Coon Valley, Wisconsin has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 37.1 °F (low) to 56.5 °F (high). Annual precipitation averages 37.2 Inches. 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 | 9.2 °F | 26.1 °F | 1.15 in. |
| February | 12.6 °F | 30.9 °F | 1.09 in. |
| March | 24.0 °F | 43.0 °F | 1.92 in. |
| April | 36.2 °F | 57.3 °F | 3.9 in. |
| May | 47.9 °F | 69.5 °F | 4.8 in. |
| June | 58.1 °F | 79.1 °F | 5.59 in. |
| July | 62.0 °F | 82.5 °F | 4.36 in. |
| August | 59.9 °F | 80.7 °F | 4.43 in. |
| September | 51.5 °F | 73.3 °F | 3.86 in. |
| October | 39.5 °F | 60.0 °F | 2.76 in. |
| November | 28.0 °F | 44.2 °F | 1.9 in. |
| December | 16.4 °F | 31.4 °F | 1.47 in. |
| Annual | 37.1 °F | 56.5 °F | 37.23 in. |
| 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 : -20°F to -15°F |
| Plant Hardiness Zone - 2012 | Zone 4b : -25°F to -20°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |