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Elwin, Illinois

Community in Macon County, Illinois

Air quality

The air at Elwin

Index 32, good, led by fine particles. Read at 10 PM from its reporting area, Decatur (IL), 6 miles off.

32Good
  • Fine particles (PM2.5)32Good-
  • Ozone14Good-

The days ahead

Good each day through Mon Oct 19, led by fine particles. Yesterday measured 45, good.

Smoke, the next 46 hours

No smoke near the ground through Sat 7 PM.

FriSat

Precipitation

What has fallen at Elwin

0.44 in in the last 24 hours, and none in the 2 days before, to Thu 9 PM. Measured by radar and rain gauges, as water.

Last 24 hours
0.44in
Last 3 days
0.44in

Visibility

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

Visibility stays 6 miles or more through Sat 7 PM, lowest 7 miles Fri 4 PM.

FriSat

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

What is measuring near here

The 7 instruments nearest Elwin, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 0.8 miles away.

measured now5 instruments

DecaturDEC

At an airfield/7.2 mi away/679 ft/26 ft below here

temp, wind, gust, visibility, precip, pressure

Rank399of 1,393

measured daily2 instruments

Decatur 5.0 SWIL-MA-2

In a volunteer observer's own ground/0.8 mi away/702 ft/3 ft below here

precip, snowfall, snow depth

Rank-

Station report

The weather at Decatur, drawn

The nearest airport reporting now, 7.2 mi from Elwin, Illinois. From its report of Oct 15, 2026, 10:16 PM local time: 3 of its 6 sheets.

The sky

Broken at 700 ft, broken at 1,100 ft, overcast at 2,700 ft; the ceiling is 700 ft; visibility 3 mi.

Section of the sky over Decatur, height above the station to scale: broken cloud with its base at 700 feet, broken cloud with its base at 1,100 feet, overcast cloud with its base at 2,700 feet, the ceiling at 700 feet, and visibility of 3 mi.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 STATION01,0002,0003,0004,0005,000ETAGESLOWTHE STATIONTHE CEILOMETER READS TO 12,000 FT, ABOVE THIS SHEETOVC 2,700 FTOVERCAST, 8 EIGHTHS OF THE SKYBKN 1,100 FTBROKEN, 5 TO 7 EIGHTHS OF THE SKYBKN 700 FTBROKEN, 5 TO 7 EIGHTHS OF THE SKYCEILING 700 FTVISIBILITY, MILES: 3 MI0510TITLEDecatur, the skySTATION REPORT · ASOS DECTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-DEC-1DRAWN AS linework on paperSOURCES FB-SKY-001, FB-SKY-017, FB-SKY-016, FB-SKY-018

The air

68.0 F with a dew point of 67.0 F, 97 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 200 ft up; the lowest cloud reported is at 700 ft.

Chart of the air at Decatur: temperature 68.0 degrees Fahrenheit and dew point 67.0, 97 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 200 feet above the station, against the lowest cloud reported at 700 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 STATION01,0002,0003,00060 F70 F80 FSATURATES 200 FT ABOVE THE STATION, AT 66.7 FLOWEST CLOUD REPORTED, BKN 700 FTTEMPERATURE AND DEW POINT 68.0 F, 67.0 FRELATIVE HUMIDITY 97 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 6DATE2026-10-16IDSR-DEC-2DRAWN AS linework on paperSOURCES FB-WAT-020, FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the west (280 degrees) at 13 mph, gusting 24 mph: force 4, a moderate breeze on the Beaufort scale. The strongest gust today was 24 mph.

Plan of the wind at Decatur, north up: blowing from 280 degrees, the west, at 13 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 DECFIG. C THE WIND AT DECATURPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 280°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE43GENTLE BREEZE84MODERATE BREEZE13NOW, 13 MPH5FRESH BREEZE19GUST, 24 MPH6STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEDecatur, the windSTATION REPORT · ASOS DECTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-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), 3.5 miles from here, read 14 Oct, 23:59. measured daily

Elsewhere in Illinois

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

Near Elwin

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

Near Elwin

River and lake gauges