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Illinois barometric pressure today
Right now the highest pressure in Illinois is Springfield, 30.03 inHg (1017 hPa) and the lowest is Chicago, 29.92 inHg (1013 hPa). Values are sea-level pressure from 6 airport weather stations.
| City | Station | inHg | 3 h |
|---|---|---|---|
| Chicago, IL | KORD | 29.92 | ↘ -0.7 |
| Rockford, IL | KRFD | 29.97 | → steady |
| Peoria, IL | KPIA | 30.02 | ↘ -1.0 |
| Springfield, IL | KSPI | 30.03 | ↘ -1.4 |
| Champaign, IL | KCMI | 30.00 | ↘ -1.4 |
| Moline, IL | KMLI | 30.01 | ↘ -0.7 |
Elevation and pressure across Illinois
The cities here run from about 502 ft in Peoria to 738 ft in Champaign. On a standard day that means about 29.38 inHg of actual air pressure in Peoria and 29.13 inHg in Champaign. The readings above are corrected to sea level, so any difference between stations comes from the weather, not the height.
Highest point in Illinois · Sea-level vs station pressure · High vs low pressure
Frequently asked questions
What is the barometric pressure in Illinois today?
The live map and station board on this page show sea-level pressure at 6 weather stations across Illinois, including Chicago and Rockford. Each reading is the latest airport report, checked about every 10 minutes.
Why does a barometer in Champaign read lower than one in Peoria?
Elevation. Champaign sits at about 738 ft and Peoria at about 502 ft, a gap worth roughly 0.25 inHg of actual air pressure on a standard day. Forecasts correct for that, so the sea-level values here can be compared directly.
Is the pressure rising or falling in Illinois?
The last column of the station board shows the change over the last three hours, in hPa, for each station. Falling numbers usually mean clouds and rain are on the way; rising numbers mean clearing.