Little Suamico, 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 °C (high). Annual precipitation averages 819.9 Millimeters. Little Suamico 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. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -12.6 °C | -3.8 °C | 39.88 mm |
| February | -12.1 °C | -2 °C | 29.72 mm |
| March | -6.4 °C | 4.1 °C | 45.97 mm |
| April | -0.1 °C | 11.1 °C | 80.26 mm |
| May | 6.5 °C | 18.4 °C | 89.15 mm |
| June | 12.1 °C | 23.8 °C | 99.31 mm |
| July | 14.6 °C | 26.4 °C | 92.46 mm |
| August | 13.8 °C | 25.6 °C | 87.12 mm |
| September | 9.6 °C | 21.4 °C | 85.09 mm |
| October | 3.3 °C | 13.9 °C | 76.71 mm |
| November | -2.6 °C | 6.2 °C | 49.28 mm |
| December | -8.7 °C | -0.7 °C | 44.96 mm |
| Annual | 1.5 °C | 12 °C | 819.91 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 5b : -26.1°C to -23.3°C |
| Plant Hardiness Zone - 2012 | Zone 5a : -28.9°C to -26.1°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |