Nantucket weather in September
Mild and comfortable, with occasional showers. Average highs of 20°C and lows of 18°C, with around 9 rainy days expected throughout the month.
While September isn't our top-rated month for Nantucket, it has its own appeal — typically lower prices, fewer crowds, and a more local feel.
Average high
20°C
Average low
18°C
Rainy days
9 days
Best months to visit
August
What to do in Nantucket in September
Whatever the weather, Nantucket rewards curious visitors. Here are some of the best ways to spend your time:
Explore
Dine
Culture
Nature
Shopping
Day trips
What to pack for September
Light layers work well — T-shirts and shorts for the day, a light jacket for evenings. Comfortable walking shoes are a must. Bring a compact umbrella just in case.
Browse other months
January
5C
Cold, with some rainy days.
February
4C
Cold, with some rainy days.
March
5C
Cold, with some rainy days.
April
9C
Cold, with some rainy days.
May
12C
Cool, with some rainy days.
June
17C
Cool, with some rainy days.
July
21C
Mild and comfortable, with occasional showers.
Recommended
August
22C
Mild and comfortable, with occasional showers.
September (you are here)
20C
Mild and comfortable, with occasional showers.
October
16C
Cool, with some rainy days.
November
12C
Cool, with some rainy days.
December
8C
Cold, with some rainy days.
Book your September trip to Nantucket
Find hotels, tours and experiences for the perfect escape.
