Pepin, Wisconsin has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 36.3 °F (low) to 55.9 °F (high). Annual precipitation averages 35.2 Inches. Pepin 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 | 7.2 °F | 24.7 °F | 0.98 in. |
| February | 10.5 °F | 29.6 °F | 1.09 in. |
| March | 22.9 °F | 41.9 °F | 1.83 in. |
| April | 35.5 °F | 56.6 °F | 3.24 in. |
| May | 47.6 °F | 69.2 °F | 4.6 in. |
| June | 57.9 °F | 78.8 °F | 5.18 in. |
| July | 62.0 °F | 82.8 °F | 4.25 in. |
| August | 59.7 °F | 80.7 °F | 4.54 in. |
| September | 51.7 °F | 73.3 °F | 3.89 in. |
| October | 39.1 °F | 59.4 °F | 2.58 in. |
| November | 26.8 °F | 43.3 °F | 1.72 in. |
| December | 14.8 °F | 30.1 °F | 1.3 in. |
| Annual | 36.3 °F | 55.9 °F | 35.2 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 | Moderate Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |