Storm Station
Harristown, Illinois
58°
Partly cloudy· Feels like 58°·Light air 4 mph E
Partly sunny, with a high near 76. East northeast wind around 6 mph.
-UV
-Air quality
81%Humidity
43%Cloud

What is measuring near here

The 4 instruments nearest Harristown, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 1.6 miles away.

measured now2 instruments

DecaturDEC

At an airfield/10.8 mi away/679 ft/6 ft below here

temp, wind, gust, visibility, precip, pressure

Rank1of 417

Champaign 9 SW54808

At a climate reference station/39.6 mi away/700 ft/15 ft above here

temp, humidity, wind, solar, precip

Rank-

measured daily2 instruments

Decatur 6.5 WSWIL-MA-40

In a volunteer observer's own ground/1.6 mi away/643 ft/42 ft below here

precip, snowfall, snow depth

Rank-

Station report

The weather at Decatur, drawn

The nearest airport reporting now, 10.8 mi from Harristown. From its report of Sep 27, 2026, 6:54 AM local time: 3 of its 6 sheets.

The sky

No cloud below 12,000 ft; visibility 10 mi or more.

Section of the sky over Decatur, height above the station to scale: no cloud detected below 12,000 feet, the reach of its ceilometer, 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 STATION05001,0001,5002,0002,5003,000ETAGESLOWTHE STATIONTHE CEILOMETER READS TO 12,000 FT, ABOVE THIS SHEETNO CLOUD DETECTED BELOW 12,000 FTVISIBILITY, 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

The air

48.0 F with a dew point of 46.0 F, 93 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 500 ft up.

Chart of the air at Decatur: temperature 48.0 degrees Fahrenheit and dew point 46.0, 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; 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 STATION01,0002,0003,00030 F40 F50 F60 FSATURATES 500 FT ABOVE THE STATION, AT 45.5 FTEMPERATURE AND DEW POINT 48.0 F, 46.0 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 east (80 degrees) at 3 mph: force 1, a light air on the Beaufort scale.

Plan of the wind at Decatur, north up: blowing from 80 degrees, the east, at 3 miles an hour; beside it the Beaufort scale from calm to hurricane force, force 1, light air, 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 80°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR1NOW, 3 MPH2LIGHT BREEZE43GENTLE 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 Sangamon River AT Decatur WTP (DECI2), 6.2 miles from here, read 25 Sep, 23:59. measured daily

Elsewhere in Illinois

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

Near Harristown

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