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Weather in September in Des Moines, Iowa

< 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	08h 40'
	Average Daylight per day	12h 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 average temperatures in September is 11.7 °C (21.1 °F).
Precipitation averages for September are high with 89.7mm (3.5 in) recorded across 8 days.
In September the heavens above Des Moines, Iowa are quite sunny having an average of a respectable 8h 40' of brilliant sunshine per day.
The shortest day is 11h 44' long and the longest day is 13h 06' long with an average length of 12h 25'.
There are approximately 3h 34' per day when the sun is occluded by cloud, haze, fog etc.
It is sunny approximately 70.8% of daylight hours and cloudy 29.2% of daylight hours.

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

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