Fenwood, Wisconsin has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 33 °F (low) to 52.8 °F (high). Annual precipitation averages 32.4 Inches. Fenwood 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 | 5.1 °F | 22.5 °F | 1.03 in. |
| February | 7.3 °F | 26.8 °F | 0.93 in. |
| March | 18.8 °F | 38.9 °F | 1.58 in. |
| April | 31.8 °F | 53.0 °F | 2.9 in. |
| May | 44.2 °F | 65.8 °F | 3.72 in. |
| June | 54.2 °F | 75.0 °F | 4.84 in. |
| July | 58.1 °F | 79.5 °F | 3.61 in. |
| August | 55.9 °F | 77.3 °F | 3.94 in. |
| September | 47.8 °F | 69.8 °F | 3.86 in. |
| October | 35.9 °F | 55.9 °F | 2.9 in. |
| November | 24.6 °F | 40.7 °F | 1.8 in. |
| December | 12.4 °F | 27.8 °F | 1.33 in. |
| Annual | 33 °F | 52.8 °F | 32.44 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 | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |