Dedham Weather in September

Thinking of visiting Dedham in September? Expect high temperatures reaching 24°C (75°F) during the day, dropping to 12°C (54°F) at night, with the driest conditions of the year.

Rainfall in Dedham in September

Enjoy minimal rain interruptions this month. It's an excellent time for outdoor plans, from sports to festivals. You can expect rain on roughly 9 days based on historical data, averaging 79 mm (3.1 in) for the month. Rainfall intensity is on the higher side this month. Expect more substantial showers rather than light, passing rain.

Temperature in Dedham in September

September is a good time to be in Dedham. Days are perfect, reaching 24°C (75°F), with nights around 12°C (54°F). This gives the month a fairly typical daily rhythm, with warmer afternoons and more comfortable nights. Nights cool down to 12°C (54°F), so a light jacket or extra layer is useful once the sun goes down. On the plus side, the cooler nights make for comfortable sleeping conditions.

Sunshine in Dedham in September

There are approximately 238 hours of sunshine this month, resulting in mostly clear days.

Wind Speed in Dedham in September

Wind speeds average 5 m/s (10 knots) during September. At this speed, gentle to moderate breezes make small trees sway and the wind creates whitecaps on water bodies. Daily variations range from moderate winds to stronger breezes, creating excellent conditions for sailing, kite flying and wind sports.

Average water temperature in September

With water at 18°C (64°F), swimming is comfortable for most people. It feels refreshing rather than cold, though it depends a bit on personal preference.

If you're inclined towards comfortable temperatures and drier conditions, September is a good time to visit Dedham.

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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 States of America, check out our Dedham's climate page.

Dedham Temperature in September

Min Temperature 12°C (54°F)  

Max Temperature 24°C (75°F)  

Water Temperature 18°C (64°F) *  

Chance of Rain 30%  

Precipitation 79 mm (3.1 in)  

Rainy days 9 days  

Humidity 69% *  

Windspeed 5 m/s (10 knots) *  

Sunshine 238 hours *  

Percentage Sunshine 63% *  

* Data from: Boston, the United States of America (17 KM, 11 Miles).

What to Wear in Dedham in September

Pleasant temperatures in September mean you can pack light but flexibel pieces. Think cotton t-shirts, comfortable walking shorts, and one warmer layer for evenings. A light sweater or denim jacket works well. Rain gear is recommended, you can expect wet weather on multiple days. With water temperatures around 18°C (64°F), the water is quite cold for swimming. You can skip the swimwear unless you're particularly tough. And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.

What To Do in Dedham in September

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

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 States of America, check out our Dedham's climate page.

More climate data for Dedham

Temperature Rainfall Sunshine Humidity Wind Speed Water Temp

See the full Dedham climate overview or explore weather in the United States of America.