Coon Valley, Wisconsin has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 2.8 °C (low) to 13.6 °C (high). Annual precipitation averages 945.6 Millimeters. Coon Valley 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. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -12.7 °C | -3.3 °C | 29.21 mm |
| February | -10.8 °C | -0.6 °C | 27.69 mm |
| March | -4.4 °C | 6.1 °C | 48.77 mm |
| April | 2.3 °C | 14.1 °C | 99.06 mm |
| May | 8.8 °C | 20.8 °C | 121.92 mm |
| June | 14.5 °C | 26.2 °C | 141.99 mm |
| July | 16.7 °C | 28.1 °C | 110.74 mm |
| August | 15.5 °C | 27.1 °C | 112.52 mm |
| September | 10.8 °C | 22.9 °C | 98.04 mm |
| October | 4.2 °C | 15.6 °C | 70.1 mm |
| November | -2.2 °C | 6.8 °C | 48.26 mm |
| December | -8.7 °C | -0.3 °C | 37.34 mm |
| Annual | 2.8 °C | 13.6 °C | 945.64 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| 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 4b : -31.7°C to -28.9°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |