Tremont, Maine has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 3.4 °C (low) to 12 °C (high). Annual precipitation averages 1307.1 Millimeters. Tremont is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -8.1 °C | -0.3 °C | 110.74 mm |
| February | -7.7 °C | 0.6 °C | 93.98 mm |
| March | -4 °C | 4.1 °C | 114.55 mm |
| April | 1.4 °C | 10 °C | 112.52 mm |
| May | 6.3 °C | 15.9 °C | 104.65 mm |
| June | 11.1 °C | 20.9 °C | 104.39 mm |
| July | 14.3 °C | 24.2 °C | 81.53 mm |
| August | 14.2 °C | 23.9 °C | 76.71 mm |
| September | 11 °C | 20.1 °C | 102.62 mm |
| October | 5.8 °C | 13.8 °C | 139.45 mm |
| November | 0.9 °C | 8.3 °C | 132.08 mm |
| December | -4.4 °C | 3 °C | 133.86 mm |
| Annual | 3.4 °C | 12 °C | 1307.08 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6a : -23.3°C to -20.6°C |
| Plant Hardiness Zone - 2012 | Zone 5b : -26.1°C to -23.3°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |