The highest day temperature in September 2024 was 80°F. The lowest night temperature was 54°F. The average values for day and night temperatures during September were 71.1°F и 61.3°F respectivly.

The average sea surface temperature in September 2024 for Jamestown was 70.2°F. The maximum and minimum values were 66.2°F and 73.6°F respectively.

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

Precipitation total in September for Jamestown is 1.3 in. This value is relatively stable throughout the year.

The average wind speed in September is 7.5 mph. This value is relatively stable throughout the year.

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 Jamestown in September is 7.5 hours.