Mosinee, Wisconsin has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 0.9 °C (low) to 11.8 °C (high). Annual precipitation averages 849.9 Millimeters. Mosinee is located in USDA Plant Hardiness Zone 5a. 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 | -14.3 °C | -4.9 °C | 29.46 mm |
| February | -13.2 °C | -2.6 °C | 26.16 mm |
| March | -6.9 °C | 4 °C | 41.4 mm |
| April | 0.2 °C | 11.8 °C | 79.25 mm |
| May | 7.1 °C | 18.9 °C | 97.54 mm |
| June | 12.6 °C | 24.1 °C | 117.6 mm |
| July | 14.7 °C | 26.6 °C | 95.76 mm |
| August | 13.5 °C | 25.5 °C | 104.65 mm |
| September | 9 °C | 21.2 °C | 96.52 mm |
| October | 2.6 °C | 13.4 °C | 76.2 mm |
| November | -3.8 °C | 5.2 °C | 47.75 mm |
| December | -10.4 °C | -2.1 °C | 37.59 mm |
| Annual | 0.9 °C | 11.8 °C | 849.88 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 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 |