| 2023 Hardiness Zone: | Zone 6b: -5°F to 0°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: | Dfa - Humid Continental Hot Summers |
| Ecoregion: | 71d - Outer Bluegrass |
| Heat Zone Days: | 15 - 30 days Over 86°F |
Annual Climate Data for ZIP Code 45693 - West Union, OH | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 21 | 24 | 32 | 41 | 51 | 60 | 64 | 62 | 55 | 43 | 34 | 26 | 43 |
| Avg Max Temp (°F) | 39 | 44 | 54 | 65 | 74 | 82 | 86 | 84 | 78 | 67 | 54 | 44 | 64 |
| Avg Precip (In.) | 3.07 | 2.92 | 3.93 | 3.84 | 4.67 | 4.15 | 4.27 | 4.12 | 3.2 | 2.77 | 3.41 | 3.45 | 43.79 |