Weather in Evanston in September
How warm is it in Evanston in September?
In September the typical daytime high in Evanston is 24.1 °C on average, from 26.4 °C at the start to 21.1 °C at the end of the month.
That is 3.4 °C cooler than in August and 7.4 °C warmer than in October.
The last 10 years were 2.1 °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 Rock Is L&D (245 km) and Green Bay (275 km); nearer ones count more.