Typical Weather

Weather in Iowa City in September

How warm is it in Iowa City in September?

In September the typical daytime high in Iowa City is 25.6 °C on average, from 27.9 °C at the start to 22.8 °C at the end of the month.

That is 3.1 °C cooler than in August and 7.4 °C warmer than in October.

The last 10 years were 2.3 °C warmer than more than 40 years ago.

Click a day for more: afternoon and night, the usual range, records and how fast it is warming.

The average of the weather stations Cedar Rapids (43 km) and Rock Is L&D (82 km); nearer ones count more.