| 2023 Hardiness Zone: | Zone 6a: -10°F to -5°F |
| 2012 Hardiness Zone: | Zone 5b: -15°F to -10°F |
| 1990 Hardiness Zone: | Zone 1b: -15F to -10F |
| Average First Frost Date: | Oct. 11 - Oct. 20 |
| Average Last Frost Date: | May 1 - May 10 |
| Koppen-Geiger Climate Zone: | Dfa - Humid Continental Hot Summers |
| Ecoregion: | 55b - Loamy High Lime Till Plains |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 45346 - New Madison, OH | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 16 | 19 | 28 | 38 | 49 | 58 | 61 | 59 | 52 | 40 | 32 | 22 | 39 |
| Avg Max Temp (°F) | 33 | 38 | 49 | 61 | 72 | 80 | 84 | 82 | 76 | 64 | 50 | 38 | 60 |
| Avg Precip (In.) | 2.44 | 2.2 | 3.1 | 3.71 | 4.42 | 4.14 | 4.05 | 3.5 | 2.63 | 2.83 | 3.24 | 2.91 | 39.15 |