Nantucket weather in July 2025

Expect 77°F daytime maximum temperatures in the shade with on average 8 hours of sunshine per day in Nantucket in July. Check more long-term weather averages for Nantucket in July before you book your next holiday to Massachusetts in 2025/2026.

  • 77°F maximum daytime temperature in July in Nantucket77
    77°F max day temperature
  • 8 hours of sunshine per day
  • 9 days with some rainfall in July in Nantucket9
    9 days with some rainfall
  • 64°F minimum night-time temperature in July in Nantucket64
    64°F min night temperature
  • 15 hours of daylight per day in July in Nantucket15
    15 hours of daylight per day
  • No heat & humidity in July in Nantucket0
    No heat & humidity
  • 2.6 inches monthly rainfall in July in Nantucket2.6
    2.6 inches of monthly rainfall
  • UV (maximum) index 8 (Very High) in July in Nantucket8
    8 (Very High) UV index
  • 64°F sea temperature in July in Nantucket64
    64°F sea temperature

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The July 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)  |  Imperial (°F)

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How hot is it in Nantucket in July?

Daytime temperatures usually reach 77°F in Nantucket in July with no heat and humidity, falling to 64°F at night.

How sunny is it in Nantucket in July?

There are normally 8 hours of bright sunshine each day in Nantucket in July - that's 56% of daylight hours.

How warm is the sea around Nantucket in July?

The average sea temperature around Nantucket in July is 64°F.

Does it rain in Nantucket in July?

There are usually 9 days with some rain in Nantucket in July and the average monthly rainfall is 2.6 inches.

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

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

Nantucket July sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Tuesday, 1st July 2025 04:11 19:17
Wednesday, 16th July 2025 04:21 19:11
Thursday, 31st July 2025 04:35 18:58

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