Boston weather in September (Massachusetts, United States of America)

Curious about the climate in Boston this September? Wondering about the weather this month? Our guide has all the details you need.

Temperatures

During September, Boston experiences perfect weather, with high temperatures and moderate rainfall. Daytime temperatures hover around 24°C, while nights can cool down to about 15°C.

Precipitation

Boston in September usually receives moderate rainfall, averaging around 79 mm for the month. Known for its minimal rainfall, this month is perfect for outdoor enthusiasts. Take advantage of the dry conditions to explore and enjoy various activities. Records from the past 30 years suggest that around 9 days will experience rain.

Average sunshine

Enjoy a sunny month with about 238 hours of sunshine, providing a cheerful and lively atmosphere.

If you're a fan of comfortable temperatures and drier conditions, September is a great time to visit. August and September generally stand out with the best circumstances. While January, February, March and December tend to showcase less optimal conditions.

For an in-depth look at the yearly conditions, visit our specialized Boston climate page with graphs.

 

Boston, monthly averages in September

Min Temperature 15°C  

Max Temperature 24°C  

Water Temperature 18°C  

Chance of Rain 30%  

Precipitation 79 mm  

Rainy days 9 days  

Humidity 69%  

Windspeed 18 km/h  

Sunshine 238 hours  

Percentage Sunshine 63%  

Where to go in the United States of America in September

Find out more about the weather in the United States of America and which places have the best travel conditions in this month.

Weather conditions Weather

Temperatures

Precipitation

Map not visible? Whoops sorry! Please refresh the page.

Legend perfect weather pleasant tolerable unpleasant poor

Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C and 29°C and not too much precipitation (less than 90 mm a month).

So, what should you wear in this month?

For visitors traveling to Boston, we recommend wearing layers. So maybe a skirt, t-shirt, shorts for during the day and jeans and a warm jacket for some days and evenings. Bring a rain jacket in case it rains during your stay. Plan on layering your clothes. With a water temperature of around 18°C there is no need to bring your swimwear.

What To Do

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming

9/10

Cycling

9/10

Walking

9/10

Barbeque

8/10

Camping

8/10

Outdoor sports

9/10

Interested in more climate information?

This site provides you with all the information you need about the climate in Boston.

Our site offers climate and forecast data for every country in the world. Are you going to the United States of America? On this website you can find historical weather averages for many cities in the United States of America. Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal travel conditions. Find out where to go with our weather planner.