Belgrade, Maine has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 1.4 °C (low) to 12.7 °C (high). Annual precipitation averages 1156.7 Millimeters. Belgrade is located in USDA Plant Hardiness Zone 5b. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -13.1 °C | -2.1 °C | 83.57 mm |
| February | -12.2 °C | -0.3 °C | 71.63 mm |
| March | -6.5 °C | 4.5 °C | 86.11 mm |
| April | 0 °C | 11.6 °C | 99.06 mm |
| May | 6.2 °C | 18.4 °C | 89.41 mm |
| June | 11.6 °C | 23.3 °C | 112.78 mm |
| July | 14.7 °C | 26.3 °C | 92.71 mm |
| August | 13.8 °C | 25.8 °C | 91.19 mm |
| September | 9.4 °C | 21.7 °C | 92.96 mm |
| October | 3.3 °C | 14.4 °C | 130.56 mm |
| November | -2.2 °C | 7.5 °C | 103.12 mm |
| December | -8.2 °C | 1.3 °C | 103.63 mm |
| Annual | 1.4 °C | 12.7 °C | 1156.73 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 5b : -26.1°C to -23.3°C |
| Plant Hardiness Zone - 2012 | Zone 5a : -28.9°C to -26.1°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |