Boston Weather in September

Thinking of visiting Boston in September? Expect pleasant temperatures reaching 20°C (68°F) during the day, dropping to 11°C (52°F) at night, and note that quite a bit of rainfall is likely.

Rainfall in Boston in September

Historically, the month has about 12 days of rain, averaging 62 mm (2.4 in) in total. Neither particularly heavy nor particularly frequent, the rain this month is about average. A light jacket should be enough on most wet days.

Temperature in Boston in September

If you're visiting Boston in September, expect perfect temperatures with highs of 20°C (68°F) and overnight lows of 11°C (52°F). Even when the weather is stable, mornings and evenings can still feel distinctly cool. At 11°C (52°F) overnight, it can feel quite a bit cooler after dark. Worth packing something warmer for evenings, but the cooler temperatures are ideal for sleeping.

Sunshine in Boston in September

The area enjoys a moderate level of sunlight, with around 144 hours. It's a good balance between sunny and cloudy days.

If you favor pleasant temperatures and minimal rainfall, September is one of the best months to visit Boston.

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit the United Kingdom, check out our Boston's climate page.

Boston Temperature in September

Min Temperature 11°C (52°F)  

Max Temperature 20°C (68°F)  

Chance of Rain 40%  

Precipitation 62 mm (2.4 in)  

Rainy days 12 days  

Sunshine 144 hours *  

Percentage Sunshine *  

* Data from: Peterborough, the United Kingdom (47 KM, 29 Miles).

What to Wear in Boston in September

Comfortable temperatures call for an easy wardrobe in September. Pack summer basics like t-shirts and shorts, but include a light jacket for cooler moments. A pair of comfortable walking shoes is essential. Wet weather is likely, so pack waterproof gear for multiple rainy days. Sunglasses could come in handy during the sunnier parts of your trip.

What To Do in Boston in September

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

Swimming

6/10

Cycling

10/10

Walking

10/10

Camping

8/10

Outdoor sports

10/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit the United Kingdom, check out our Boston's climate page.

More climate data for Boston

Temperature Rainfall Sunshine

See the full Boston climate overview or explore weather in the United Kingdom.