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Washington D.C. Weather in September

Averages By Month

September in Washington, D.C. is characterized by mild late summer temperatures ranging from 59°F during the night to 78°F during the day. The high humidity of the preceding summer months vanishes and encountering rain becomes less likely in September with only 11 rainy days. THe days are still sufficiently long and the sun shines for 7 hours a day.

September is the perfect month to explore Washington, D.C. by foot. The constantly mild weather conditions allow for enjoyable walks across the widespread National Mall. You might even encounter some Indian summer colored trees. The Congress is in session and can be observed by visitors in the Capitol Building.

High and Low Temperature in September °F

Rain Days in September

Current Weather Washington D.C.

35°F clear sky
Local Time

Hourly 10 Days

Averages Washington D.C.

  J F M A M J J A S O N D

High °F

42° 44° 53° 64° 75° 83° 87° 84° 78° 67° 55° 45°

Low °F

27° 28° 35° 44° 54° 63° 68° 66° 59° 48° 38° 29°

Daylight

5h 6h 7h 8h 9h 9h 9h 8h 8h 7h 5h 4h

Rain Days

12 9 11 11 13 11 14 12 11 9 10 9

Rain (inch)

3.1 3.2 3.2 3.2 4.1 3.2 4.1 4.9 3.8 3.1 2.8 2.8

Washington D.C. Weather by Month

Best Time to visit Washington D.C.

In terms of weather, spring and fall might be the best time for a city trip to Washington D.C.. The temperatures during the day at around 65°F to 70°F are perfect for a walk through the National Mall park. From the end of March to the middle of April, the cherry blossom season attracts lots of tourists and is a sight to behold. You can expect more rain during spring than in fall. In fall however you can enjoy Indian summer colored trees. Though July is hot and wet, it is a popular time to visit Washington, D.C. for the 4th of July celebrations.

Things to know about Washington D.C.

Washington, D.C. is the capital of the United States and is home to the president who resides in the White House on Pennsylvania Avenue. It is also home to Congress which sits and goes about its business in the United States Capitol in Capitol Hill. For people on vacation, Washington, D.C. offers more than 60 museums and more than 70 historical sights as well as all kinds of shopping options. It is also features several famous colleges and is a popular city with students.

The top 10 sights in Washington, D.C. are:

The Washington Monument

The National Mall and The Lincoln Memorial

The Washington Monument
Washington Lincoln Memorial


The U.S. Capitol and The National Air and Space Museum
Washington the Capitol
Washington National Air and Space Museum


The Smithsonian American Art Museum and Georgetown
Washington Smithsonian Institution building
Washington Georgetown


The White House and Potomac River
Washington white house
Washington John Kennedy Center for the performin arts


and... The Pentagon

Washington D.C. Location

Other destinations in September



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