Hebron, Maine has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 35.2 °F (low) to 54.6 °F (high). Annual precipitation averages 50.1 Inches. Hebron is located in USDA Plant Hardiness Zone 5b. 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 | 10.0 °F | 28.1 °F | 3.47 in. |
| February | 11.6 °F | 31.0 °F | 3.31 in. |
| March | 21.0 °F | 39.8 °F | 3.81 in. |
| April | 32.5 °F | 52.7 °F | 4.4 in. |
| May | 43.4 °F | 65.2 °F | 3.89 in. |
| June | 53.3 °F | 73.5 °F | 5.09 in. |
| July | 58.9 °F | 79.2 °F | 4.08 in. |
| August | 57.3 °F | 78.2 °F | 3.86 in. |
| September | 49.5 °F | 70.6 °F | 3.81 in. |
| October | 38.2 °F | 57.5 °F | 5.61 in. |
| November | 28.4 °F | 45.1 °F | 4.36 in. |
| December | 18.1 °F | 34.1 °F | 4.45 in. |
| Annual | 35.2 °F | 54.6 °F | 50.14 in. |
| 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 5b : -15°F to -10°F |
| Plant Hardiness Zone - 2012 | Zone 5a : -20°F to -15°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |