The highest day temperature in July 2023 was 78°F. The lowest night temperature was 68°F. The average values for day and night temperatures during July were 73.4°F и 72.6°F respectivly.

The average sea surface temperature in July 2023 for Nantucket was 72.1°F. The maximum and minimum values were 68.4°F and 77.4°F respectively.

Most of the days in July are sunny but you can also expect cloudy and gloomy days.

Precipitation total in July for Nantucket is 1.2 in. It makes july one of the least rainy months of the year.

The average wind speed in July is 12.6 mph. It makes July the most windless month of the year for Nantucket.

We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for Nantucket in July is 8.9 hours.