Bangor, Wisconsin has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 2.3 °C (low) to 13.6 °C (high). Annual precipitation averages 928.6 Millimeters. Bangor 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 | -13.2 °C | -3.3 °C | 28.96 mm |
| February | -11.3 °C | -0.6 °C | 28.45 mm |
| March | -4.9 °C | 6.1 °C | 48.51 mm |
| April | 1.8 °C | 13.9 °C | 97.79 mm |
| May | 8.4 °C | 20.9 °C | 119.63 mm |
| June | 14 °C | 26.2 °C | 135.89 mm |
| July | 16.2 °C | 28.2 °C | 108.71 mm |
| August | 14.9 °C | 27.1 °C | 108.97 mm |
| September | 10.3 °C | 22.9 °C | 98.04 mm |
| October | 3.7 °C | 15.4 °C | 69.34 mm |
| November | -2.7 °C | 6.8 °C | 47.24 mm |
| December | -9.2 °C | -0.4 °C | 37.08 mm |
| Annual | 2.3 °C | 13.6 °C | 928.61 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 4b : -31.7°C to -28.9°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |