Washington weather in September (District of Columbia, United States of America)

Interested in knowing the climate of Washington in September? Wondering about the weather this month? Our guide has all the details you need.

Temperatures

Experience perfect weather in Washington in September, 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.

Precipitation

Washington in September usually receives moderate rainfall, averaging around 94 mm for the month. Looking at the last 30 years, the data shows about 9 days with rain.

Average sunshine

Expect sunny days throughout the month, with an estimated 225 hours of sunshine. Making it a pleasant time to visit Washington.

So this is a great month to visit if you prefer dry days with pleasant temperatures. April and September typically offer the most optimal weather. In contrast, January, February and December tend to have less optimal conditions.

For an in-depth look at the yearly conditions, visit our specialized Washington climate page with graphs.

 

Washington, monthly averages in September

Min Temperature 17°C  

Max Temperature 27°C  

Chance of Rain 30%  

Precipitation 94 mm  

Rainy days 9 days  

Humidity 68% *  

Windspeed 14 km/h *  

Sunshine 225 hours *  

Percentage Sunshine 60% *  

Data from: Washington DC, the United States of America (5 KM, 3 Miles).

Where to go in the United States of America in September

Find out more about the weather in the United States of America and which places have the best travel conditions in this month.

Weather conditions Weather

Temperatures

Precipitation

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Legend perfect weather pleasant tolerable unpleasant poor

Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C and 29°C and not too much precipitation (less than 90 mm a month).

So, what should you wear in this month?

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.

Swimming

9/10

Cycling

7/10

Walking

7/10

Camping

8/10

Outdoor sports

7/10

Interested in more climate information?

This site provides you with all the information you need about the climate in Washington.

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 travel conditions. Find out where to go with our weather planner.