Glen Flora, Wisconsin has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from -0.4 °C (low) to 11.4 °C (high). Annual precipitation averages 826.8 Millimeters. Glen Flora is located in USDA Plant Hardiness Zone 4a. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -16.6 °C | -5.6 °C | 27.69 mm |
| February | -15.3 °C | -2.8 °C | 25.65 mm |
| March | -8.3 °C | 3.9 °C | 40.39 mm |
| April | -0.9 °C | 11.6 °C | 74.17 mm |
| May | 5.9 °C | 19 °C | 95.5 mm |
| June | 11.4 °C | 24 °C | 118.87 mm |
| July | 13.7 °C | 26.2 °C | 96.27 mm |
| August | 12.3 °C | 25.1 °C | 97.03 mm |
| September | 8.1 °C | 20.9 °C | 87.38 mm |
| October | 1.6 °C | 13.1 °C | 82.8 mm |
| November | -4.9 °C | 4.3 °C | 47.24 mm |
| December | -11.9 °C | -2.7 °C | 33.78 mm |
| Annual | -0.4 °C | 11.4 °C | 826.77 mm |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 4a : -34.4°C to -31.7°C |
| Plant Hardiness Zone - 2012 | Zone 3b : -37.2°C to -34.4°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |