Butler, Wisconsin has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 38.3 °F (low) to 56.8 °F (high). Annual precipitation averages 35.2 Inches. Butler is located in USDA Plant Hardiness Zone 5b. 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 | 13.2 °F | 28.7 °F | 1.7 in. |
| February | 16.2 °F | 32.4 °F | 1.63 in. |
| March | 25.3 °F | 43.2 °F | 2.02 in. |
| April | 35.9 °F | 55.3 °F | 3.9 in. |
| May | 46.7 °F | 67.3 °F | 3.93 in. |
| June | 56.7 °F | 77.4 °F | 4.65 in. |
| July | 62.0 °F | 82.2 °F | 3.78 in. |
| August | 60.5 °F | 80.6 °F | 3.61 in. |
| September | 52.4 °F | 73.7 °F | 3.15 in. |
| October | 41.0 °F | 60.8 °F | 2.79 in. |
| November | 29.9 °F | 46.3 °F | 2.05 in. |
| December | 19.7 °F | 34.2 °F | 2.01 in. |
| Annual | 38.3 °F | 56.8 °F | 35.22 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 5b : -15°F to -10°F |
| Plant Hardiness Zone - 2012 | Zone 5b : -15°F to -10°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |