Nantucket weather in September 2025

Expect daytime maximum temperatures of 21°C in Nantucket, Massachusetts in September based on long-term weather averages. There are 8 hours of sunshine per day on average with typically 86 mm of rainfall in the month.

  • 21°C maximum daytime temperature in September in Nantucket21
    21°C max day temperature
  • 8 hours of sunshine per day
  • 8 days with some rainfall in September in Nantucket8
    8 days with some rainfall
  • 14°C minimum night-time temperature in September in Nantucket14
    14°C min night temperature
  • 12 hours of daylight per day in September in Nantucket12
    12 hours of daylight per day
  • No heat & humidity in September in Nantucket0
    No heat & humidity
  • 86 mm monthly rainfall in September in Nantucket86
    86 mm of monthly rainfall
  • UV (maximum) index 6 (High) in September in Nantucket6
    6 (High) UV index
  • 18°C sea temperature in September in Nantucket18
    18°C sea temperature

More about Nantucket

Nantucket by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Recommended for Massachusetts

TUI: up to 7% off holidays booked online

  • Book online with TUI & save up to 7% on holidays
  • FREE child places available for select holidays
  • Pay £0 deposits with direct debit & spread the cost
Go to TUI deal >>

View all TUI offers

TUITUI deal finder

The September weather guide for Massachusetts (Nantucket) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C / mm)  |  Imperial (°F / inches)

Back to top

More about the USA

How hot is it in Nantucket in September?

Daytime temperatures usually reach 21°C in Nantucket in September, falling to 14°C at night.

How sunny is it in Nantucket in September?

There are normally 8 hours of bright sunshine each day in Nantucket in September - that's 60% of daylight hours.

How warm is the sea around Nantucket in September?

The average sea temperature around Nantucket in September is 18°C.

Does it rain in Nantucket in September?

There are usually 8 days with some rain in Nantucket in September and the average monthly rainfall is 86mm.

What is the chance of a hurricane in Nantucket in September?

On average less than 1 day in September in Nantucket is likely to be affected by the passage of one or more tropical storms.

Nantucket September sunrise & sunset times

Browse the sunrise and sunset times for Nantucket in September 2025. Select a month to view Nantucket sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 05:07 18:13
Monday, 15th September 2025 05:21 17:49
Tuesday, 30th September 2025 05:36 17:23

Related posts

Popular travel offers

Explore holidays in the sun for less

More holidays

Airport parking

More parking

Airport lounges

More lounges

Top ^