Washington DC weather in September (United States of America)
Looking to travel to Washington DC in September? Check out this comprehensive weather guide.
In Washington DC, September is characterized by high temperatures and moderate rainfall. Throughout the day, temperatures typically settle at around 27°C. But by evening, they drop to around 17°C.
Washington DC in September usually receives moderate rainfall, averaging around 88 mm for the month. Typically around 9 days of rainfall is expected.
The days are predominantly sunny, with an estimated total of around 225 hours of sunshine. This amount of sunlight does not only brightens the days but also contributes to a cheerful ambiance in the area during this month.
If you're inclined towards comfortable temperatures and drier conditions, September is a prime time to visit Washington DC. April and September typically offer the best circumstances. While January, February and December tend to showcase less optimal conditions.
For an in-depth look at the yearly conditions, visit our specialized Washington DC climate page with graphs.
Washington DC, monthly averages in September
Min Temperature
17°C
Max Temperature
27°C
Chance of Rain
30%
Precipitation
88 mm
Rainy days
9 days
Humidity
68%
Windspeed
14 km/h
Sunshine
225 hours
Percentage Sunshine
60%
Where to go in the United States of America in September
Find out more about the weather in the United States of America in September and which places have the best weather conditions in this month.
perfect weather
pleasant
tolerable
unpleasant
poor
So, what should you wear in Washington DC in September?
It's going to be warm! Consider airy clothing, t-shirts, and other summer clothes. Shorts for men made of cotton or linen are good options for staying cool. However, there's a good chance of rain, so bring a raincoat just in case.What To Do
We rated the following activities from 1 (least suitable) to 10 (best) to do in September.
Interested in more climate information?
Weather and Climate provides you with all the information you need about the climate in Washington DC.
Our site offers climate and forecast data for every country in the world. Are you going to the United States of America? On this website you can find historical weather averages for many cities in the United States of America. Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal climate conditions. Find out where to go with our weather planner.
