St Louis weather in September 2019

  • 27°C maximum daytime temperature in September in St Louis27
    27°C max day temperature
  • 8 hours of sunshine per day
  • 8 days with some rainfall in September in St Louis8
    8 days with some rainfall
  • 15°C minimum night-time temperature in September in St Louis15
    15°C min night temperature
  • 12 hours of daylight per day in September in St Louis12
    12 hours of daylight per day
  • Low heat & humidity in September in St LouisL
    Low heat & humidity
  • 78 mm monthly rainfall in September in St Louis78
    78 mm of monthly rainfall
  • UV (maximum) index 7 (High) in September in St Louis7
    7 (High) UV index

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

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Expect 27°C daytime maximum temperatures in the shade with on average 8 hours of sunshine per day in St Louis in September. Check more long-term weather averages for St Louis in September before you book your next holiday to Missouri in 2019/2020.

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More about St Louis

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The September weather guide for St Louis, Missouri 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.

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

Guide to St Louis weather in September

The average maximum daytime temperature in St Louis in September is a warm 27°C (81°F) with low heat & humidity. The average night-time temperature is usually a comfortable 15°C (59°F). There are usually 8 hours of bright sunshine each day, which represents 63% of the 12 hours of daylight.

Expect 78mm (3.1 inches) of rainfall across the whole of September with 8 days with some rain falling. Maximum UV levels will be high (7 UV index) at midday when the skies are clear.

St Louis sunrise & sunset times for September 2019

Browse the sunrise & sunset times for St Louis in September 2019. Select a month to view St Louis sunrise & sunset times for the next twelve months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Sunday, 1st September 2019 06:30 19:31
Monday, 2nd September 2019 06:31 19:30
Tuesday, 3rd September 2019 06:32 19:28
Wednesday, 4th September 2019 06:32 19:27
Thursday, 5th September 2019 06:33 19:25
Friday, 6th September 2019 06:34 19:23
Saturday, 7th September 2019 06:35 19:22
Sunday, 8th September 2019 06:36 19:20
Monday, 9th September 2019 06:37 19:19
Tuesday, 10th September 2019 06:38 19:17
Wednesday, 11th September 2019 06:39 19:16
Thursday, 12th September 2019 06:39 19:14
Friday, 13th September 2019 06:40 19:12
Saturday, 14th September 2019 06:41 19:11
Sunday, 15th September 2019 06:42 19:09
Monday, 16th September 2019 06:43 19:08
Tuesday, 17th September 2019 06:44 19:06
Wednesday, 18th September 2019 06:45 19:04
Thursday, 19th September 2019 06:46 19:03
Friday, 20th September 2019 06:47 19:01
Saturday, 21st September 2019 06:47 19:00
Sunday, 22nd September 2019 06:48 18:58
Monday, 23rd September 2019 06:49 18:57
Tuesday, 24th September 2019 06:50 18:55
Wednesday, 25th September 2019 06:51 18:53
Thursday, 26th September 2019 06:52 18:52
Friday, 27th September 2019 06:53 18:50
Saturday, 28th September 2019 06:54 18:49
Sunday, 29th September 2019 06:55 18:47
Monday, 30th September 2019 06:56 18:45
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