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Mount Sterling, Illinois

City in Brown County, Illinois

Air quality

The air at Mount Sterling

Index 14, good, led by ozone. Read at 7 PM from its reporting area, Springfield (IL), 58 miles off.

14Good
  • Fine particles (PM2.5)8Good-
  • Ozone14Good-

The days ahead

Good each day through Mon Oct 19, led by fine particles. Yesterday measured 29, good.

Smoke, the next 42 hours

No smoke near the ground through Sun 1 PM.

FriSatSun

Precipitation

What has fallen at Mount Sterling

0.01 in in the last 24 hours, 0.63 in over the last 3 days, to Fri 7 PM. Measured by radar and rain gauges, as water.

Last 24 hours
0.01in
Last 3 days
0.63in

Visibility

How far you can see at Mount Sterling, the next 42 hours

Visibility stays 8 miles or more through Sun 1 PM, lowest 8 miles Sat 7 AM.

FriSatSun

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

What is measuring near here

The 6 instruments nearest Mount Sterling, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 2.0 miles away.

measured now4 instruments

Perry [CCOOP]PEYI2

At a river or reservoir gauge/13.3 mi away/633 ft/101 ft below here

temp, wind, gust, humidity, pressure

Rank-

measured daily2 instruments

Meredosia 0.4 SIL-MG-16

In a volunteer observer's own ground/15.6 mi away/449 ft/285 ft below here

precip, snowfall, snow depth

Rank-

AugustaAUGI2

At a cooperative observer's station/19.2 mi away/666 ft/68 ft below here

snowfall, snow depth, precip, high, low

Rank-

Station report

The weather at Mount Sterling, drawn

The nearest airport reporting now, 2.0 mi from Mount Sterling, Illinois. From its report of Oct 16, 2026, 7:55 PM local time: 3 of its 6 sheets.

The sky

Overcast at 6,000 ft; the ceiling is 6,000 ft; visibility 10 mi or more.

Section of the sky over Mount Sterling, height above the station to scale: overcast cloud with its base at 6,000 feet, the ceiling at 6,000 feet, and visibility of 10 mi or more.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT I63FIG. A THE SKY OVER MOUNT STERLINGSECTION, 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 STATION02,5005,0007,50010,000ETAGESLOWMIDDLETHE STATIONTHE CEILOMETER READS TO 12,000 FT, ABOVE THIS SHEETOVC 6,000 FTOVERCAST, 8 EIGHTHS OF THE SKYCEILING 6,000 FTVISIBILITY, MILES: 10 MI OR MORE0510TITLEMount Sterling, the skySTATION REPORT · ASOS I63TYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-17IDSR-I63-1DRAWN AS linework on paperSOURCES FB-SKY-001, FB-SKY-017, FB-SKY-016, FB-SKY-018

The air

50.0 F with a dew point of 42.4 F, 75 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 1,700 ft up; the lowest cloud reported is at 6,000 ft.

Chart of the air at Mount Sterling: temperature 50.0 degrees Fahrenheit and dew point 42.4, 75 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 1,700 feet above the station, against the lowest cloud reported at 6,000 feet; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT I63FIG. B THE AIR AT MOUNT STERLINGTHE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION01,0002,0003,0004,0005,0006,0007,00030 F40 F50 F60 FSATURATES 1,700 FT ABOVE THE STATION, AT 40.7 FLOWEST CLOUD REPORTED, OVC 6,000 FTTEMPERATURE 50.0 FDEW POINT 42.4 FSPREAD 7.6 FRELATIVE HUMIDITY 75 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 POINTTITLEMount Sterling, the airSTATION REPORT · ASOS I63TYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-17IDSR-I63-2DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the north northwest (330 degrees) at 14 mph: force 4, a moderate breeze on the Beaufort scale. The strongest gust today was 30 mph.

Plan of the wind at Mount Sterling, north up: blowing from 330 degrees, the north northwest, at 14 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 I63FIG. C THE WIND AT MOUNT STERLINGPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 330°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE43GENTLE BREEZE84MODERATE BREEZE13NOW, 14 MPH5FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEMount Sterling, the windSTATION REPORT · ASOS I63TYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-17IDSR-I63-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

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

0in

Snow on the ground

Measured at Augusta (AUGI2), 19.2 miles from here, read 14 Oct, 05:50. measured daily

Elsewhere in Illinois

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

Near Mount Sterling

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

Near Mount Sterling

River and lake gauges