Washington weather in September 2021

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  • 26°C maximum daytime temperature in September in Washington26
    26°C max day temperature
  • 7 hours of sunshine per day
  • 7 days with some rainfall in September in Washington7
    7 days with some rainfall
  • 15°C minimum night-time temperature in September in Washington15
    15°C min night temperature
  • 12 hours of daylight per day in September in Washington12
    12 hours of daylight per day
  • Low heat & humidity in September in WashingtonL
    Low heat & humidity
  • 87 mm monthly rainfall in September in Washington87
    87 mm of monthly rainfall
  • UV (maximum) index 7 (High) in September in Washington7
    7 (High) UV index

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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.

Washington sunrise & sunset times for September 2021

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Wednesday, 1st September 2021 06:37 19:38
Wednesday, 15th September 2021 06:50 19:16
Thursday, 30th September 2021 07:03 18:52
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Metric (°C / mm)  |  Imperial (°F / inches)

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