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Summit, Illinois

Village in Cook County, Illinois

Air quality

The air at Summit

Index 20, good, led by fine particles. Read at 12 AM from its reporting area, South and West Suburbs (Chicago) (IL), 6 miles off.

20Good
  • Fine particles (PM2.5)20Good5.3 mi
  • Ozone9Good7 ppb5.3 mi
  • Coarse particles (PM10)-24.9 mi
  • Sulfur dioxide0Good0.5 ppb19 mi

The days ahead

Good each day through Mon Oct 19, led by fine particles. Yesterday measured 48, good.

Smoke, the next 43 hours

No smoke near the ground through Sat 7 PM.

FriSat

Precipitation

What has fallen at Summit

0.48 in in the last 24 hours, 0.77 in over the last 3 days, to Fri 12 AM. Measured by radar and rain gauges, as water.

Last 24 hours
0.48in
Last 3 days
0.77in

Visibility

How far you can see at Summit, the next 43 hours

Visibility stays 9 miles or more through Sat 7 PM, lowest 9 miles Fri 1 AM.

FriSat

On the radar over Summit, IllinoisReflectivityStorm topsRain rateRain, last 24 hoursForecast temperatureForecast rain totalEvery picture

What is measuring near here

The 6 instruments nearest Summit, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 2.0 miles away.

measured now4 instruments

ChicagoMDW

At an airfield/2.8 mi away/617 ft/6 ft above here

temp, wind, gust, visibility, precip, pressure

Rank4of 1,393

measured daily2 instruments

Station report

The weather at Chicago, drawn

The nearest airport reporting now, 2.8 mi from Summit, Illinois. From its report of Oct 15, 2026, 11:53 PM local time: 3 of its 6 sheets.

The sky

A few clouds at 1,200 ft, broken at 1,900 ft, overcast at 4,100 ft; the ceiling is 1,900 ft; visibility 10 mi or more.

Section of the sky over Chicago, height above the station to scale: a few clouds cloud with its base at 1,200 feet, broken cloud with its base at 1,900 feet, overcast cloud with its base at 4,100 feet, the ceiling at 1,900 feet, and visibility of 10 mi or more.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT MDWFIG. A THE SKY OVER CHICAGOSECTION, 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 STATION01,0002,0003,0004,0005,0006,0007,000ETAGESLOWMIDDLETHE STATIONTHE CEILOMETER READS TO 12,000 FT, ABOVE THIS SHEETOVC 4,100 FTOVERCAST, 8 EIGHTHS OF THE SKYBKN 1,900 FTBROKEN, 5 TO 7 EIGHTHS OF THE SKYFEW 1,200 FTA FEW CLOUDS, 1 TO 2 EIGHTHS OF THE SKYCEILING 1,900 FTVISIBILITY, MILES: 10 MI OR MORE0510TITLEChicago, the skySTATION REPORT · ASOS MDWTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-MDW-1DRAWN AS linework on paperSOURCES FB-SKY-001, FB-SKY-017, FB-SKY-016, FB-SKY-018

The air

59.0 F with a dew point of 55.0 F, 87 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 900 ft up; the lowest cloud reported is at 1,200 ft.

Chart of the air at Chicago: temperature 59.0 degrees Fahrenheit and dew point 55.0, 87 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 900 feet above the station, against the lowest cloud reported at 1,200 feet; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT MDWFIG. B THE AIR AT CHICAGOTHE 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 900 FT ABOVE THE STATION, AT 54.1 FLOWEST CLOUD REPORTED, FEW 1,200 FTTEMPERATURE 59.0 FDEW POINT 55.0 FSPREAD 4.0 FRELATIVE HUMIDITY 87 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 POINTTITLEChicago, the airSTATION REPORT · ASOS MDWTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-MDW-2DRAWN AS linework on paperSOURCES FB-WAT-020, FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the west northwest (290 degrees) at 17 mph, gusting 31 mph: force 4, a moderate breeze on the Beaufort scale. The strongest gust today was 32 mph.

Plan of the wind at Chicago, north up: blowing from 290 degrees, the west northwest, at 17 miles an hour, gusting 31; beside it the Beaufort scale from calm to hurricane force, force 4, moderate breeze, marked.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT MDWFIG. C THE WIND AT CHICAGOPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 290°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE43GENTLE BREEZE84MODERATE BREEZE13NOW, 17 MPH5FRESH BREEZE196STRONG BREEZE25GUST, 31 MPH7NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEChicago, the windSTATION REPORT · ASOS MDWTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-MDW-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

The full report of Chicago, in 6 sheets, each beside the Field Book plates that explain it

0in

Snow on the ground

Measured at Chicago Midway AP 3SW (MDWI2), 3.6 miles from here, read 14 Oct, 23:58. measured daily

Elsewhere in Illinois

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

Near Summit

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

Near Summit

River and lake gauges