Iowa City Weather in September

With daytime temperatures of 25°C (77°F) and nighttime lows of 12°C (54°F), September in Iowa City brings high temperatures during the day. Do keep in mind that quite a bit of rainfall is typical. Around 81 mm (3.2 in) falls on average.

Rainfall in Iowa City in September

You can typically expect 7 days of rain this month, averaging around 81 mm (3.2 in). When it rains this month, it tends to come down fairly heavily. Showers can be substantial even if they don't last all day.

Temperature in Iowa City in September

The temperature in Iowa City in September is perfect. Daytime highs reach 25°C (77°F), with nights dropping to 12°C (54°F). This kind of day-to-night contrast is typical for this time of year. Nights cool down to 12°C (54°F), so a light jacket or extra layer is useful once the sun goes down. On the plus side, the cooler nights make for comfortable sleeping conditions.

If you're inclined towards comfortable temperatures and drier conditions, September is a good time to visit Iowa City.

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Check the conditions for any month of the year.

• January
• February
• March
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• May
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• October
• November
• December

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

Iowa City Temperature in September

Min Temperature 12°C (54°F)  

Max Temperature 25°C (77°F)  

Chance of Rain 24%  

Precipitation 81 mm (3.2 in)  

Rainy days 7 days  

What to Wear in Iowa City in September

Warm temperatures in September make for comfortable sightseeing weather. Pack breathable fabrics like cotton shirts, knee-length shorts or skirts, and comfortable walking shoes. A thin long sleeve for indoor spaces is handy. Prepare for significant rainfall with proper waterproof clothing and shoes.

What To Do in Iowa City in September

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Cycling

7/10

Walking

7/10

Camping

8/10

Outdoor sports

7/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

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

More climate data for Iowa City

Temperature Rainfall

See the full Iowa City climate overview or explore weather in the United States of America.