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Weather in September in Des Moines, Iowa

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< September >
 
Normal Max/ High Temperature 24°C (76°F)
 
Average Temperature 18°C (65°F)
 
Min/ Low Temperature 13°C (55°F)
 
Normal Precipitation 90mm (3.5in)
Number of Wet Days (probability of rain on a day) 8 (27%)
Average Sunlight per day 08:40
Average Daylight per day 12:25
Sunny (Cloudy) Daylight Hours 71% (29%)
Sun altitude at solar noon on the 21st day.
49°


  • The average temperature in Des Moines, Iowa in September is somewhat warm at 18.4 °C (65.12 °F).
  • Afternoons can be fairly hot with average high temperatures reaching 24.2 °C (75.6 °F).
  • Overnight temperatures are generally quite mild with an average low of 12.5 °C (54.5 °F).
  • The variation/ range of diurnal mean temperatures in September is 11.7 °C (21.1 °F).
  • The weather in September is dryish with intermittent rain. Just 89.7mm (3.5in) of H2O descends during on average 8 days.
  • The blue above Des Moines, Iowa is quite sunny having an average of a respectable 8:40 of gorgeous sunshine per day.
  • The shortest day is 11:44 long and the longest day is 13:06 long with an average length of 12:25.
  • There are approximately 3:34 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 70.8% of daylight hours and cloudy 29.2% of daylight hours.

Check the distance to and compare the Des Moines, Iowa September averages with somewhere beginning with:

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Weather Trend Graph for September in Des Moines, Iowa, Usa

Graph of weather in Des Moines, Iowa in September

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