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Hillsboro, Illinois

City in Montgomery County, Illinois

Air quality

The air at Hillsboro

Index 23, good, led by ozone. Read at 11 PM from its reporting area, St. Louis (Metro-east) (IL), 47 miles off.

23Good
  • Fine particles (PM2.5)16Good-
  • Ozone23Good6 ppb24.1 mi
  • Coarse particles (PM10)6Good-

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 Hillsboro

0.96 in in the last 24 hours, 1.05 in over the last 3 days, to Thu 10 PM. Measured by radar and rain gauges, as water.

Last 24 hours
0.96in
Last 3 days
1.05in

Visibility

How far you can see at Hillsboro, the next 45 hours

Visibility stays 4 miles or more through Sat 7 PM, lowest 4 miles Fri 3 PM.

FriSat

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

What is measuring near here

The 5 instruments nearest Hillsboro, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 0.5 miles away.

measured now3 instruments

Litchfield3LF

At an airfield/9.9 mi away/689 ft/91 ft above here

temp, wind, gust, visibility, precip, pressure

Rank9of 1,393

measured daily2 instruments

HillsboroHLBI2

At a cooperative observer's station/0.5 mi away/653 ft/55 ft above here

snowfall, snow depth, precip, high, low

Rank1,344of 1,393

Litchfield 0.4 ENEIL-MY-14

In a volunteer observer's own ground/8.8 mi away/684 ft/86 ft above here

precip, snowfall, snow depth

Rank-

Station report

The weather at Litchfield, drawn

The nearest airport reporting now, 9.9 mi from Hillsboro, Illinois. From its report of Oct 15, 2026, 11:15 PM local time: 3 of its 6 sheets.

The sky

Overcast at 600 ft; the ceiling is 600 ft; visibility 4 mi.

Section of the sky over Litchfield, height above the station to scale: overcast cloud with its base at 600 feet, the ceiling at 600 feet, and visibility of 4 mi.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT 3LFFIG. A THE SKY OVER LITCHFIELDSECTION, 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 600 FTOVERCAST, 8 EIGHTHS OF THE SKYCEILING 600 FTVISIBILITY, MILES: 4 MI0510TITLELitchfield, the skySTATION REPORT · ASOS 3LFTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-3LF-1DRAWN AS linework on paperSOURCES FB-SKY-001, FB-SKY-017, FB-SKY-016, FB-SKY-018

The air

60.0 F with a dew point of 58.3 F, 94 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 400 ft up; the lowest cloud reported is at 600 ft.

Chart of the air at Litchfield: temperature 60.0 degrees Fahrenheit and dew point 58.3, 94 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 400 feet above the station, against the lowest cloud reported at 600 feet; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT 3LFFIG. B THE AIR AT LITCHFIELDTHE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION01,0002,0003,00050 F60 F70 FSATURATES 400 FT ABOVE THE STATION, AT 57.9 FLOWEST CLOUD REPORTED, OVC 600 FTTEMPERATURE AND DEW POINT 60.0 F, 58.3 FRELATIVE HUMIDITY 94 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 POINTTITLELitchfield, the airSTATION REPORT · ASOS 3LFTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-3LF-2DRAWN AS linework on paperSOURCES FB-WAT-020, FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the northwest (310 degrees) at 17 mph, gusting 29 mph: force 4, a moderate breeze on the Beaufort scale. The strongest gust today was 35 mph.

Plan of the wind at Litchfield, north up: blowing from 310 degrees, the northwest, at 17 miles an hour, gusting 29; beside it the Beaufort scale from calm to hurricane force, force 4, moderate breeze, marked.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT 3LFFIG. C THE WIND AT LITCHFIELDPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 310°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE43GENTLE BREEZE84MODERATE BREEZE13NOW, 17 MPH5FRESH BREEZE196STRONG BREEZE25GUST, 29 MPH7NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLELitchfield, the windSTATION REPORT · ASOS 3LFTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-3LF-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

The full report of Litchfield, 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 Hillsboro

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

Near Hillsboro

River and lake gauges