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Rockbridge, Illinois

Village in Greene County, Illinois

Air quality

The air at Rockbridge

Index 12, good, led by ozone. Read at 5 AM from its reporting area, Springfield (IL), 47 miles off.

12Good
  • Fine particles (PM2.5)7Good14 mi
  • Ozone12Good12 ppb14 mi

The days ahead

Good each day through Mon Oct 19, led by fine particles. Yesterday measured 15, good.

Smoke, the next 45 hours

No smoke near the ground through Mon 1 AM.

SatSun

Precipitation

What has fallen at Rockbridge

0.14 in in the last 24 hours, 1.10 in over the last 3 days, to Sat 4 AM. Measured by radar and rain gauges, as water.

Last 24 hours
0.14in
Last 3 days
1.10in

Visibility

How far you can see at Rockbridge, the next 45 hours

Visibility stays 8 miles or more through Mon 1 AM, lowest 9 miles Sat 7 AM.

SatSun

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

What is measuring near here

The 6 instruments nearest Rockbridge, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 8.0 miles away.

measured now4 instruments

measured daily2 instruments

MedoraMEDI2

At a cooperative observer's station/8.0 mi away/604 ft/62 ft above here

snowfall, snow depth, precip, high, low

Rank1,112of 1,419

Medora 1.4 SIL-MP-1

In a volunteer observer's own ground/8.5 mi away/604 ft/62 ft above here

precip, snowfall, snow depth

Rank-

Station report

The weather at Alton/St Louis R, drawn

The nearest airport reporting now, 27.6 mi from Rockbridge, Illinois. From its report of Oct 17, 2026, 5:15 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 Alton/St Louis R, 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 ALNFIG. A THE SKY OVER ALTON/ST LOUIS RSECTION, 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 MORE0510TITLEAlton/St Louis R, the skySTATION REPORT · ASOS ALNTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-17IDSR-ALN-1DRAWN AS linework on paperSOURCES FB-SKY-001

The air

42.4 F with a dew point of 38.3 F, 85 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 900 ft up.

Chart of the air at Alton/St Louis R: temperature 42.4 degrees Fahrenheit and dew point 38.3, 85 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 900 feet above the station; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT ALNFIG. B THE AIR AT ALTON/ST LOUIS RTHE 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 FSATURATES 900 FT ABOVE THE STATION, AT 37.4 FTEMPERATURE 42.4 FDEW POINT 38.3 FSPREAD 4.1 FRELATIVE HUMIDITY 85 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 POINTTITLEAlton/St Louis R, the airSTATION REPORT · ASOS ALNTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-17IDSR-ALN-2DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the north northwest (330 degrees) at 3 mph: force 1, a light air on the Beaufort scale.

Plan of the wind at Alton/St Louis R, north up: blowing from 330 degrees, the north northwest, 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 ALNFIG. C THE WIND AT ALTON/ST LOUIS RPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 330°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR1NOW, 3 MPH2LIGHT BREEZE43GENTLE BREEZE84MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEAlton/St Louis R, the windSTATION REPORT · ASOS ALNTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-17IDSR-ALN-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

The full report of Alton/St Louis R, in 6 sheets, each beside the Field Book plates that explain it

0in

Snow on the ground

Measured at Medora (MEDI2), 8.0 miles from here, read 16 Oct, 07:00. measured daily

Elsewhere in Illinois

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

Near Rockbridge

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

Near Rockbridge

River and lake gauges