Friendship, Wisconsin has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 34.4 °F (low) to 55.7 °F (high). Annual precipitation averages 35.6 Inches. 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 | 6.9 °F | 25.6 °F | 1.36 in. |
| February | 9.9 °F | 30.2 °F | 1.21 in. |
| March | 20.9 °F | 42.4 °F | 1.89 in. |
| April | 32.9 °F | 56.1 °F | 3.56 in. |
| May | 45.3 °F | 68.6 °F | 4.12 in. |
| June | 55.4 °F | 78.0 °F | 4.97 in. |
| July | 59.2 °F | 82.1 °F | 4.54 in. |
| August | 56.9 °F | 79.6 °F | 4.28 in. |
| September | 48.6 °F | 72.3 °F | 3.51 in. |
| October | 37.0 °F | 58.8 °F | 2.64 in. |
| November | 25.4 °F | 43.6 °F | 1.91 in. |
| December | 14.4 °F | 30.8 °F | 1.62 in. |
| Annual | 34.4 °F | 55.7 °F | 35.61 in. |
| 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 : -25°F to -20°F |
| Plant Hardiness Zone - 2012 | Zone 4b : -25°F to -20°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |