Weather in Washington in September 2018

  • 26°C maximum daytime temperature in September in Washington26
    26°C max day temperature
  • 7 hours of sunshine per day (60% of daylight hours) in September in Washington7
    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

Going to Washington? Find the best month to visit Washington based on the weather.

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Expect 26°C daytime maximum temperatures in the shade with on average 7 hours of sunshine per day in Washington in September. Check more long-term weather averages for Washington in September before you book your next holiday to D.C. in 2018.

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More about Washington

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

Guide to Washington weather in September

The average maximum daytime temperature in Washington 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.

Washington sunrise & sunset times for September 2018

Browse the sunrise & sunset times for Washington in September 2018. Select a month to view Washington sunrise & sunset times for the next twelve months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Saturday, 1st September 2018 06:37 19:38
Sunday, 2nd September 2018 06:38 19:37
Monday, 3rd September 2018 06:39 19:35
Tuesday, 4th September 2018 06:40 19:34
Wednesday, 5th September 2018 06:41 19:32
Thursday, 6th September 2018 06:41 19:31
Friday, 7th September 2018 06:42 19:29
Saturday, 8th September 2018 06:43 19:27
Sunday, 9th September 2018 06:44 19:26
Monday, 10th September 2018 06:45 19:24
Tuesday, 11th September 2018 06:46 19:23
Wednesday, 12th September 2018 06:47 19:21
Thursday, 13th September 2018 06:48 19:19
Friday, 14th September 2018 06:49 19:18
Saturday, 15th September 2018 06:49 19:16
Sunday, 16th September 2018 06:50 19:15
Monday, 17th September 2018 06:51 19:13
Tuesday, 18th September 2018 06:52 19:11
Wednesday, 19th September 2018 06:53 19:10
Thursday, 20th September 2018 06:54 19:08
Friday, 21st September 2018 06:55 19:07
Saturday, 22nd September 2018 06:56 19:05
Sunday, 23rd September 2018 06:57 19:03
Monday, 24th September 2018 06:58 19:02
Tuesday, 25th September 2018 06:58 19:00
Wednesday, 26th September 2018 06:59 18:59
Thursday, 27th September 2018 07:00 18:57
Friday, 28th September 2018 07:01 18:55
Saturday, 29th September 2018 07:02 18:54
Sunday, 30th September 2018 07:03 18:52
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