Barometric Pressure in Oak Brook, United States 
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The pressure in Oak Brook, Illinois, United States is predicted to slowly drop over the next few hours, with an average pressure of 983.9 hPa today, which is lower than normal.
Weather prediction: Expect more wet and unsettled conditions
The daily total fluctuation in pressure in Oak Brook is 4.3 hPa, with a low of 981.9 hPa and a high of 986.2 hPa.
Forecast
Hourly Pressure Trends
Track the barometric pressure in Oak Brook hour by hour and stay informed about how it will change over the next 6 hours.
The barometric pressure in Oak Brook, Illinois, typically ranges from 29.80 to 30.40 inches. This is slightly above the national average. Weather systems moving into the region can cause pressure changes. A high-pressure system brings fair weather, while a low-pressure system brings rain or storms.
Oak Brook is a suburb of Chicago, located 17 miles west of downtown. The city is situated in the Midwest, where the Great Plains meet the Lake Michigan shoreline. This unique geography affects the atmospheric pressure. The city's proximity to Lake Michigan influences the air pressure, making it more unstable.
The surrounding landscape is flat to gently rolling, with some wooded areas. The terrain does not significantly block or disrupt air masses moving into the region. This allows weather systems to move freely, bringing changes in pressure. As a result, Oak Brook's weather can be quite dynamic.