Weather in the USA in September 2017

Expect 26°C daytime maximum temperatures in the shade with on average 7 hours of sunshine per day in USA in September. Check more long-term weather averages for USA in September before you book your next holiday to USA in 2017. The September weather averages shown below are for Washington.

Key weather averages for USA in September

  • 26°C maximum daytime temperature in September in USA (Washington)26
    26°C max day temperature
  • 7 hours of sunshine per day (60% of daylight hours) in September in USA7
    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

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec All months

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

  • Book special offers on Virgin Atlantic flights to the USA
  • Flights depart from Heathrow, Gatwick, Manchester & Glasgow
  • Return flights to the USA from £399

Expires at 23:59 on Wednesday 20th September 2017 · View all Virgin Atlantic offers

More about USA

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec All months

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 2017

Browse the sunrise & sunset times for USA in September 2017. 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
Friday, 1st September 2017 05:37 18:38
Saturday, 2nd September 2017 05:38 18:36
Sunday, 3rd September 2017 05:39 18:35
Monday, 4th September 2017 05:40 18:33
Tuesday, 5th September 2017 05:41 18:32
Wednesday, 6th September 2017 05:42 18:30
Thursday, 7th September 2017 05:43 18:29
Friday, 8th September 2017 05:43 18:27
Saturday, 9th September 2017 05:44 18:25
Sunday, 10th September 2017 05:45 18:24
Monday, 11th September 2017 05:46 18:22
Tuesday, 12th September 2017 05:47 18:21
Wednesday, 13th September 2017 05:48 18:19
Thursday, 14th September 2017 05:49 18:17
Friday, 15th September 2017 05:50 18:16
Saturday, 16th September 2017 05:51 18:14
Sunday, 17th September 2017 05:51 18:13
Monday, 18th September 2017 05:52 18:11
Tuesday, 19th September 2017 05:53 18:09
Wednesday, 20th September 2017 05:54 18:08
Thursday, 21st September 2017 05:55 18:06
Friday, 22nd September 2017 05:56 18:05
Saturday, 23rd September 2017 05:57 18:03
Sunday, 24th September 2017 05:58 18:01
Monday, 25th September 2017 05:59 18:00
Tuesday, 26th September 2017 06:00 17:58
Wednesday, 27th September 2017 06:01 17:57
Thursday, 28th September 2017 06:01 17:55
Friday, 29th September 2017 06:02 17:54
Saturday, 30th September 2017 06:03 17:52
  • Book special offers on Virgin Atlantic flights to the USA
  • Flights depart from Heathrow, Gatwick, Manchester & Glasgow
  • Return flights to the USA from £399

Expires at 23:59 on Wednesday 20th September 2017 · View all Virgin Atlantic offers

Back to top

USA weather by month

Check USA weather for a particular month by selecting from the list below. Monthly weather guides include figures for temperature, rainfall, sunshine hours and sea temperature plus daily sunrise & sunset times.

Back to top

Popular USA destinations

More USA regions

All destinations (A to Z)

Can't see your chosen destination? Use our A to Z search to find your required the holiday weather guide:

A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  P  Q  R  S  T  U  V  W  X  Y  Z  

More destinations

Related posts

Popular travel offers

Top ^