What is the Weather in Chicago in September

This post is an overview of the September weather in Chicago, including snow and precipitation forecasts, as well as tips on how to dress and things to do.


HOW COLD IS CHICAGO IN SEPTEMBER?

This month turns out to be a very pleasant month as far as temperatures, with less rainy days than in August.

The long summer days are behind us now. Often the thermometer will reach over 60 °F (16 °C) in Chicago, with an average high of 75 °F (24 °C) and low of 54 °F (12 °C).

  Average Temperatures in Chicago in September

 


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HOW MUCH SUN AND RAIN?

In September, the city experiences less wind and less rain! There is a steep decline in stormy weather after the summer thunderstorms of August, and rainfall only adds up to 3.2 inches (82 mm) of rain over the course of about 8 rainy days.

The sun shines for an average of 12 hours and 27 minutes a day, with about 9 clear days throughout the month. The average humidity during August is 71%, with the mornings reaching up to 85% humidity, and letting up throughout the day to around 55%

How much Sun in Chicago in September

 


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WHAT TO WEAR IN SEPTEMBER?

Chicago in September can be a little unpredictable, and you will want to reflect that in your wardrobe.

Be sure to still pack comfortable, light-weight clothing for the warmer days and hours of this month, especially in the early days of September. The temperatures begin to cool during the evening hours, as well as later in the month, so you will want to be prepared with layers.

Sunblock and comfortable walking shoes are still essential this month, as there are many great outdoor activities and beautiful parts of the city to explore with our walking tours. Throw a water bottle in as well, so you can stay hydrated during your Chicago adventure

What to wear in September in Chicago

 


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WHAT TO DO IN CHICAGO IN SEPTEMBER?

Below are the top things to do in September in Chicago. But, be sure to read our full post on what to do in Chicago in September which includes free things to do, night and family-friendly activities and attractions, as well as our definitive post on the best things to do in Chicago.

And if you are planning on visiting many of Chicago’s top attractions, then you should consider a tourist discount pass as you could save up to 50% of retail ticket prices to tours, attractions, and restaurants.

 

City Passes Chicago

 
Be sure to check out all the top things to do in  September in our main post.


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Fred Pickhardt
Ocean Weather Services