Temperature in Iowa in September

Iowa is a region in the United States of America. In September the average maximum daytime temperatures are high 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.

What is the temperature of the different cities in Iowa in September?

Curious about the September temperatures in the prime spots of Iowa? Navigate the map below and tap on a destination dot for more detailed stats.

Weather conditions Weather

Temperatures

Precipitation

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Legend

very warm

warm

pleasant

moderate

cold

very cold

Very warm means maximum temperatures above 30°C. Warm: 22°C to 30°C. Pleasant: 18°C to 22°C Moderate: 12°C to 18°C. Cold: 2°C to 12°C. Very cold: lower than 2°C

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Check the weather conditions for any month in the United States of America.

For a detailed overview of the weather over the year and the best time to visit the United States of America, check out our Iowa's climate page.

What is the warmest city in September in Iowa?

Based on our systematic data collection, Keokuk has been identified as the city with the highest average temperatures. The daytime temperature usually hovers around 26°C, while at night is goes down to an approximate temperature of 14°C."

What is the coldest city in September in Iowa?

In our database, Mason City is the chilliest city in September in Iowa. Daytime temperatures typically peak at 23°C, while the nighttime lows hover around 10°C.

How much sun does Iowa get in September?

Des Moines enjoys close to 240 hours of sunlight. This not only brightens the days but also uplifts the atmosphere during the month.

Interested in more climate information?

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.