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Lake Forest, Illinois

City in Lake County, Illinois

Air quality

The air at Lake Forest

Index 10, good, led by ozone. Read at 12 AM from its reporting area, Lake County (IL), 10 miles off.

10Good
  • Fine particles (PM2.5)7Good7.2 mi
  • Ozone10Good8 ppb7.2 mi
  • Coarse particles (PM10)-7.2 mi

The days ahead

Good each day through Mon Oct 19, led by fine particles. Yesterday measured 25, good.

Smoke, the next 43 hours

No smoke near the ground through Sat 7 PM.

FriSat

Precipitation

What has fallen at Lake Forest

0.29 in in the last 24 hours, 0.79 in over the last 3 days, to Fri 12 AM. Measured by radar and rain gauges, as water.

Last 24 hours
0.29in
Last 3 days
0.79in

Visibility

How far you can see at Lake Forest, the next 43 hours

Visibility stays 9 miles or more through Sat 7 PM, lowest 10 miles Fri 1 AM.

FriSat

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

What is measuring near here

The 6 instruments nearest Lake Forest, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 1.9 miles away.

measured now4 instruments

PalwaukeePWK

At an airfield/8.7 mi away/666 ft/11 ft below here

temp, wind, gust, visibility, precip, pressure

Rank10of 1,393

measured daily2 instruments

Lake Zurich (Hydro)LKZI2

At a cooperative observer's station/11.5 mi away/807 ft/130 ft above here

snowfall, snow depth, precip, high, low

Rank-

Station report

The weather at Palwaukee, drawn

The nearest airport reporting now, 8.7 mi from Lake Forest, Illinois. From its report of Oct 15, 2026, 11:52 PM local time: 3 of its 6 sheets.

The sky

Broken at 1,600 ft, broken at 2,400 ft, overcast at 2,900 ft; the ceiling is 1,600 ft; visibility 10 mi or more.

Section of the sky over Palwaukee, height above the station to scale: broken cloud with its base at 1,600 feet, broken cloud with its base at 2,400 feet, overcast cloud with its base at 2,900 feet, the ceiling at 1,600 feet, and visibility of 10 mi or more.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT PWKFIG. A THE SKY OVER PALWAUKEESECTION, 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 STATION01,0002,0003,0004,0005,000ETAGESLOWTHE STATIONTHE CEILOMETER READS TO 12,000 FT, ABOVE THIS SHEETOVC 2,900 FTOVERCAST, 8 EIGHTHS OF THE SKYBKN 2,400 FTBROKEN, 5 TO 7 EIGHTHS OF THE SKYBKN 1,600 FTBROKEN, 5 TO 7 EIGHTHS OF THE SKYCEILING 1,600 FTVISIBILITY, MILES: 10 MI OR MORE0510TITLEPalwaukee, the skySTATION REPORT · ASOS PWKTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-PWK-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 54.0 F, 83 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 1,200 ft up; the lowest cloud reported is at 1,600 ft.

Chart of the air at Palwaukee: temperature 59.0 degrees Fahrenheit and dew point 54.0, 83 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 1,200 feet above the station, against the lowest cloud reported at 1,600 feet; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT PWKFIG. B THE AIR AT PALWAUKEETHE 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 1,200 FT ABOVE THE STATION, AT 52.8 FLOWEST CLOUD REPORTED, BKN 1,600 FTTEMPERATURE 59.0 FDEW POINT 54.0 FSPREAD 5.0 FRELATIVE HUMIDITY 83 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 POINTTITLEPalwaukee, the airSTATION REPORT · ASOS PWKTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-PWK-2DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the west northwest (290 degrees) at 14 mph, gusting 23 mph: force 4, a moderate breeze on the Beaufort scale. The strongest gust today was 31 mph.

Plan of the wind at Palwaukee, north up: blowing from 290 degrees, the west northwest, at 14 miles an hour, gusting 23; beside it the Beaufort scale from calm to hurricane force, force 4, moderate breeze, marked.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT PWKFIG. C THE WIND AT PALWAUKEEPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 290°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE43GENTLE BREEZE84MODERATE BREEZE13NOW, 14 MPH5FRESH BREEZE19GUST, 23 MPH6STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEPalwaukee, the windSTATION REPORT · ASOS PWKTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-PWK-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

The full report of Palwaukee, 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 Lake Forest

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

Near Lake Forest

River and lake gauges