Weather in D.C. in September 2018

  • 26°C maximum daytime temperature in September in D.C. (Washington)26
    26°C max day temperature
  • 7 hours of sunshine per day (60% of daylight hours) in September in D.C.7
    7 hours of sunshine per day
  • 7 days with some rainfall in September in D.C. (Washington)7
    7 days with some rainfall
  • 15°C minimum night-time temperature in September in D.C. (Washington)15
    15°C min night temperature
  • 12 hours of daylight per day in September in D.C. (Washington)12
    12 hours of daylight per day
  • Low heat & humidity in September in D.C. (Washington)L
    Low heat & humidity
  • 87 mm monthly rainfall in September in D.C. (Washington)87
    87 mm of monthly rainfall
  • UV (maximum) index 7 (High) in September in D.C. (Washington)7
    7 (High) UV index

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Expect 26°C daytime maximum temperatures in the shade with on average 7 hours of sunshine per day in D.C. in September. Check more long-term weather averages for D.C. in September before you book your next holiday to D.C. in 2018/2019. The September weather averages shown above are for Washington.

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More about D.C.

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

Guide to D.C. weather in September

The average maximum daytime temperature in D.C. 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 D.C. in September is represented by Washington.

D.C. sunrise & sunset times for September 2018

Browse the sunrise & sunset times for D.C. in September 2018. Select a month to view D.C. sunrise & sunset times for the next twelve months. The D.C. sunrise & sunset times shown below are for Washington.

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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