The highest day temperature in September 2026 was 87°F. The lowest night temperature was 60°F. The average values for day and night temperatures during September were 75.4°F и 72.9°F respectivly.

The average sea surface temperature in September 2026 for Rehoboth Beach was 76.7°F. The maximum and minimum values were 67.8°F and 81.2°F respectively.

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

Precipitation total in September for Rehoboth Beach is 1.2 in. It makes september one of the most rainy months of the year.

The average wind speed in September is 10.5 mph.

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 Rehoboth Beach in September is 7.0 hours.