Tremont, Maine has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 38.1 °F (low) to 53.7 °F (high). Annual precipitation averages 51.5 Inches. 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 | 17.4 °F | 31.5 °F | 4.36 in. |
| February | 18.1 °F | 33.1 °F | 3.7 in. |
| March | 24.8 °F | 39.4 °F | 4.51 in. |
| April | 34.5 °F | 50.0 °F | 4.43 in. |
| May | 43.4 °F | 60.6 °F | 4.12 in. |
| June | 51.9 °F | 69.7 °F | 4.11 in. |
| July | 57.7 °F | 75.5 °F | 3.21 in. |
| August | 57.5 °F | 75.0 °F | 3.02 in. |
| September | 51.8 °F | 68.1 °F | 4.04 in. |
| October | 42.5 °F | 56.9 °F | 5.49 in. |
| November | 33.7 °F | 47.0 °F | 5.2 in. |
| December | 24.0 °F | 37.4 °F | 5.27 in. |
| Annual | 38.1 °F | 53.7 °F | 51.46 in. |
| 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 : -10°F to -5°F |
| Plant Hardiness Zone - 2012 | Zone 5b : -15°F to -10°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |