Fairchild, Wisconsin has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 0.7 °C (low) to 12.3 °C (high). Annual precipitation averages 888.2 Millimeters. Fairchild is located in USDA Plant Hardiness Zone 4b. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -15.2 °C | -4.9 °C | 32 mm |
| February | -13.5 °C | -2.2 °C | 26.16 mm |
| March | -6.8 °C | 4.7 °C | 45.72 mm |
| April | 0.3 °C | 12.6 °C | 82.3 mm |
| May | 7 °C | 19.7 °C | 105.66 mm |
| June | 12.6 °C | 24.8 °C | 127.51 mm |
| July | 14.7 °C | 27.1 °C | 98.3 mm |
| August | 13.4 °C | 26.1 °C | 108.71 mm |
| September | 8.8 °C | 21.8 °C | 102.36 mm |
| October | 2.3 °C | 14.1 °C | 74.42 mm |
| November | -4.1 °C | 5.4 °C | 48.01 mm |
| December | -10.9 °C | -1.9 °C | 37.08 mm |
| Annual | 0.7 °C | 12.3 °C | 888.23 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 11 - May 20 |
| 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 |