DeKalb weather in September (Illinois, United States of America)

How is September weather typically in DeKalb? Use this page to get an overview of the month’s weather conditions.

Temperatures

Experience perfect weather in DeKalb during September, featuring high temperatures and moderate rainfall. In the daytime, temperatures tend to hover near 24°C, cooling down at night to around 12°C.

Precipitation

DeKalb in September usually receives moderate rainfall, averaging around 76 mm for the month. Historically, the month has about 9 days of rain.

Average sunshine

The days are predominantly sunny, with an estimated total of around 226 hours of sunshine. These sun-filled days are perfect for spending time outside. Whether it's playing sports, visiting a park, or going for a bike ride.

If you favor pleasant temperatures and minimal rainfall, September is one of the better months to visit DeKalb. September typically offers the most agreeable circumstances. On the other hand, January, February, March, November and December tend to be characterized by conditions that may not be as optimal.

For an in-depth look at the yearly conditions, visit our specialized DeKalb climate page with graphs.

 

DeKalb, monthly averages in September

Min Temperature 12°C  

Max Temperature 24°C  

Chance of Rain 30%  

Precipitation 76 mm  

Rainy days 9 days  

Humidity 71% *  

Sunshine 226 hours *  

Percentage Sunshine 60% *  

* Data from: Chicago, the United States of America (70 KM, 43 Miles).

Where to go in the United States of America in September

Find out more about the weather in the United States of America and which places have the best travel conditions in this month.

Weather conditions Weather

Temperatures

Precipitation

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Legend perfect weather pleasant tolerable unpleasant poor

Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C and 29°C and not too much precipitation (less than 90 mm a month).

So, what should you wear in this month?

For visitors traveling to DeKalb, we recommend wearing layers. So maybe a skirt, t-shirt, shorts for during the day and jeans and a warm jacket for some days and evenings. Bring a rain jacket in case it rains during your stay. Plan on layering your clothes.

What To Do

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

Swimming

9/10

Cycling

9/10

Walking

9/10

Barbeque

8/10

Camping

8/10

Outdoor sports

9/10

Interested in more climate information?

This site provides you with all the information you need about the climate in DeKalb.

Our site offers climate and forecast data for every country in the world. Are you going to the United States of America? On this website you can find 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.