| < September >
|Normal Max/ High Temperature
|Min/ Low Temperature
|Number of Wet Days (probability of rain on a day)
|Average Sunlight per day
|Average Daylight per day
|Sunny (Cloudy) Daylight Hours
|Sun altitude at solar noon on the 21st day.
- The average temperature in Saint Louis, Missouri in September is warm at 20.5 °C (68.9 °F).
- Afternoons can be hot with average high temperatures reaching 27 °C (80.6 °F).
- Overnight temperatures are generally mild with an average low of 14 °C (57.2 °F).
- The range/ variation of daily mean temperatures in September is 13 °C (23.4 °F).
- The weather in September is somewhat dry with sporadic rain. Just 71mm (2.8in) of liquid accrues across an average of 7 days.
- The skies in Saint Louis, Missouri are moderately sunny with on average a respectable 8:25 of radiant solar radiation daily.
- The shortest day is 11:46 long and the longest day is 13:00 long with an average length of 12:23.
- There are approximately 3:48 per day when bright sunshine is absent due to cloud, haze or the sun being too low on the horizon to register.
- It is sunny approximately 68.8% of daylight hours and cloudy 31.2% of daylight hours.
Check the distance to and compare the Saint Louis, Missouri September averages with somewhere beginning with:
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Weather Trend Graph for September in Saint Louis, Missouri, Usa
Navigate to September Weather in Locations Surrounding Saint Louis, Missouri:
- Carlinville, Il, Usa - 73.1 kms (45.4 miles) NE
- White Halle, Il, Usa - 43.3 kms (26.9 miles) NE
- Windsor, Il, Usa - 122.9 kms (76.4 miles) ENE
- Hillsboro, Il, Usa - 122.9 kms (76.4 miles) ENE
- St. Louis/ Lambert, Mo, Usa - 1.4 kms (0.9 miles) E
- Sparta, Il, Usa - 89.4 kms (55.6 miles) SE
- Farmington, Mo, Usa - 89.8 kms (55.8 miles) SSE