Peshtigo, Wisconsin has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 1.5 °C (low) to 11.9 °C (high). Annual precipitation averages 840.7 Millimeters. Peshtigo is located in USDA Plant Hardiness Zone 5a. 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 | -12.7 °C | -3.7 °C | 39.62 mm |
| February | -12.2 °C | -1.9 °C | 29.97 mm |
| March | -6.5 °C | 3.9 °C | 46.74 mm |
| April | -0.1 °C | 10.5 °C | 77.47 mm |
| May | 6.6 °C | 18.1 °C | 90.93 mm |
| June | 12.2 °C | 23.7 °C | 100.33 mm |
| July | 14.8 °C | 26.3 °C | 94.23 mm |
| August | 13.9 °C | 25.3 °C | 86.87 mm |
| September | 9.6 °C | 21.2 °C | 87.88 mm |
| October | 3.3 °C | 13.7 °C | 84.58 mm |
| November | -2.4 °C | 6.2 °C | 53.85 mm |
| December | -8.7 °C | -0.6 °C | 48.26 mm |
| Annual | 1.5 °C | 11.9 °C | 840.73 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 5a : -28.9°C to -26.1°C |
| Plant Hardiness Zone - 2012 | Zone 5a : -28.9°C to -26.1°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |