Glenwood City, Wisconsin has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 0.8 °C (low) to 11.8 °C (high). Annual precipitation averages 859.6 Millimeters. Glenwood City is located in USDA Plant Hardiness Zone 4b. 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 | -15.5 °C | -5.5 °C | 24.38 mm |
| February | -13.8 °C | -2.8 °C | 24.13 mm |
| March | -6.9 °C | 4.1 °C | 44.45 mm |
| April | 0.3 °C | 12.3 °C | 75.95 mm |
| May | 7.2 °C | 19.3 °C | 103.89 mm |
| June | 12.9 °C | 24.6 °C | 128.27 mm |
| July | 15.2 °C | 26.9 °C | 106.43 mm |
| August | 13.8 °C | 25.8 °C | 113.54 mm |
| September | 9.3 °C | 21.6 °C | 90.17 mm |
| October | 2.4 °C | 13.7 °C | 71.63 mm |
| November | -4.2 °C | 4.8 °C | 43.69 mm |
| December | -11.3 °C | -2.7 °C | 33.02 mm |
| Annual | 0.8 °C | 11.8 °C | 859.55 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 4b : -31.7°C to -28.9°C |
| Plant Hardiness Zone - 2012 | Zone 4a : -34.4°C to -31.7°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |