| 2023 Hardiness Zone: | Zone 6b: -5°F to 0°F |
| 2012 Hardiness Zone: | Zone 6a: -10°F to -5°F |
| 1990 Hardiness Zone: | Zone 1b: -15F to -10F |
| Average First Frost Date: | Oct. 11 - Oct. 20 |
| Average Last Frost Date: | Apr. 21 - Apr. 30 |
| Koppen-Geiger Climate Zone: | Dfa - Humid Continental Hot Summers |
| Ecoregion: | 55d - Pre-Wisconsinan Drift Plains |
| Heat Zone Days: | 1 - 7 days Over 86°F |
Annual Climate Data for ZIP Code 45054 - Oregonia, OH | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 19 | 22 | 31 | 40 | 50 | 59 | 63 | 61 | 53 | 42 | 34 | 25 | 42 |
| Avg Max Temp (°F) | 36 | 41 | 51 | 63 | 73 | 81 | 85 | 84 | 77 | 66 | 52 | 41 | 62 |
| Avg Precip (In.) | 2.8 | 2.5 | 3.36 | 3.98 | 4.7 | 4.09 | 4.08 | 3.68 | 2.95 | 2.9 | 3.38 | 3 | 41.4 |