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Weather in September in Iowa

Are you planning a trip a to Iowa in September and wondering what kind of weather to expect? This page has all the details you need.

What is the weather like in Iowa in September?

Iowa is a region in the United States of America. September in Iowa generally has warm temperatures, with precipitation levels ranging from moderate to high.

Temperatures

The average maximum temperatures are warm and range from 23°C in Mason City to 26°C in Keokuk. Nighttime temperatures generally drop to 14°C in Keokuk and 10°C in Mason City.

Precipitation

In September, precipitation varies across different areas. From moderate rainfall in Sioux City with an average of 70 mm to high rainfall in Ames with 106 mm.

Average sunshine

Meanwhile, Des Moines enjoys approximately 240 hours of sunshine, offering a mostly sunny climate that adds a pleasant and vibrant feel to the month.

To learn more about the conditions in specific areas of Iowa in September, check out the map below. For more details on the yearly weather, visit our Iowa climate page.

Where to go in Iowa in September

Find more information for the most popular destinations in the Iowa on the map below. Click on a destination dot for more detailes.

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Legend perfect weather pleasant tolerable unpleasant poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C and 29°C and not too much precipitation (less than 90 mm a month).

Popular destinations

What is the weather like in September for the 5 most popular destinations in Iowa?

Des Moines

In September Des Moines generally has high temperatures with maximum daytime temperatures around 25°C, minimum nighttime temperatures around 13°C and moderate monthly rainfall. So on average the conditions are perfect that month.

Des Moines
minimum temparatureMax temperature minimum temparatureMax temp
maximum temparatureMin temperature maximum temparatureMin temp
sun hoursMonthly sun hours sun hoursSun hours
precipitationMonthly rainfall precipitationRainfall
rain daysMonthly rainy days rain daysRainy days
conditionsWeather conditions conditionsWeather
<<   August August
<<  
29°C 
18°C 
299 hours 
121 mm 
11 days 
25°C 
13°C 
240 hours 
86 mm 
9 days 
October   >> October
>>  
18°C 
6°C 
212 hours 
69 mm 
9 days 
Climate in Des Moines

West Des Moines

In September West Des Moines generally has high temperatures with maximum daytime temperatures around 25°C, minimum nighttime temperatures around 13°C and moderate monthly rainfall. So on average the conditions are perfect that month.

West Des Moines
minimum temparatureMax temperature minimum temparatureMax temp
maximum temparatureMin temperature maximum temparatureMin temp
sun hoursMonthly sun hours sun hoursSun hours
precipitationMonthly rainfall precipitationRainfall
rain daysMonthly rainy days rain daysRainy days
conditionsWeather conditions conditionsWeather
<<   August August
<<  
29°C 
18°C 
299 hours 
116 mm 
11 days 
25°C 
13°C 
240 hours 
80 mm 
9 days 
October   >> October
>>  
18°C 
6°C 
212 hours 
69 mm 
9 days 
Climate in West Des Moines

Ames

In September Ames generally has high temperatures with maximum daytime temperatures around 25°C, minimum nighttime temperatures around 11°C and high monthly rainfall. So on average the conditions are pleasant that month.

Ames
minimum temparatureMax temperature minimum temparatureMax temp
maximum temparatureMin temperature maximum temparatureMin temp
sun hoursMonthly sun hours sun hoursSun hours
precipitationMonthly rainfall precipitationRainfall
rain daysMonthly rainy days rain daysRainy days
conditionsWeather conditions conditionsWeather
<<   August August
<<  
28°C 
16°C 
299 hours 
137 mm 
10 days 
25°C 
11°C 
240 hours 
106 mm 
10 days 
October   >> October
>>  
17°C 
4°C 
212 hours 
77 mm 
9 days 
Climate in Ames

Urbandale

In September Urbandale generally has high temperatures with maximum daytime temperatures around 25°C, minimum nighttime temperatures around 13°C and moderate monthly rainfall. So on average the conditions are perfect that month.

Urbandale
minimum temparatureMax temperature minimum temparatureMax temp
maximum temparatureMin temperature maximum temparatureMin temp
sun hoursMonthly sun hours sun hoursSun hours
precipitationMonthly rainfall precipitationRainfall
rain daysMonthly rainy days rain daysRainy days
conditionsWeather conditions conditionsWeather
<<   August August
<<  
29°C 
18°C 
299 hours 
130 mm 
11 days 
25°C 
13°C 
240 hours 
92 mm 
9 days 
October   >> October
>>  
18°C 
6°C 
212 hours 
75 mm 
10 days 
Climate in Urbandale

Ankeny

In September Ankeny generally has high temperatures with maximum daytime temperatures around 25°C, minimum nighttime temperatures around 12°C and moderate monthly rainfall. So on average the conditions are perfect that month.

Ankeny
minimum temparatureMax temperature minimum temparatureMax temp
maximum temparatureMin temperature maximum temparatureMin temp
sun hoursMonthly sun hours sun hoursSun hours
precipitationMonthly rainfall precipitationRainfall
rain daysMonthly rainy days rain daysRainy days
conditionsWeather conditions conditionsWeather
<<   August August
<<  
29°C 
17°C 
299 hours 
124 mm 
11 days 
25°C 
12°C 
240 hours 
94 mm 
9 days 
October   >> October
>>  
18°C 
5°C 
212 hours 
73 mm 
9 days 
Climate in Ankeny

Is your destination not in the list? Have a look at other destinations in Iowa, in the United States of America.

Is September the best time to visit Iowa?

We believe that September is one of the best times to visit Iowa with overall perfect weather in Des Moines.

Generally speaking, the best visiting conditions can be found in September offering mostly perfect weather in Des Moines. On the other hand, the weather in January, February, March, November and December tend to be poor.

Interested in more climate information?

We have much more information about the climate in Iowa. Interested in the weather conditions in a specific month? Select the month below.

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  • Weather and climate has detailed information for every country in the world. Are you going to the United States of America? Get detailed historical weather averages for many cities in the United States of America.

    Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal travel conditions. Find out where to go with our weather planner.