Carmel, Maine has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 0.9 °C (low) to 12.5 °C (high). Annual precipitation averages 1165.6 Millimeters. Carmel is located in USDA Plant Hardiness Zone 5a. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -13.8 °C | -2.5 °C | 88.39 mm |
| February | -12.9 °C | -0.8 °C | 76.71 mm |
| March | -6.8 °C | 4.1 °C | 96.27 mm |
| April | -0.2 °C | 11.3 °C | 101.35 mm |
| May | 5.7 °C | 18.3 °C | 90.17 mm |
| June | 10.8 °C | 23.3 °C | 103.89 mm |
| July | 14.3 °C | 26.4 °C | 84.58 mm |
| August | 13.2 °C | 25.8 °C | 86.87 mm |
| September | 8.8 °C | 21.4 °C | 96.01 mm |
| October | 2.8 °C | 14.1 °C | 123.19 mm |
| November | -2.3 °C | 7.3 °C | 104.39 mm |
| December | -8.7 °C | 1 °C | 113.79 mm |
| Annual | 0.9 °C | 12.5 °C | 1165.61 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 5a : -28.9°C to -26.1°C |
| Plant Hardiness Zone - 2012 | Zone 5a : -28.9°C to -26.1°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |