The highest day temperature in June 2025 was 74°F. The lowest night temperature was 53°F. The average values for day and night temperatures during June were 64.1°F и 62.0°F respectivly.

The average sea surface temperature in June 2025 for Siasconset was 59.4°F. The maximum and minimum values were 54.2°F and 67.0°F respectively.

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

Precipitation total in June for Siasconset is 0.6 in. It makes june the least rainy month of the year.

The average wind speed in June is 13.7 mph. It makes June one of the most windless months of the year for Siasconset.

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 Siasconset in June is 8.5 hours.