USA weather in September 2019

  • 26°C maximum daytime temperature in September in USA (Washington)26
    26°C max day temperature
  • 7 hours of sunshine per day
  • 7 days with some rainfall in September in USA (Washington)7
    7 days with some rainfall
  • 15°C minimum night-time temperature in September in USA (Washington)15
    15°C min night temperature
  • 12 hours of daylight per day in September in USA (Washington)12
    12 hours of daylight per day
  • Low heat & humidity in September in USA (Washington)L
    Low heat & humidity
  • 87 mm monthly rainfall in September in USA (Washington)87
    87 mm of monthly rainfall
  • UV (maximum) index 7 (High) in September in USA (Washington)7
    7 (High) UV index
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The September weather guide for USA, represented by Washington, 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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Metric (°C / mm)  |  Imperial (°F / inches)

Guide to USA weather in September

The average maximum daytime temperature in USA in September is a warm 26°C (79°F) with low heat & humidity. The average night-time temperature is usually a comfortable 15°C (59°F). There are usually 7 hours of bright sunshine each day, which represents 60% of the 12 hours of daylight.

Expect 87mm (3.4 inches) of rainfall across the whole of September with 7 days with some rain falling. Maximum UV levels will be high (7 UV index) at midday when the skies are clear.

The weather in USA in September is represented by Washington.

USA sunrise & sunset times for September 2019

Browse the sunrise & sunset times for USA in September 2019. Select a month to view USA sunrise & sunset times for the next twelve months. The USA sunrise & sunset times shown below are for Washington.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Sunday, 1st September 2019 05:37 18:39
Sunday, 15th September 2019 05:49 18:17
Monday, 30th September 2019 06:03 17:53
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Below are average maximum temperatures at popular destinations in the USA in September. Select a destination to see more weather parameters.

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