Fairwater, Wisconsin has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 2.3 °C (low) to 12.9 °C (high). Annual precipitation averages 867.2 Millimeters. Fairwater 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. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -12.4 °C | -3.6 °C | 34.04 mm |
| February | -11.2 °C | -1.6 °C | 31.75 mm |
| March | -5 °C | 5.1 °C | 47.5 mm |
| April | 1.4 °C | 12.8 °C | 87.12 mm |
| May | 7.9 °C | 19.8 °C | 101.6 mm |
| June | 13.6 °C | 25.2 °C | 125.22 mm |
| July | 15.7 °C | 27.1 °C | 102.62 mm |
| August | 14.6 °C | 26.2 °C | 92.96 mm |
| September | 10.3 °C | 22.4 °C | 82.04 mm |
| October | 3.8 °C | 15.1 °C | 71.37 mm |
| November | -2.5 °C | 6.7 °C | 50.8 mm |
| December | -8.6 °C | -0.6 °C | 40.13 mm |
| Annual | 2.3 °C | 12.9 °C | 867.15 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 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 | Dfa - Humid Continental Hot Summers With Year Around Precipitation |