Chain O' Lakes, Wisconsin has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 1.6 °C (low) to 12.8 °C (high). Annual precipitation averages 854.2 Millimeters. Chain O' Lakes 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 | -13.2 °C | -3.8 °C | 34.04 mm |
| February | -11.9 °C | -1.4 °C | 28.96 mm |
| March | -6 °C | 5.1 °C | 48.26 mm |
| April | 0.6 °C | 12.8 °C | 87.12 mm |
| May | 7.4 °C | 19.9 °C | 102.62 mm |
| June | 13 °C | 25.1 °C | 117.35 mm |
| July | 15.2 °C | 27.7 °C | 93.22 mm |
| August | 14.1 °C | 26.4 °C | 97.03 mm |
| September | 9.4 °C | 22.1 °C | 85.85 mm |
| October | 2.8 °C | 14.6 °C | 68.07 mm |
| November | -3.2 °C | 6.3 °C | 48.77 mm |
| December | -9.3 °C | -0.9 °C | 42.93 mm |
| Annual | 1.6 °C | 12.8 °C | 854.22 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 5a : -28.9°C to -26.1°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |