Bangor, Wisconsin has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 36.2 °F (low) to 56.5 °F (high). Annual precipitation averages 36.6 Inches. 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 | 8.2 °F | 26.1 °F | 1.14 in. |
| February | 11.6 °F | 30.9 °F | 1.12 in. |
| March | 23.2 °F | 43.0 °F | 1.91 in. |
| April | 35.3 °F | 57.1 °F | 3.85 in. |
| May | 47.1 °F | 69.6 °F | 4.71 in. |
| June | 57.2 °F | 79.1 °F | 5.35 in. |
| July | 61.1 °F | 82.8 °F | 4.28 in. |
| August | 58.9 °F | 80.8 °F | 4.29 in. |
| September | 50.5 °F | 73.2 °F | 3.86 in. |
| October | 38.6 °F | 59.8 °F | 2.73 in. |
| November | 27.1 °F | 44.2 °F | 1.86 in. |
| December | 15.5 °F | 31.2 °F | 1.46 in. |
| Annual | 36.2 °F | 56.5 °F | 36.56 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 5a : -20°F to -15°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 |