Odanah, Wisconsin has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 0.4 °C (low) to 10.8 °C (high). Annual precipitation averages 800.4 Millimeters. Odanah is located in USDA Plant Hardiness Zone 5a. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -14 °C | -4.7 °C | 37.59 mm |
| February | -13.2 °C | -2.4 °C | 29.72 mm |
| March | -7.8 °C | 2.9 °C | 43.94 mm |
| April | -1.2 °C | 9.1 °C | 73.41 mm |
| May | 4.2 °C | 15.9 °C | 87.38 mm |
| June | 9.9 °C | 21.8 °C | 91.44 mm |
| July | 13.8 °C | 25.3 °C | 101.09 mm |
| August | 13.3 °C | 24.8 °C | 82.3 mm |
| September | 9.3 °C | 20.6 °C | 79.25 mm |
| October | 3 °C | 12.7 °C | 78.74 mm |
| November | -2.7 °C | 5 °C | 50.55 mm |
| December | -9.5 °C | -1.7 °C | 44.96 mm |
| Annual | 0.4 °C | 10.8 °C | 800.37 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 150-180 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 | Moderate Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |