | 2.45 | 2.21 | 3.07 | 3.31 | 3.97 | 3.82 | 4.3 | 3.73 | 3.39 | 2.56 | 3.14 | 2.97 | 38.93 |