Coloma, Wisconsin has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 1.5 °C (low) to 12.8 °C (high). Annual precipitation averages 876.3 Millimeters. Coloma is located in USDA Plant Hardiness Zone 4b. 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 | -13.9 °C | -3.9 °C | 30.99 mm |
| February | -12.1 °C | -1.2 °C | 27.43 mm |
| March | -6.1 °C | 5.3 °C | 47.5 mm |
| April | 0.6 °C | 13.1 °C | 91.69 mm |
| May | 7.4 °C | 20.1 °C | 104.65 mm |
| June | 13.1 °C | 25 °C | 118.87 mm |
| July | 15 °C | 27.4 °C | 105.92 mm |
| August | 14.1 °C | 26.2 °C | 104.9 mm |
| September | 9.7 °C | 22 °C | 87.88 mm |
| October | 3.1 °C | 14.6 °C | 69.6 mm |
| November | -3.4 °C | 6.1 °C | 48.26 mm |
| December | -9.8 °C | -1 °C | 38.61 mm |
| Annual | 1.5 °C | 12.8 °C | 876.3 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 4b : -31.7°C to -28.9°C |
| Plant Hardiness Zone - 2012 | Zone 4b : -31.7°C to -28.9°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |