The highest day temperature in July 2026 was 104°F. The lowest night temperature was 59°F. The average values for day and night temperatures during July were 85.4°F и 67.2°F respectivly.

The average sea surface temperature in July 2026 for Plymouth was 68.9°F. The maximum and minimum values were 64.6°F and 72.0°F respectively.

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

Precipitation total in July for Plymouth is 1.0 in.

The average wind speed in July is 8.0 mph. It makes July one of the most windless months of the year for Plymouth.

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 Plymouth in July is 8.7 hours.