Searsport, Maine has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 36 °F (low) to 54.7 °F (high). Annual precipitation averages 48.6 Inches. Searsport 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 °F | 30.1 °F | 3.94 in. |
| February | 14.5 °F | 32.7 °F | 3.23 in. |
| March | 22.6 °F | 40.1 °F | 3.91 in. |
| April | 32.9 °F | 52.1 °F | 4.39 in. |
| May | 42.3 °F | 63.1 °F | 3.81 in. |
| June | 51.5 °F | 72.1 °F | 4.29 in. |
| July | 57.5 °F | 77.9 °F | 3.16 in. |
| August | 56.6 °F | 77.4 °F | 3.25 in. |
| September | 49.8 °F | 70.3 °F | 3.93 in. |
| October | 39.9 °F | 58.2 °F | 5.41 in. |
| November | 30.6 °F | 46.5 °F | 4.65 in. |
| December | 20.5 °F | 36.2 °F | 4.61 in. |
| Annual | 36 °F | 54.7 °F | 48.58 in. |
| 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 : -15°F to -10°F |
| Plant Hardiness Zone - 2012 | Zone 5b : -15°F to -10°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |