Boothbay Harbor (ME) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Boothbay Harbor.
Climate overview of Boothbay Harbor
Boothbay Harbor, Maine, United States of America, sees big temperature differences between seasons, with July peaking at 24°C (75°F) and January dropping to 0°C (32°F).
Rain/snowfall is high, totalling around 1297 mm (51 in) per year. December is the wettest month and May the driest. The city also experiences warm summers and very cold winters. The most sunshine falls in July, with an average of 9.3 hours of daily sunshine.
Boothbay Harbor Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Boothbay Harbor - and find the best time to visit.
Monthly Temperature in Boothbay Harbor
Visitors to Boothbay Harbor can expect significant temperature changes throughout the year. Average maximum daytime temperatures range from a comfortable 24°C (75°F) in July, the warmest time of the year, to a very cold 0°C (32°F) during cooler months like January.
At night, you can expect temperatures ranging from 15°C (59°F) in July to around -9°C (16°F) during January.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Boothbay Harbor
Boothbay Harbor is known for its substantial rain/snowfall, with annual precipitation reaching 1297 mm (51 in). While snow/rainfall varies throughout the year, each season offers its own charm. December brings wetter days averaging 141 mm (5.6 in) of precipitation, spread over 15 snowy/rainy days.
In contrast, the driest month May experiences a drier climate, with about 86 mm (3.4 in) of rainfall spread across 13 rainy days. For more details, please visit our Boothbay Harbor Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Sunshine Hours in Boothbay Harbor
Seasonal changes in sunshine hours are quite dramatic in Boothbay Harbor. While July receives considerable daily sunshine with up to 9.3 hours, December marks the darkest time of the year, where sunshine is scarce with only 4.7 hours of sunlight per day.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Daily percentage of sunshine
Humidity in Boothbay Harbor by Month
The relative humidity is high throughout the year in Boothbay Harbor.
The city experiences its highest humidity in September, reaching 77%. In February, the humidity drops to its lowest level at 65%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Best Time to Visit Boothbay Harbor
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: August and September
- Warmest weather: July and August
- Most sunshine: July and August
- Fewest rainy days: February, August, September and November
- Seasonal pattern: Warm summers and very cold winters
- Coldest conditions: January, with freezing nights around -9°C (16°F).
Frequently asked questions about the climate in Boothbay Harbor
What is the best time to visit Boothbay Harbor?
August and September typically offer the most optimal weather in Boothbay Harbor. In contrast, January, February, March, April, November and December tend to have less optimal conditions. Boothbay Harbor has warm summers and very cold winters.
What temperatures can I expect in Boothbay Harbor?
Daytime highs range from 0°C (32°F) in January to 24°C (75°F) in July. Nighttime lows range from -9°C (16°F) to 15°C (59°F). Temperatures vary considerably through the year.
How much rain does Boothbay Harbor get?
Annual rainfall is around 1297 mm (51 in). December is the wettest month with 141 mm (5.6 in), while May is the driest with 86 mm (3.4 in). In the coldest months, precipitation may fall as snow/rain.
How sunny is Boothbay Harbor?
Boothbay Harbor receives around 2,497 hours of sunshine per year. July is the sunniest month with 278 hours, while December is the cloudiest with just 140 hours. Overall, Boothbay Harbor enjoys abundant sunshine.
Boothbay Harbor 3-Day Forecast
Boothbay Harbor (ME) 3-Day Forecast
Boothbay Harbor on the map
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