| 2023 Hardiness Zone: | Zone 6a: -10°F to -5°F |
| 2012 Hardiness Zone: | Zone 6a: -10°F to -5°F Zone 5b: -15°F to -10°F |
| 1990 Hardiness Zone: | Zone 1b: -15F to -10F |
| Average First Frost Date: | Oct. 1 - Oct. 10 |
| Average Last Frost Date: | May 11 - May 20 |
| Koppen-Geiger Climate Zone: | Dfa - Humid Continental Hot Summers |
| Ecoregion: | 61c - Low Lime Drift Plain |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 44822 - Butler, OH | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 15 | 17 | 25 | 35 | 45 | 55 | 58 | 57 | 49 | 39 | 30 | 21 | 37 |
| Avg Max Temp (°F) | 32 | 36 | 47 | 59 | 69 | 78 | 82 | 80 | 74 | 62 | 49 | 37 | 59 |
| Avg Precip (In.) | 2.49 | 2.19 | 2.93 | 3.53 | 4.17 | 4.42 | 4.18 | 4.01 | 3.35 | 2.56 | 3.26 | 2.88 | 39.96 |