Storm Station
Illiopolis, Illinois
63°
Overcast· Feels like 63°·Light air 4 mph ENE
Mostly cloudy, with a low around 54. East wind around 3 mph.
-UV
-Air quality
78%Humidity
82%Cloud

What is measuring near here

The 3 instruments nearest Illiopolis, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 4.1 miles away.

measured now1 instrument

DecaturDEC

At an airfield/20.2 mi away/679 ft/74 ft above here

temp, wind, gust, visibility, precip, pressure

Rank1of 417

measured daily2 instruments

Illiopolis 4.2 NEIL-MA-5

In a volunteer observer's own ground/4.1 mi away/597 ft/8 ft below here

precip, snowfall, snow depth

Rank-

BuffaloBUFI2

At a cooperative observer's station/9.0 mi away/597 ft/8 ft below here

snowfall, snow depth, precip, high, low

Rank-

Station report

The weather at Decatur, drawn

The nearest airport reporting now, 20.2 mi from Illiopolis. From its report of Sep 27, 2026, 3:54 AM local time: 3 of its 6 sheets.

The sky

Scattered at 10,000 ft; visibility 10 mi or more.

Section of the sky over Decatur, height above the station to scale: scattered cloud with its base at 10,000 feet, and visibility of 10 mi or more.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT DECFIG. A THE SKY OVER DECATURSECTION, 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 STATION02,5005,0007,50010,00012,50015,000ETAGESLOWMIDDLETHE STATIONTHE CEILOMETER READS TO 12,000 FTSCT 10,000 FTSCATTERED, 3 TO 4 EIGHTHS OF THE SKYVISIBILITY, MILES: 10 MI OR MORE0510TITLEDecatur, the skySTATION REPORT · ASOS DECTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-09-27IDSR-DEC-1DRAWN AS linework on paperSOURCES FB-SKY-001, FB-SKY-013, FB-SKY-014

The air

50.0 F with a dew point of 48.0 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 10,000 ft.

Chart of the air at Decatur: temperature 50.0 degrees Fahrenheit and dew point 48.0, 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 10,000 feet; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT DECFIG. B THE AIR AT DECATURTHE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION01,0002,0003,0004,00040 F50 F60 FSATURATES 500 FT ABOVE THE STATION, AT 47.5 FABOVE THIS SHEET: LOWEST CLOUD REPORTED, SCT 10,000 FTTEMPERATURE AND DEW POINT 50.0 F, 48.0 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 POINTTITLEDecatur, the airSTATION REPORT · ASOS DECTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-09-27IDSR-DEC-2DRAWN AS linework on paperSOURCES FB-WAT-020, FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the northeast (50 degrees) at 6 mph: force 2, a light breeze on the Beaufort scale.

Plan of the wind at Decatur, north up: blowing from 50 degrees, the northeast, at 6 miles an hour; beside it the Beaufort scale from calm to hurricane force, force 2, light breeze, marked.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT DECFIG. C THE WIND AT DECATURPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 50°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE4NOW, 6 MPH3GENTLE BREEZE84MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEDecatur, the windSTATION REPORT · ASOS DECTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-09-27IDSR-DEC-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

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

0in

Snow on the ground

Measured at Buffalo (BUFI2), 9.0 miles from here, read 21 Sep, 07:00. measured daily

Elsewhere in Illinois

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

Near Illiopolis

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