September Rainfall and Precipitation in Iowa
Iowa Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Iowa - and find the best time to visit. See also: Iowa weather by month.
Best Places to Visit in Iowa in September
Click on a destination dot for more details. Toggle the map to compare temperatures or precipitation across Iowa.
Monthly precipitation
0 mm (0 in) dry → 150 mm (5.9 in) wet
Marker color shows total monthly precipitation in September: pale blue is dry, deep blue is wet.
Iowa precipitation in September: frequently asked questions
How much rainfall does Iowa, the United States of America receive in September?
Rainfall in West Des Moines during September is on the lighter side, averaging about 80 mm (3.1 in). Expect predominantly dry weather punctuated by short showers.
How many days does it rain in Iowa, the United States of America in September?
Expect around 9 days rainy days in West Des Moines during September.
Is September part of the rainy season in Iowa, the United States of America?
No. September sits outside the typical rainy season in Iowa, the United States of America, so you can expect drier conditions overall.
What is the wettest city in September in Iowa, the United States of America?
Ames is the wettest city in Iowa, the United States of America in September according to our database, with average rainfall of around 106 mm (4.2 in).
What is the driest city in September in Iowa, the United States of America?
Sioux City is the driest city we have data for in Iowa, the United States of America in September, with monthly rainfall close to 70 mm (2.8 in).
Interested in more climate information?
We have much more information about the climate in Iowa.
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