Boston (MA) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Boston.
Climate overview of Boston
Boston has no true dry season as it rains intermittently throughout the year. Much of the rainfall during the summer and early fall comes from showers and thunderstorms. The main snow season occurs from December through March.
Boston Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Boston — and find the best time to visit.
Monthly Temperature in Boston
In Boston, temperatures differ significantly between summer and winter months. On average, daytime temperatures range from a comfortable 29°C (84°F) in July to a chilly 3°C (37°F) in February.
Nighttime temperatures range from 19°C (66°F) in July to -6°C (21°F) in February.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Boston
Boston experiences significant rain/snowfall throughout the year, averaging 1238 mm (49 in) of precipitation annually. The amount of precipitation varies moderately throughout the year. The wettest month, December, sees around 132 mm (5.2 in) of snow/rainfall, perfect for those who enjoy a bit of snow/rain now and then. The driest month, September, still receives a respectable 79 mm (3.1 in) of rainfall. For more details, please visit our Boston 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 Boston
In Boston, summer days are longer and more sunny, with daily sunshine hours peaking at 10.0 hours in May. As the darker season arrives, the brightness of the sun becomes less. December sees a soft sun for only 4.7 hours per average day.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Daily percentage of sunshine
Water Temperature in Boston
The mean water temperature over the year ranges from 4°C (39°F) in February to 20°C (68°F) in August.
Water temperature over the year
Humidity in Boston by Month
The relative humidity is high throughout the year in Boston.
The city experiences its highest humidity in August, reaching 72%. In February, the humidity drops to its lowest level at 62%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Wind Speed in Boston
The mean wind speed over the year ranges from 5 m/s (10 knots) in June, July, August and September to 7 m/s (14 knots) in January, February, March and December. What does this mean?
The mean monthly wind speed over the year (meters per second)
Best Time to Visit Boston
Frequently asked questions about the climate in Boston
What is the best time to visit Boston?
August and September typically offer the most optimal weather in Boston. In contrast, January, February, March and December tend to have less optimal conditions.
What temperatures can I expect in Boston?
Daytime highs range from 3°C (37°F) in February to 29°C (84°F) in July. Nighttime lows range from -6°C (21°F) to 19°C (66°F). Temperatures vary considerably through the year.
How much rain does Boston get?
Annual rainfall is around 1238 mm (49 in). December is the wettest month with 132 mm (5.2 in), while September is the driest with 79 mm (3.1 in). In the coldest months, precipitation may fall as snow/rain.
How sunny is Boston?
Boston receives around 2,665 hours of sunshine per year. May is the sunniest month with 301 hours, while December is the cloudiest with just 141 hours. Overall, Boston enjoys abundant sunshine.
Boston 3-Day Forecast
Boston (MA) 3-Day Forecast
Boston on the map
Boston is highlighted — select any city to see its climate.
Popular this month
Where to go in July — average daytime high across popular destinations.
Bucket list
Need travel inspiration? Check out our bucket list articles and be inspired.
Yosemite National Park is definitely worth a visit
Vast forests, blue lakes, towering sequoias, and majestic waterfalls hint at the beauty of Yosemite National Park—a true natural masterpiece.
The 10 most alternative cities in the United States
Discover the top 10 fun and alternative U.S. cities rich in art, culture, and adventure. From Portland's hippy charm to Sedona's stunning landscapes.
Sedona: Explore Majestic Red Rock Landscapes
A picturesque artists' town surrounded by red rocks and known for its spirituality, vortex energy, and stunning hikes like Cathedral Rock.
10 most idyllic villages to visit in the United States
Discover 10 idyllic villages in the USA, from California to Vermont. Explore their unique charm, rich history, stunning nature, and vibrant arts scenes.