Des Moines

Iowa Weather in September

Average temperatures, rainfall, sunshine and the best places to visit in Iowa, the United States of America in September.

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West Des Moines Ames Urbandale Ankeny

Planning a getaway to Iowa, the United States of America this September and curious about the weather you should prepare for? Discover all the vital details you need on this page, solving your puzzle:

What to Expect in Iowa in September

Iowa, the United States of America 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 (73°F) in Mason City to 26°C (79°F) in Keokuk. Nighttime temperatures generally drop to 14°C (57°F) in Keokuk and 10°C (50°F) in Mason City.

For a closer look at conditions across Iowa, the United States of America, refer to the map below.

Precipitation

In September, precipitation varies across different areas. From moderate rainfall in Sioux City with an average of 70 mm (2.8 in) to high rainfall in Ames with 106 mm (4.2 in).

Average sunshine

Most destinations offer generous amounts of sunshine this September. For example, West Des Moines gets approximately 240 hours of sunlight, perfect for anyone wanting bright, sunny days.

Explore Iowa by month

Pick a month to see the average temperature, rainfall and sunshine in Iowa — and find the best time to visit. (based on West Des Moines)

January-1°C (30°F) February0°C (32°F) March10°C (50°F) April17°C (63°F) May22°C (72°F) June28°C (82°F) This monthJuly30°C (86°F) August29°C (84°F) September25°C (77°F) October18°C (64°F) November10°C (50°F) December2°C (36°F)
Best Time to Visit Iowa →

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.

Conditions Temperatures Precipitation
perfect weather
pleasant
tolerable
unpleasant
poor

Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).

Popular Destinations in Iowa

What is the weather like in September for some of the most popular destinations in Iowa, the United States of America?

Temperature range in Iowa (September)

Precipitation variation in Iowa (September)

West Des Moines

In September West Des Moines generally has high temperatures with maximum daytime temperatures around 25°C (77°F), minimum nighttime temperatures around 13°C (55°F) and moderate monthly rainfall. So on average the conditions are perfect that month.

« August
September
October »
August
September
October
Max temperature
29°C (84°F)
25°C (77°F)
18°C (64°F)
Min temperature
18°C (64°F)
13°C (55°F)
6°C (43°F)
Monthly sun hours
299 hours
240 hours
212 hours
Monthly rainfall
116 mm (4.6 in)
80 mm (3.1 in)
69 mm (2.7 in)
Monthly rainy days
11 days
9 days
9 days
Weather conditions
pleasant
perfect
pleasant
Climate in West Des Moines →

Ames

In September Ames generally has high temperatures with maximum daytime temperatures around 25°C (77°F), minimum nighttime temperatures around 11°C (52°F) and high monthly rainfall. So on average the conditions are pleasant that month.

« August
September
October »
August
September
October
Max temperature
28°C (82°F)
25°C (77°F)
17°C (63°F)
Min temperature
16°C (61°F)
11°C (52°F)
4°C (39°F)
Monthly sun hours
299 hours
240 hours
212 hours
Monthly rainfall
137 mm (5.4 in)
106 mm (4.2 in)
77 mm (3 in)
Monthly rainy days
10 days
10 days
9 days
Weather conditions
pleasant
pleasant
tolerable
Climate in Ames →

Urbandale

In September Urbandale generally has high temperatures with maximum daytime temperatures around 25°C (77°F), minimum nighttime temperatures around 13°C (55°F) and moderate monthly rainfall. So on average the conditions are perfect that month.

« August
September
October »
August
September
October
Max temperature
29°C (84°F)
25°C (77°F)
18°C (64°F)
Min temperature
18°C (64°F)
13°C (55°F)
6°C (43°F)
Monthly sun hours
299 hours
240 hours
212 hours
Monthly rainfall
130 mm (5.1 in)
92 mm (3.6 in)
75 mm (3 in)
Monthly rainy days
11 days
9 days
10 days
Weather conditions
pleasant
perfect
pleasant
Climate in Urbandale →

Ankeny

In September Ankeny generally has high temperatures with maximum daytime temperatures around 25°C (77°F), minimum nighttime temperatures around 12°C (54°F) and moderate monthly rainfall. So on average the conditions are perfect that month.

« August
September
October »
August
September
October
Max temperature
29°C (84°F)
25°C (77°F)
18°C (64°F)
Min temperature
17°C (63°F)
12°C (54°F)
5°C (41°F)
Monthly sun hours
299 hours
240 hours
212 hours
Monthly rainfall
124 mm (4.9 in)
94 mm (3.7 in)
73 mm (2.9 in)
Monthly rainy days
11 days
9 days
9 days
Weather conditions
pleasant
perfect
pleasant
Climate in Ankeny →

Clive

In September Clive generally has high temperatures with maximum daytime temperatures around 25°C (77°F), minimum nighttime temperatures around 13°C (55°F) and moderate monthly rainfall. So on average the conditions are perfect that month.

« August
September
October »
August
September
October
Max temperature
29°C (84°F)
25°C (77°F)
18°C (64°F)
Min temperature
18°C (64°F)
13°C (55°F)
5°C (41°F)
Monthly sun hours
299 hours
240 hours
212 hours
Monthly rainfall
125 mm (4.9 in)
89 mm (3.5 in)
75 mm (3 in)
Monthly rainy days
11 days
9 days
10 days
Weather conditions
pleasant
perfect
pleasant
Climate in Clive →

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

Popular cities in September

Day & night temperatures, rainfall and average weather in Iowa in September.

City Weather Day temp Night temp Rainfall
West Des Moines 25°C (77°F) 13°C (55°F) 80 mm (3.1 in)
Ames 25°C (77°F) 11°C (52°F) 106 mm (4.2 in)
Urbandale 25°C (77°F) 13°C (55°F) 92 mm (3.6 in)
Ankeny 25°C (77°F) 12°C (54°F) 94 mm (3.7 in)
Clive 25°C (77°F) 13°C (55°F) 89 mm (3.5 in)
Cedar Falls 24°C (75°F) 11°C (52°F) 82 mm (3.2 in)

Iowa weather in September: frequently asked questions

What is the weather like in Iowa, the United States of America in September?

Iowa, the United States of America typically experiences perfect weather in September, part of the season. Daytime highs in West Des Moines average around 25°C (77°F), and temperatures drop to about 13°C (55°F) at night.

What is the average temperature in Iowa, the United States of America in September?

Average temperatures in Iowa, the United States of America during September range from a nighttime low near 13°C (55°F) to a daytime high around 25°C (77°F) in West Des Moines.

Does Iowa, the United States of America get a lot of rain in September?

Rain is generally moderate to light in Iowa, the United States of America during September, with West Des Moines averaging close to 80 mm (3.1 in).

Is September a Good Time to Visit Iowa, the United States of America?

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

Generally speaking, the best visiting conditions can be found in September offering mostly perfect weather in West 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.

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.

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