Bangor, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 1.6 °C (low) to 12.2 °C (high). Annual precipitation averages 1022.1 Millimeters. Bangor 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 | -13.7 °C | -3.7 °C | 65.53 mm |
| February | -12.8 °C | -2.1 °C | 52.83 mm |
| March | -7.2 °C | 3.2 °C | 61.47 mm |
| April | 0.4 °C | 11.4 °C | 82.3 mm |
| May | 7.2 °C | 19.2 °C | 86.11 mm |
| June | 12.8 °C | 24.1 °C | 110.74 mm |
| July | 15.3 °C | 26.3 °C | 103.63 mm |
| August | 14.2 °C | 25.4 °C | 101.85 mm |
| September | 9.7 °C | 21.4 °C | 96.77 mm |
| October | 3.8 °C | 14 °C | 106.68 mm |
| November | -2 °C | 6.9 °C | 79.5 mm |
| December | -8.7 °C | 0 °C | 74.68 mm |
| Annual | 1.6 °C | 12.2 °C | 1022.09 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 4b : -31.7°C to -28.9°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 |