The highest day temperature in January 2026 was 54°F. The lowest night temperature was 16°F. The average values for day and night temperatures during January were 37.0°F и 31.6°F respectivly.

The average sea surface temperature in January 2026 for Rehoboth Beach was 38.4°F. The maximum and minimum values were 35.0°F and 40.8°F respectively.

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

Precipitation total in January for Rehoboth Beach is 1.1 in.

The average wind speed in January is 12.2 mph. It makes January the most windy month of the year for Rehoboth Beach.

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 January is 5.9 hours.