Glen Haven, Wisconsin has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 3.5 °C (low) to 14.1 °C (high). Annual precipitation averages 942.1 Millimeters. Glen Haven is located in USDA Plant Hardiness Zone 5a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -12 °C | -2.8 °C | 32.77 mm |
| February | -10 °C | -0.2 °C | 31.24 mm |
| March | -3.4 °C | 6.8 °C | 49.28 mm |
| April | 2.9 °C | 14.6 °C | 92.46 mm |
| May | 9.4 °C | 21.1 °C | 114.81 mm |
| June | 15.2 °C | 26.4 °C | 146.81 mm |
| July | 17.3 °C | 28.3 °C | 121.92 mm |
| August | 16.1 °C | 27.3 °C | 93.22 mm |
| September | 11.4 °C | 23.6 °C | 95.25 mm |
| October | 4.7 °C | 16.3 °C | 70.87 mm |
| November | -1.9 °C | 7.5 °C | 52.32 mm |
| December | -8 °C | 0.4 °C | 41.15 mm |
| Annual | 3.5 °C | 14.1 °C | 942.1 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| 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 | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |