Oak Brook weather in September (Illinois, United States of America)

How is the weather in Oak Brook in September? Here's what the weather might have in store during this month.

In Oak Brook the weather in September is generally perfect, characterized by high temperatures and moderate rainfall. Anticipate daytime temperatures around 25°C, while night temperatures can drop to 13°C.

Oak Brook in September usually receives moderate rainfall, averaging around 87 mm for the month. When we look at the climate data from the last 30 years, we can expect around 10 days of rain.

With around 226 hours of sunshine, the days are mostly sunny. It gives a pleasant and vibrant feel to the area.

If you're inclined towards comfortable temperatures and drier conditions, September is a prime time to visit Oak Brook. September typically offers the best circumstances. While January, February, March, November and December tend to showcase less optimal conditions.

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

 

Oak Brook, monthly averages in September

Min Temperature 13°C  

Max Temperature 25°C  

Chance of Rain 34%  

Precipitation 87 mm  

Rainy days 10 days  

Humidity 71% *  

Windspeed 14 km/h *  

Sunshine 226 hours *  

Percentage Sunshine 60% *  

* Data from: Chicago, the United States of America (16 KM, 10 Miles).

Where to go in the United States of America in September

Find out more about the weather in the United States of America in September and which places have the best weather 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 Oak Brook in September?

For visitors traveling to Oak Brook, 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 in September.

Swimming

9/10

Cycling

9/10

Walking

9/10

Barbeque

8/10

Camping

8/10

Outdoor sports

9/10

Interested in more climate information?

Weather and Climate provides you with all the information you need about the climate in Oak Brook.

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 climate conditions. Find out where to go with our weather planner.