Dennis Weather in September

September in Dennis brings high temperatures, with highs of 22°C (72°F) and nights dropping to 14°C (57°F). Rainfall is on the higher side this month, averaging around 98 mm (3.9 in), so keep a rain jacket handy.

Rainfall in Dennis in September

Typically, you can expect about 8 days of rain this month, with 98 mm (3.9 in) on average. Rainfall intensity is on the higher side this month. Expect more substantial showers rather than light, passing rain.

Temperature in Dennis in September

September is a perfect month in Dennis, with 22°C (72°F) during the day and 14°C (57°F) at night. September is typically considered a summer month. The days can feel warmer than the evenings, so packing for both parts of the day is a good idea. Nights cool down to 14°C (57°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 Dennis in September

The days are predominantly sunny, with an estimated total of around 231 hours of sunshine. These sun-filled days are perfect for playing sports, visiting parks, or going for a bike ride.

Our weather planner can help you find worldwide destinations with pleasant weather during this period. June, July, August and September typically offer the best weather for Dennis.

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• January
• February
• March
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• May
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• October
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For a detailed overview over the year and the best time to visit the United States of America, check out our Dennis's climate page.

Dennis Temperature in September

Min Temperature 14°C (57°F)  

Max Temperature 22°C (72°F)  

Chance of Rain 27%  

Precipitation 98 mm (3.9 in)  

Rainy days 8 days  

Sunshine 231 hours *  

Percentage Sunshine *  

* Data from: Nantucket, the United States of America (50 KM, 31 Miles).

What to Wear in 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. And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.

What To Do in 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 Dennis's climate page.

More climate data for Dennis

Temperature Rainfall Sunshine

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