Rehoboth Beach weather in September 2025

Q: How hot is it in Rehoboth Beach in September?

Daytime temperatures usually reach 26°C in Rehoboth Beach in September with low heat and humidity, falling to 15°C at night.

Q: How sunny is it in Rehoboth Beach in September?

There are normally 8 hours of bright sunshine each day in Rehoboth Beach in September - that's 60% of daylight hours.

Q: How warm is the sea around Rehoboth Beach in September?

The average sea temperature around Rehoboth Beach in September is 22°C.

Q: Does it rain in Rehoboth Beach in September?

There are usually 8 days with some rain in Rehoboth Beach in September and the average monthly rainfall is 86mm.

Q: What is the chance of a cyclone in Rehoboth Beach in September?

On average less than 1 day in September in Rehoboth Beach is likely to be affected by the passage of one or more tropical storms.

Expect 79°F daytime maximum temperatures in the shade with on average 8 hours of sunshine per day in Rehoboth Beach in September. Check more long-term weather averages for Rehoboth Beach in September before you book your next holiday to Delaware in 2025/2026.

79
79°F max day temperature
8
8 hours of sunshine per day
8
8 days with some rainfall
59
59°F min night temperature
12
12 hours of daylight per day
L
Low heat & humidity
3.4
3.4 inches of monthly rainfall
7
7 (High) UV index
72
72°F sea temperature

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The September weather guide for Delaware (Rehoboth Beach) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C) | Imperial (°F)

More about the USA

How hot is it in Rehoboth Beach in September?

Daytime temperatures usually reach 79°F in Rehoboth Beach in September with low heat and humidity, falling to 59°F at night.

How sunny is it in Rehoboth Beach in September?

There are normally 8 hours of bright sunshine each day in Rehoboth Beach in September - that's 60% of daylight hours.

How warm is the sea around Rehoboth Beach in September?

The average sea temperature around Rehoboth Beach in September is 72°F.

Does it rain in Rehoboth Beach in September?

There are usually 8 days with some rain in Rehoboth Beach in September and the average monthly rainfall is 3.4 inches.

What is the chance of a hurricane in Rehoboth Beach in September?

On average less than 1 day in September in Rehoboth Beach is likely to be affected by the passage of one or more tropical storms.

Rehoboth Beach September sunrise & sunset times

Browse the sunrise and sunset times for Rehoboth Beach in September 2025. Select a month to view Rehoboth Beach sunrise and sunset times for the next 12 months.

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Date	Sunrise times	Sunset times
Monday, 1st September 2025	05:30	18:30
Monday, 15th September 2025	05:42	18:08
Tuesday, 30th September 2025	05:56	17:44

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Delaware - quick facts
Flight time^✝	8 hours
Time difference	UK -5 hours
Language(s)	English
Currency	US Dollar
Electricity	A + B plug (120V)
Driving side	Right
Visa^✝	Yes
Tourist info	Delaware Tourism Office