Delaware Weather & Climate: the United States of America

Climate by month across Delaware, the United States of America, average temperatures, rainfall and the best time to visit.

Climate overview of Delaware

Whether you're visiting Delaware in the United States of America during the peak of July (31°C (88°F)) or the cooler months around January (6°C (43°F)), knowing what to pack starts with understanding the local climate. Our overview is based on data from Dover, the region's most prominent city. For more detailed climate information about other cities in the area, please see the section beneath the map further down the page.

Delaware offers pleasant conditions in May, September and October, with temperatures typically ranging from 20°C (68°F) to 26°C (79°F).

The colder weather is most prominent in the months of January, February and December.

When it comes to rainfall, Delaware sees significant variations throughout the year. October tends to be the wettest, receiving 143 mm (5.6 in) of rain, while February is much drier with just 70 mm (2.8 in).

Explore Delaware by month

Pick a month to see the average temperature, rainfall and sunshine in Delaware - and find the best time to visit. (based on Dover)

Popular cities by month

Compare cities per month. Toggle cities on/off.

Dover Newark Seaford Harrington Christiana Delaware City
Day temperature (°C)
Monthly rainfall (mm)
Monthly sunshine (hours)

Climate map of Delaware

Average daily temperature, monthly rainfall & sunshine hours across cities.

Avg day temp (°C)
32°

Compare popular cities

Average daytime and nighttime temperatures, yearly rainfall and sunshine.

Dover 6°C (43°F) 31°C (88°F) -3°C (27°F) 21°C (70°F) 1220 mm (48 in)
Newark 5°C (41°F) 31°C (88°F) -5°C (23°F) 20°C (68°F) 1258 mm (50 in) 2,500 hours
Seaford 7°C (45°F) 31°C (88°F) -3°C (27°F) 21°C (70°F) 1250 mm (49 in)
Harrington 7°C (45°F) 31°C (88°F) -3°C (27°F) 20°C (68°F) 1217 mm (48 in)
Christiana 5°C (41°F) 31°C (88°F) -4°C (25°F) 20°C (68°F) 1246 mm (49 in) 2,500 hours
Delaware City 5°C (41°F) 31°C (88°F) -4°C (25°F) 20°C (68°F) 1248 mm (49 in) 2,500 hours

Places in Delaware, the United States of America

Select a city to see its average temperature, precipitation and hours of sunshine over the year.

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Bucket list

Need travel inspiration? Check out our bucket list articles and be inspired.