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Round Lake, Illinois

Village in Lake County, Illinois

Air quality

The air at Round Lake

Index 22, good, led by ozone. Read at 8 AM from its reporting area, Lake County (IL), 6 miles off.

22Good
  • Fine particles (PM2.5)18Good10.9 mi
  • Ozone22Good18 ppb10.9 mi
  • Coarse particles (PM10)-20.6 mi

The days ahead

Good each day through Mon Oct 19, led by fine particles. Yesterday measured 21, good.

Smoke, the next 41 hours

No smoke near the ground through Sun 1 AM.

FriSat

Precipitation

What has fallen at Round Lake

0.35 in in the last 24 hours, 0.53 in over the last 3 days, to Fri 8 AM. Measured by radar and rain gauges, as water.

Last 24 hours
0.35in
Last 3 days
0.53in

Visibility

How far you can see at Round Lake, the next 41 hours

Visibility stays 9 miles or more through Sun 1 AM, lowest 9 miles Fri 10 AM.

FriSat

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

What is measuring near here

The 6 instruments nearest Round Lake, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 2.2 miles away.

measured now4 instruments

WaukeganUGN

At an airfield/13.4 mi away/709 ft/59 ft below here

temp, wind, gust, visibility, precip, pressure

Rank25of 1,393

measured daily2 instruments

Fox River AT MchenryMHYI2

At a cooperative observer's station/7.9 mi away/738 ft/30 ft below here

snowfall, snow depth, precip, high, low

Rank-

Station report

The weather at Waukegan, drawn

The nearest airport reporting now, 13.4 mi from Round Lake, Illinois. From its report of Oct 16, 2026, 8:51 AM local time: 3 of its 6 sheets.

The sky

Broken at 1,000 ft, overcast at 1,700 ft; the ceiling is 1,000 ft; visibility 10 mi or more.

Section of the sky over Waukegan, height above the station to scale: broken cloud with its base at 1,000 feet, overcast cloud with its base at 1,700 feet, the ceiling at 1,000 feet, and visibility of 10 mi or more.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT UGNFIG. A THE SKY OVER WAUKEGANSECTION, 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 STATION05001,0001,5002,0002,5003,000ETAGESLOWTHE STATIONTHE CEILOMETER READS TO 12,000 FT, ABOVE THIS SHEETOVC 1,700 FTOVERCAST, 8 EIGHTHS OF THE SKYBKN 1,000 FTBROKEN, 5 TO 7 EIGHTHS OF THE SKYCEILING 1,000 FTVISIBILITY, MILES: 10 MI OR MORE0510TITLEWaukegan, the skySTATION REPORT · ASOS UGNTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-UGN-1DRAWN AS linework on paperSOURCES FB-SKY-001, FB-SKY-017, FB-SKY-016, FB-SKY-018

The air

49.0 F with a dew point of 47.0 F, 93 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 500 ft up; the lowest cloud reported is at 1,000 ft.

Chart of the air at Waukegan: temperature 49.0 degrees Fahrenheit and dew point 47.0, 93 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 500 feet above the station, against the lowest cloud reported at 1,000 feet; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT UGNFIG. B THE AIR AT WAUKEGANTHE 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 FSATURATES 500 FT ABOVE THE STATION, AT 46.5 FLOWEST CLOUD REPORTED, BKN 1,000 FTTEMPERATURE AND DEW POINT 49.0 F, 47.0 FRELATIVE HUMIDITY 93 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 POINTTITLEWaukegan, the airSTATION REPORT · ASOS UGNTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-UGN-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 8 mph: force 3, a gentle breeze on the Beaufort scale. The strongest gust today was 37 mph.

Plan of the wind at Waukegan, north up: blowing from 290 degrees, the west northwest, at 8 miles an hour; beside it the Beaufort scale from calm to hurricane force, force 3, gentle breeze, marked.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT UGNFIG. C THE WIND AT WAUKEGANPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 290°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE43GENTLE BREEZE8NOW, 8 MPH4MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEWaukegan, the windSTATION REPORT · ASOS UGNTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-UGN-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

The full report of Waukegan, 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 Round Lake

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

Near Round Lake

River and lake gauges