New Glarus, Wisconsin has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 2.8 °C (low) to 14 °C (high). Annual precipitation averages 970.3 Millimeters. New Glarus is located in USDA Plant Hardiness Zone 5a. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -12 °C | -2.6 °C | 37.59 mm |
| February | -10.3 °C | -0.3 °C | 39.37 mm |
| March | -4.3 °C | 6.4 °C | 52.83 mm |
| April | 1.9 °C | 14.2 °C | 97.28 mm |
| May | 8.4 °C | 20.8 °C | 109.98 mm |
| June | 14.1 °C | 26.2 °C | 142.75 mm |
| July | 16.3 °C | 28.1 °C | 110.24 mm |
| August | 15.2 °C | 27.2 °C | 109.22 mm |
| September | 10.4 °C | 23.3 °C | 94.74 mm |
| October | 4 °C | 16.1 °C | 74.17 mm |
| November | -2.2 °C | 7.6 °C | 57.91 mm |
| December | -8.1 °C | 0.5 °C | 44.2 mm |
| Annual | 2.8 °C | 14 °C | 970.28 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 5a : -28.9°C to -26.1°C |
| Plant Hardiness Zone - 2012 | Zone 5a : -28.9°C to -26.1°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |