Weather24Barometric pressure in Chicago today: right now
Right now in Chicago the barometric pressure is 29.71 inHg (1006 hPa): low, steady over the last 3 hours (−0.01 inHg). This time yesterday: 29.72 inHg; tomorrow the model expects 30.03 inHg.
low · 1006 hPa, as in forecasts
974 hPa · at about 870 ft, unadjusted
low: yesterday at 1 PM · high: Saturday 10/31 at 8 AM
Data for 2 AM local time. The first value is reduced to sea level; the barometer value is the pressure at the city’s height.
In the Weather24 app
How will the pressure affect you today?
Meteo-sensitivity from 0 to 10, hour by hour, and the “Rapid pressure drop” warning.
Pressure in Chicago: the past week and tomorrow
Hour by hour, at sea level, in inHg. Left of the amber line is the past 7 days, right of it the forecast.
- Sea-level pressure
- Standard, 29.92 inHg
- Now, 2 AM
- Forecast
- Biggest 24-hour change
- Now
- 29.71 inHglow
- Tomorrow, same time
- 30.03 inHg+0.32 inHg from now
- Biggest 24-hour change this week
- +0.32 inHgto Friday 10/30 at 8 AM
Chicago: lows crossing the Great Lakes
Chicago lies on the main storm track across the Midwest. In fall and winter, lows from the Plains or from Alberta pass over the Great Lakes every few days, so in the cold season pressure here changes often. A falling barometer followed by a sharp rise usually marks a cold front and a drop in temperature.
Sea level or barometer: 29.71 inHg and 28.77 inHg in Chicago
Pressure drops by about 0.1 inHg every 90 feet, so at about 870 ft the two numbers are far apart. If your barometer at home shows something close to 28.77 inHg, it is not a storm — it is the altitude.
In the Weather24 app you choose which one to see under “Pressure reference”: Local, the default, shows a value close to a barometer’s; Sea level shows the forecast value used on this page.
Pressure swings in Chicago and how you feel
Weather-sensitive people usually notice changes in pressure — especially a fast fall ahead of a front — more than the value itself. That is why it helps to watch the change over the last 3 hours and the last 24.
More in migraine and arthritis weather forecast.
This is weather information, not medical advice. If your symptoms are severe or new, talk to your doctor.
Barometric pressure in Chicago in the Weather24 app
The “Pressure” card with the reading and level where you are, the “Pressure over the day” chart with the standard-pressure line, the “Pressure” map layer with highs and lows, the “Rapid pressure drop” warning card and “Meteo-sensitivity”: a 0–10 score, hour by hour, with the reasons — pressure change, humidity, wind, temperature swings.
Barometric pressure in Chicago: FAQ
What is the barometric pressure in Chicago today?
What does a barometer read in Chicago?
Is the air pressure in Chicago high or low today?
What will the pressure be in Chicago tomorrow?
Where does the data come from?
Pressure in other cities
See also: rain radar Chicago · lightning map · UV index Chicago