South Dennis Weather in September

South Dennis in September sees high daytime temperatures of 22°C (72°F) and nighttime lows of 14°C (57°F). Rainfall is fairly high this month at around 96 mm (3.8 in), so pack a rain jacket to stay dry.

Rainfall in South Dennis in September

Historically, approximately 8 days this month are expected to have rain, averaging 96 mm (3.8 in). The rain this month tends to fall in heavier spells rather than light drizzle. When it rains, showers can be significant.

Temperature in South Dennis in September

South Dennis has perfect weather in September, with days reaching 22°C (72°F) and nights cooling to 14°C (57°F). During September, the summer season is in full swing. The days can feel warmer than the evenings, so packing for both parts of the day is a good idea. Nights drop to around 14°C (57°F), which is noticeably cooler than the daytime. A light jacket for the evening is a sensible addition, and the cool nights tend to make sleeping comfortable.

Sunshine in South Dennis in September

The city usually sees around 231 hours of sunlight, indicating many sunny days — a great month for sightseeing.

So this is a great month to visit if you prefer dry days with pleasant temperatures.

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• January
• February
• March
• April

• May
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• 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 South Dennis's climate page.

South Dennis Temperature in September

Min Temperature 14°C (57°F)  

Max Temperature 22°C (72°F)  

Chance of Rain 27%  

Precipitation 96 mm (3.8 in)  

Rainy days 8 days  

Sunshine 231 hours *  

Percentage Sunshine *  

* Data from: Nantucket, the United States of America (45 KM, 28 Miles).

What to Wear in South Dennis 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. Prepare for significant rainfall with proper waterproof clothing and shoes. You'll definitely want to pack sunglasses and sunscreen. There will be plenty of bright sunshine this month.

What To Do in South Dennis in September

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

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 South Dennis's climate page.

More climate data for South Dennis

Temperature Rainfall Sunshine

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