Rehoboth Beach (DE) Temperature by Month

The average annual maximum temperature in Rehoboth Beach, Delaware, United States of America is 19°C (66°F), with daytime highs ranging from 7°C (45°F) in January to 31°C (88°F) in July. This page covers monthly averages, day-night differences, and how Rehoboth Beach compares to cities worldwide.

The climate in Rehoboth Beach is dynamic, ranging widely from chilly in winter to very warm in summer. Nights are significantly colder, with lows dropping from 22°C (72°F) in July to -2°C (28°F) in January.

The chart below illustrates the average maximum day and minimum night temperatures in Rehoboth Beach by month:

The coldest point of the day usually falls between 4 AM and 6 AM, with temperatures peaking around 3 PM.

The chart below shows the average temperature throughout the year:

Rehoboth Beach's average annual maximum temperature is 19°C (66°F). To put that in context, here's how it compares to a few well-known destinations:

Lisbon, Portugal averages 21°C (70°F) annually, warm summers, mild winters, and rain mainly in the cooler months.

Zermatt, Switzerland averages just 4°C (39°F) annually due to its altitude, with very cold winters and cool summers even at its warmest.

Osaka, Japan averages 22°C (72°F) annually, with hot humid summers, mild winters, and pleasant spring and autumn seasons.

Melbourne, Australia averages 20°C (68°F) annually, known for unpredictable weather, with four seasons sometimes happening in one day.

Climate temperature data is typically calculated as a 30-year average. This smooths out year-to-year variability and gives a more reliable picture of what a place is actually like, rather than what happened in any single unusual year.

The readings come from a range of sources, land-based weather stations, ocean buoys, ships, and satellites. That data is collected by weather services around the world, then pooled, quality-checked, and averaged to produce the climate records you see here.

Whether a city sits on the coast or deep inland makes a significant difference to its climate. Coastal areas tend to have more stable temperatures year-round, large bodies of water absorb heat slowly in summer and release it gradually in winter, keeping extremes in check. Cities far from the sea don't benefit from that buffer, which is why continental climates tend to have hotter summers and colder winters than their coastal counterparts at the same latitude.

For more on Rehoboth Beach's weather, including monthly rainfall, sunshine hours, and humidity, visit our Rehoboth Beach climate page.