The highest day temperature in May 2026 was 87°F. The lowest night temperature was 42°F. The average values for day and night temperatures during May were 66.3°F и 52.6°F respectivly.

The average sea surface temperature in May 2026 for Jamestown was 54.0°F. The maximum and minimum values were 48.8°F and 61.0°F respectively.

You can expect various weather conditions during May. Be ready for sunny, cloudy or even gloomy days.

Precipitation total in May for Jamestown is 1.1 in.

The average wind speed in May is 8.6 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 May is 7.7 hours.