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Mattoon, Illinois

City in Coles County, Illinois

Air quality

The air at Mattoon

Index 10, good, led by ozone. Read at 2 AM from its reporting area, Decatur (IL), 41 miles off.

10Good
  • Fine particles (PM2.5)9Good-
  • Ozone10Good-

The days ahead

Good each day through Mon Oct 19, led by fine particles. Yesterday measured 36, good.

Smoke, the next 41 hours

No smoke near the ground through Sat 7 PM.

FriSat

Precipitation

What has fallen at Mattoon

0.48 in in the last 24 hours, 0.51 in over the last 3 days, to Fri 1 AM. Measured by radar and rain gauges, as water.

Last 24 hours
0.48in
Last 3 days
0.51in

Visibility

How far you can see at Mattoon, the next 41 hours

Visibility stays 9 miles or more through Sat 7 PM, lowest 9 miles Fri 3 AM.

FriSat

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

What is measuring near here

The 7 instruments nearest Mattoon, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 0.2 miles away.

measured now5 instruments

measured daily2 instruments

MattoonMOOI2

At a cooperative observer's station/1.2 mi away/696 ft/33 ft below here

snowfall, snow depth, precip, high, low

Rank157of 1,393

Mattoon 2.1 WIL-CE-17

In a volunteer observer's own ground/1.8 mi away/718 ft/11 ft below here

precip, snowfall, snow depth

Rank-

Station report

The weather at Mattoon/Charlest, drawn

The nearest airport reporting now, 5.1 mi from Mattoon, Illinois. From its report of Oct 16, 2026, 2:31 AM local time: 3 of its 6 sheets.

The sky

Broken at 1,300 ft, overcast at 1,700 ft; the ceiling is 1,300 ft; visibility 9 mi.

Section of the sky over Mattoon/Charlest, height above the station to scale: broken cloud with its base at 1,300 feet, overcast cloud with its base at 1,700 feet, the ceiling at 1,300 feet, and visibility of 9 mi.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT MTOFIG. A THE SKY OVER MATTOON/CHARLESTSECTION, 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 1,700 FTOVERCAST, 8 EIGHTHS OF THE SKYBKN 1,300 FTBROKEN, 5 TO 7 EIGHTHS OF THE SKYCEILING 1,300 FTVISIBILITY, MILES: 9 MI0510TITLEMattoon/Charlest, the skySTATION REPORT · ASOS MTOTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-MTO-1DRAWN AS linework on paperSOURCES FB-SKY-001, FB-SKY-017, FB-SKY-016, FB-SKY-018

The air

54.0 F with a dew point of 52.0 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 1,300 ft.

Chart of the air at Mattoon/Charlest: temperature 54.0 degrees Fahrenheit and dew point 52.0, 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 1,300 feet; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT MTOFIG. B THE AIR AT MATTOON/CHARLESTTHE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION01,0002,0003,00040 F50 F60 FSATURATES 500 FT ABOVE THE STATION, AT 51.5 FLOWEST CLOUD REPORTED, BKN 1,300 FTTEMPERATURE AND DEW POINT 54.0 F, 52.0 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 POINTTITLEMattoon/Charlest, the airSTATION REPORT · ASOS MTOTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-MTO-2DRAWN AS linework on paperSOURCES FB-WAT-020, FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the west northwest (300 degrees) at 18 mph, gusting 36 mph: force 4, a moderate breeze on the Beaufort scale. The strongest gust today was 40 mph.

Plan of the wind at Mattoon/Charlest, north up: blowing from 300 degrees, the west northwest, at 18 miles an hour, gusting 36; beside it the Beaufort scale from calm to hurricane force, force 4, moderate breeze, marked.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT MTOFIG. C THE WIND AT MATTOON/CHARLESTPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 300°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE43GENTLE BREEZE84MODERATE BREEZE13NOW, 18 MPH5FRESH BREEZE196STRONG BREEZE257NEAR GALE32GUST, 36 MPH8GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEMattoon/Charlest, the windSTATION REPORT · ASOS MTOTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-MTO-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

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

0in

Snow on the ground

Measured at Mattoon (MOOI2), 1.2 miles from here, read 15 Oct, 08:00. measured daily

Elsewhere in Illinois

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

Near Mattoon

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

Near Mattoon

River and lake gauges