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East St. Louis, Illinois

City in St. Clair County, Illinois

Air quality

The air at East St. Louis

Index 23, good, led by ozone. Read at 11 PM from its reporting area, St. Louis (Metro-east) (IL), 8 miles off.

23Good
  • Fine particles (PM2.5)16Good2.3 mi
  • Ozone23Good14 ppb2.3 mi
  • Coarse particles (PM10)6Good4.5 mi
  • Nitrogen dioxide2Good2.6 ppb4.9 mi
  • Sulfur dioxide0Good0.9 ppb4.9 mi
  • Carbon monoxide-0.1 ppm4.9 mi

The days ahead

Highest moderate, today, led by fine particles. Yesterday measured 39, good.

Smoke, the next 45 hours

No smoke near the ground through Sat 7 PM.

FriSat

Precipitation

What has fallen at East St. Louis

0.56 in in the last 24 hours, 1.65 in over the last 3 days, to Thu 10 PM. Measured by radar and rain gauges, as water.

Last 24 hours
0.56in
Last 3 days
1.65in

Visibility

How far you can see at East St. Louis, the next 45 hours

Visibility stays 7 miles or more through Sat 7 PM, lowest 8 miles Fri 7 PM.

FriSat

On the radar over East St. Louis, IllinoisReflectivityStorm topsRain rateRain, last 24 hoursForecast temperatureForecast rain totalEvery picture

What is measuring near here

The 6 instruments nearest East St. Louis, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 1.6 miles away.

measured now4 instruments

measured daily2 instruments

East St. Louis 1.3 NWIL-SC-36

In a volunteer observer's own ground/1.6 mi away/423 ft/7 ft above here

precip, snowfall, snow depth

Rank-

Milstadt 2SWMSTI2

At a cooperative observer's station/12.1 mi away/656 ft/240 ft above here

snowfall, snow depth, precip, high, low

Rank33of 1,393

Station report

The weather at Cahokia/St Louis, drawn

The nearest airport reporting now, 3.6 mi from East St. Louis, Illinois. From its report of Oct 15, 2026, 11:21 PM local time: 3 of its 6 sheets.

The sky

Broken at 1,400 ft, overcast at 2,100 ft; the ceiling is 1,400 ft; visibility 10 mi or more.

Section of the sky over Cahokia/St Louis, height above the station to scale: broken cloud with its base at 1,400 feet, overcast cloud with its base at 2,100 feet, the ceiling at 1,400 feet, and visibility of 10 mi or more.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT CPSFIG. A THE SKY OVER CAHOKIA/ST LOUISSECTION, HEIGHT ABOVE THE STATION TO SCALE, EACH LAYER AT THE HEIGHT OF ITS BASE AS REPORTED; COVER IN EIGHTHS OF THE SKY; TOPS NOT MEASUREDFT ABOVE THE STATION05001,0001,5002,0002,5003,0003,500ETAGESLOWTHE STATIONTHE CEILOMETER READS TO 12,000 FT, ABOVE THIS SHEETOVC 2,100 FTOVERCAST, 8 EIGHTHS OF THE SKYBKN 1,400 FTBROKEN, 5 TO 7 EIGHTHS OF THE SKYCEILING 1,400 FTVISIBILITY, MILES: 10 MI OR MORE0510TITLECahokia/St Louis, the skySTATION REPORT · ASOS CPSTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-CPS-1DRAWN AS linework on paperSOURCES FB-SKY-001, FB-SKY-017, FB-SKY-016, FB-SKY-018

The air

64.0 F with a dew point of 57.0 F, 78 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 1,600 ft up; the lowest cloud reported is at 1,400 ft.

Chart of the air at Cahokia/St Louis: temperature 64.0 degrees Fahrenheit and dew point 57.0, 78 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 1,600 feet above the station, against the lowest cloud reported at 1,400 feet; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT CPSFIG. B THE AIR AT CAHOKIA/ST LOUISTHE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION01,0002,0003,00040 F50 F60 F70 FSATURATES 1,600 FT ABOVE THE STATION, AT 55.4 FLOWEST CLOUD REPORTED, BKN 1,400 FTTEMPERATURE 64.0 FDEW POINT 57.0 FSPREAD 7.0 FRELATIVE HUMIDITY 78 PER CENTTHE AIR COOLS ABOUT 5.4 F EACH 1,000 FT IT RISES, AND ITS DEW POINT ABOUT 1 FSOLID: THE LIFTED AIR'S TEMPERATURE; DASHED: ITS DEW POINTTITLECahokia/St Louis, the airSTATION REPORT · ASOS CPSTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-CPS-2DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the northwest (320 degrees) at 24 mph, gusting 41 mph: force 5, a fresh breeze on the Beaufort scale. The strongest gust today was 41 mph.

Plan of the wind at Cahokia/St Louis, north up: blowing from 320 degrees, the northwest, at 24 miles an hour, gusting 41; beside it the Beaufort scale from calm to hurricane force, force 5, fresh breeze, marked.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT CPSFIG. C THE WIND AT CAHOKIA/ST LOUISPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 320°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE43GENTLE BREEZE84MODERATE BREEZE135FRESH BREEZE19NOW, 24 MPH6STRONG BREEZE257NEAR GALE328GALE39GUST, 41 MPH9STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLECahokia/St Louis, the windSTATION REPORT · ASOS CPSTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-CPS-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

The full report of Cahokia/St Louis, in 6 sheets, each beside the Field Book plates that explain it

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Snow on the ground

Elsewhere in Illinois

23 places, each with its own forecast and its own instruments.

Near East St. Louis

The nearest places, each with its own forecast and the instruments nearest it.

Near East St. Louis

River and lake gauges