Butler, Ohio has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 39.4 °F (low) to 60 °F (high). Annual precipitation averages 42.3 Inches. Butler is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 17.5 °F | 33.9 °F | 3.42 in. |
| February | 18.9 °F | 36.9 °F | 2.47 in. |
| March | 26.9 °F | 46.9 °F | 3.21 in. |
| April | 37.4 °F | 60.4 °F | 3.92 in. |
| May | 48.1 °F | 70.7 °F | 4.51 in. |
| June | 57.6 °F | 79.3 °F | 4.95 in. |
| July | 60.6 °F | 82.6 °F | 4.01 in. |
| August | 58.9 °F | 81.4 °F | 3.63 in. |
| September | 51.5 °F | 75.5 °F | 3.21 in. |
| October | 40.3 °F | 63.2 °F | 2.95 in. |
| November | 31.1 °F | 49.9 °F | 2.95 in. |
| December | 23.4 °F | 38.7 °F | 3.1 in. |
| Annual | 39.4 °F | 60 °F | 42.33 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6a : -10°F to -5°F |
| Plant Hardiness Zone - 2012 | Zone 5b : -15°F to -10°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |