The highest day temperature in July 2026 was 107°F. The lowest night temperature was 57°F. The average values for day and night temperatures during July were 85.5°F и 68.5°F respectivly.

The average sea surface temperature in July 2026 for Jamestown was 73.5°F. The maximum and minimum values were 70.8°F and 77.4°F respectively.

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

Precipitation total in July for Jamestown is 1.1 in.

The average wind speed in July is 7.6 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 July is 8.3 hours.