Weather in Rapid City in September 2017

Check the weather in Rapid City in September before you book your next holiday in South Dakota. Long-term weather averages give the best indication of the weather in September 2017 and include figures for temperature, sunshine and rainfall plus sunrise & sunset times for Rapid City, South Dakota, United States.

Weather in Rapid City in September

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

  • 23°C maximum daytime temperature in September in Rapid City23
    23°C max day temperature
  • 9 hours of sunshine per day (69% of daylight hours) in September in Rapid City9
    9 hours of sunshine per day
  • 7 days with some rainfall in September in Rapid City7
    7 days with some rainfall
  • 7°C minimum night-time temperature in September in Rapid City7
    7°C min night temperature
  • 12 hours of daylight per day in September in Rapid City12
    12 hours of daylight per day
  • No heat & humidity in September in Rapid City0
    No heat & humidity
  • 30 mm monthly rainfall in September in Rapid City30
    30 mm of monthly rainfall
  • UV (maximum) index 6 (High) in September in Rapid City6
    6 (High) UV index

The average maximum daytime temperature in Rapid City in September is a warm 23°C (73°F). There are usually 9 hours of bright sunshine each day, which represents 69% of the 12 hours of daylight.

Expect 30mm (1.2 inches) of rainfall across the whole of September with 7 days with some rain falling. Maximum UV levels will be high (6 UV index) at midday when the skies are clear. The average night-time temperature is usually a cold 7°C (45°F).

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

More about Rapid City weather

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Rapid City sunrise & sunset times for September 2017

Browse the sunrise & sunset times for Rapid City in September 2017. Select a month to view Rapid City sunrise & sunset times for the next twelve months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Friday, 1st September 2017 06:16 19:28
Saturday, 2nd September 2017 06:18 19:27
Sunday, 3rd September 2017 06:19 19:25
Monday, 4th September 2017 06:20 19:23
Tuesday, 5th September 2017 06:21 19:21
Wednesday, 6th September 2017 06:22 19:19
Thursday, 7th September 2017 06:23 19:17
Friday, 8th September 2017 06:24 19:16
Saturday, 9th September 2017 06:26 19:14
Sunday, 10th September 2017 06:27 19:12
Monday, 11th September 2017 06:28 19:10
Tuesday, 12th September 2017 06:29 19:08
Wednesday, 13th September 2017 06:30 19:06
Thursday, 14th September 2017 06:31 19:05
Friday, 15th September 2017 06:32 19:03
Saturday, 16th September 2017 06:34 19:01
Sunday, 17th September 2017 06:35 18:59
Monday, 18th September 2017 06:36 18:57
Tuesday, 19th September 2017 06:37 18:55
Wednesday, 20th September 2017 06:38 18:53
Thursday, 21st September 2017 06:39 18:52
Friday, 22nd September 2017 06:40 18:50
Saturday, 23rd September 2017 06:42 18:48
Sunday, 24th September 2017 06:43 18:46
Monday, 25th September 2017 06:44 18:44
Tuesday, 26th September 2017 06:45 18:42
Wednesday, 27th September 2017 06:46 18:40
Thursday, 28th September 2017 06:47 18:39
Friday, 29th September 2017 06:49 18:37
Saturday, 30th September 2017 06:50 18:35
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Rapid City weather by month

Check Rapid City 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.

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