Friendship, Wisconsin has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 1.3 °C (low) to 13.1 °C (high). Annual precipitation averages 904.5 Millimeters. Friendship is located in USDA Plant Hardiness Zone 4b. 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 | -13.9 °C | -3.6 °C | 34.54 mm |
| February | -12.3 °C | -1 °C | 30.73 mm |
| March | -6.2 °C | 5.8 °C | 48.01 mm |
| April | 0.5 °C | 13.4 °C | 90.42 mm |
| May | 7.4 °C | 20.3 °C | 104.65 mm |
| June | 13 °C | 25.6 °C | 126.24 mm |
| July | 15.1 °C | 27.8 °C | 115.32 mm |
| August | 13.8 °C | 26.4 °C | 108.71 mm |
| September | 9.2 °C | 22.4 °C | 89.15 mm |
| October | 2.8 °C | 14.9 °C | 67.06 mm |
| November | -3.7 °C | 6.4 °C | 48.51 mm |
| December | -9.8 °C | -0.7 °C | 41.15 mm |
| Annual | 1.3 °C | 13.1 °C | 904.49 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 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 |