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Monticello, Illinois

City in Piatt County, Illinois

Air quality

The air at Monticello

Index 15, good, led by ozone. Read at 4 AM from its reporting area, Champaign (IL), 20 miles off.

15Good
  • Fine particles (PM2.5)11Good-
  • Ozone15Good-

The days ahead

Good each day through Mon Oct 19, led by fine particles. Yesterday measured 42, good.

Smoke, the next 46 hours

No smoke near the ground through Sun 1 AM.

FriSat

Precipitation

What has fallen at Monticello

0.46 in in the last 24 hours, and none in the 2 days before, to Fri 3 AM. Measured by radar and rain gauges, as water.

Last 24 hours
0.46in
Last 3 days
0.46in

Visibility

How far you can see at Monticello, the next 46 hours

Visibility stays 9 miles or more through Sun 1 AM, lowest 10 miles Fri 4 AM.

FriSat

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

What is measuring near here

The 7 instruments nearest Monticello, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 0.3 miles away.

measured now5 instruments

measured daily2 instruments

Monticello 0.5 NEIL-PT-22

In a volunteer observer's own ground/0.3 mi away/683 ft/22 ft above here

precip, snowfall, snow depth

Rank-

CiscoCISI2

At a cooperative observer's station/8.4 mi away/699 ft/38 ft above here

snowfall, snow depth, precip, high, low

Rank351of 1,393

Station report

The weather at Champaign - Willard, drawn

The nearest airport reporting now, 15.6 mi from Monticello, Illinois. From its report of Oct 16, 2026, 3:53 AM local time: 3 of its 6 sheets.

The sky

Overcast at 2,300 ft; the ceiling is 2,300 ft; visibility 10 mi or more.

Section of the sky over Champaign - Willard, height above the station to scale: overcast cloud with its base at 2,300 feet, the ceiling at 2,300 feet, and visibility of 10 mi or more.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT CMIFIG. A THE SKY OVER CHAMPAIGN - WILLARDSECTION, 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 STATION05001,0001,5002,0002,5003,0003,500ETAGESLOWTHE STATIONTHE CEILOMETER READS TO 12,000 FT, ABOVE THIS SHEETOVC 2,300 FTOVERCAST, 8 EIGHTHS OF THE SKYCEILING 2,300 FTVISIBILITY, MILES: 10 MI OR MORE0510TITLEChampaign - Willard, the skySTATION REPORT · ASOS CMITYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-CMI-1DRAWN AS linework on paperSOURCES FB-SKY-001, FB-SKY-017, FB-SKY-016, FB-SKY-018

The air

52.0 F with a dew point of 47.0 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 2,300 ft.

Chart of the air at Champaign - Willard: temperature 52.0 degrees Fahrenheit and dew point 47.0, 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 2,300 feet; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT CMIFIG. B THE AIR AT CHAMPAIGN - WILLARDTHE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION01,0002,0003,00030 F40 F50 F60 FSATURATES 1,200 FT ABOVE THE STATION, AT 45.9 FLOWEST CLOUD REPORTED, OVC 2,300 FTTEMPERATURE 52.0 FDEW POINT 47.0 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 POINTTITLEChampaign - Willard, the airSTATION REPORT · ASOS CMITYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-CMI-2DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the west northwest (300 degrees) at 17 mph: force 4, a moderate breeze on the Beaufort scale. The strongest gust today was 37 mph.

Plan of the wind at Champaign - Willard, north up: blowing from 300 degrees, the west northwest, at 17 miles an hour; beside it the Beaufort scale from calm to hurricane force, force 4, moderate breeze, marked.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT CMIFIG. C THE WIND AT CHAMPAIGN - WILLARDPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 300°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE43GENTLE BREEZE84MODERATE BREEZE13NOW, 17 MPH5FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEChampaign - Willard, the windSTATION REPORT · ASOS CMITYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-CMI-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

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

0in

Snow on the ground

Measured at Cisco (CISI2), 8.4 miles from here, read 15 Oct, 06:00. measured daily

Elsewhere in Illinois

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

Near Monticello

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

Near Monticello

River and lake gauges