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Hartland, Illinois

Community in McHenry County, Illinois

Air quality

The air at Hartland

Index 12, good, led by ozone. Read at 1 AM from its reporting area, North and West Suburbs (Chicago) (IL), 17 miles off.

12Good
  • Fine particles (PM2.5)8Good-
  • Ozone12Good-
  • Coarse particles (PM10)5Good-

The days ahead

Good each day through Mon Oct 19, led by fine particles. Yesterday measured 32, good.

Smoke, the next 42 hours

No smoke near the ground through Sat 7 PM.

FriSat

Precipitation

What has fallen at Hartland

0.53 in in the last 24 hours, 0.69 in over the last 3 days, to Fri 1 AM. Measured by radar and rain gauges, as water.

Last 24 hours
0.53in
Last 3 days
0.69in

Visibility

How far you can see at Hartland, the next 42 hours

Visibility stays 8 miles or more through Sat 7 PM, lowest 9 miles Fri 2 AM.

FriSat

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

What is measuring near here

The 6 instruments nearest Hartland, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 1.2 miles away.

measured now4 instruments

De KalbDKB

At an airfield/31.2 mi away/915 ft/10 ft below here

temp, wind, gust, visibility, precip, pressure

Rank411of 1,393

measured daily2 instruments

Woodstock 5NWWODI2

At a cooperative observer's station/1.2 mi away/945 ft/20 ft above here

snowfall, snow depth, precip, high, low

Rank166of 1,393

Woodstock 1.9 WIL-MCH-14

In a volunteer observer's own ground/4.0 mi away/971 ft/46 ft above here

precip, snowfall, snow depth

Rank-

Station report

The weather at De Kalb, drawn

The nearest airport reporting now, 31.2 mi from Hartland, Illinois. From its report of Oct 16, 2026, 1:55 AM local time: 3 of its 6 sheets.

The sky

Overcast at 1,700 ft; the ceiling is 1,700 ft; visibility 10 mi or more.

Section of the sky over De Kalb, height above the station to scale: overcast cloud with its base at 1,700 feet, the ceiling at 1,700 feet, and visibility of 10 mi or more.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT DKBFIG. A THE SKY OVER DE KALBSECTION, 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 SKYCEILING 1,700 FTVISIBILITY, MILES: 10 MI OR MORE0510TITLEDe Kalb, the skySTATION REPORT · ASOS DKBTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-DKB-1DRAWN AS linework on paperSOURCES FB-SKY-001, FB-SKY-017, FB-SKY-016, FB-SKY-018

The air

51.8 F with a dew point of 48.2 F, 87 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 800 ft up; the lowest cloud reported is at 1,700 ft.

Chart of the air at De Kalb: temperature 51.8 degrees Fahrenheit and dew point 48.2, 87 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 800 feet above the station, against the lowest cloud reported at 1,700 feet; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT DKBFIG. B THE AIR AT DE KALBTHE 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 800 FT ABOVE THE STATION, AT 47.4 FLOWEST CLOUD REPORTED, OVC 1,700 FTTEMPERATURE 51.8 FDEW POINT 48.2 FSPREAD 3.6 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 POINTTITLEDe Kalb, the airSTATION REPORT · ASOS DKBTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-DKB-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 18 mph, gusting 24 mph: force 4, a moderate breeze on the Beaufort scale. The strongest gust today was 26 mph.

Plan of the wind at De Kalb, north up: blowing from 290 degrees, the west northwest, at 18 miles an hour, gusting 24; beside it the Beaufort scale from calm to hurricane force, force 4, moderate breeze, marked.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT DKBFIG. C THE WIND AT DE KALBPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 290°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE43GENTLE BREEZE84MODERATE BREEZE13NOW, 18 MPH5FRESH BREEZE19GUST, 24 MPH6STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEDe Kalb, the windSTATION REPORT · ASOS DKBTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-DKB-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

The full report of De Kalb, 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 Hartland

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

Near Hartland

River and lake gauges