Mountain, Wisconsin has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from -0.3 °C (low) to 12.2 °C (high). Annual precipitation averages 825.2 Millimeters. Mountain is located in USDA Plant Hardiness Zone 4b. 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 | -15.1 °C | -4.3 °C | 31.75 mm |
| February | -14.1 °C | -2 °C | 29.72 mm |
| March | -8.3 °C | 4.4 °C | 43.94 mm |
| April | -1.3 °C | 12.2 °C | 75.18 mm |
| May | 5.3 °C | 19.6 °C | 89.15 mm |
| June | 10.9 °C | 24.7 °C | 114.81 mm |
| July | 13.2 °C | 27.1 °C | 90.68 mm |
| August | 12.1 °C | 25.9 °C | 82.3 mm |
| September | 7.6 °C | 21.6 °C | 92.2 mm |
| October | 1.2 °C | 13.7 °C | 82.8 mm |
| November | -4.5 °C | 5.3 °C | 49.78 mm |
| December | -10.8 °C | -1.7 °C | 42.93 mm |
| Annual | -0.3 °C | 12.2 °C | 825.24 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 4b : -31.7°C to -28.9°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 |