Algoma, Wisconsin has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 2.6 °C (low) to 11.1 °C (high). Annual precipitation averages 781.3 Millimeters. Algoma is located in USDA Plant Hardiness Zone 5b. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -11.2 °C | -3.4 °C | 38.1 mm |
| February | -10.4 °C | -1.8 °C | 27.18 mm |
| March | -5.3 °C | 3.4 °C | 41.15 mm |
| April | 0.8 °C | 9.4 °C | 74.68 mm |
| May | 6.7 °C | 16 °C | 82.8 mm |
| June | 12.3 °C | 21.6 °C | 89.92 mm |
| July | 15.4 °C | 24.8 °C | 90.17 mm |
| August | 15.3 °C | 24.3 °C | 87.88 mm |
| September | 11.2 °C | 20.3 °C | 76.96 mm |
| October | 4.9 °C | 13.1 °C | 76.45 mm |
| November | -1.2 °C | 6.1 °C | 55.12 mm |
| December | -7.2 °C | -0.2 °C | 40.89 mm |
| Annual | 2.6 °C | 11.1 °C | 781.3 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 5b : -26.1°C to -23.3°C |
| Plant Hardiness Zone - 2012 | Zone 5b : -26.1°C to -23.3°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |