Washington weather in September 2021

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26
26°C max day temperature
7
7 hours of sunshine per day
7
7 days with some rainfall
15
15°C min night temperature
12
12 hours of daylight per day
L
Low heat & humidity
87
87 mm of monthly rainfall
7
7 (High) UV index

Recommended for D.C.

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The September weather guide for Washington, D.C. shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

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How hot is it in Washington in September?

Daytime temperatures usually reach 26°C in Washington in September with low heat and humidity, falling to 15°C at night.

How sunny is it in Washington in September?

There are normally 7 hours of bright sunshine each day in Washington in September - that's 60% of daylight hours.

Does it rain in Washington in September?

There are usually 7 days with some rain in Washington in September and the average monthly rainfall is 87mm.

What is the chance of a hurricane in Washington in September?

On average less than 1 day in September in Washington is likely to be affected by the passage of one or more tropical storms.

Metric (°C / mm) | Imperial (°F / inches)

Washington sunrise & sunset times for September 2021

Browse the sunrise and sunset times for Washington in September 2021. Select a month to view Washington sunrise & sunset times for the next 12 months.

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