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South Jacksonville, Illinois

Village in Morgan County, Illinois

Air quality

The air at South Jacksonville

Index 21, good, led by fine particles. Read at 11 AM from its reporting area, Springfield (IL), 29 miles off.

21Good
  • Fine particles (PM2.5)21Good-
  • Ozone17Good-

The days ahead

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

Smoke, the next 45 hours

No smoke near the ground through Sun 7 AM.

FriSatSun

Precipitation

What has fallen at South Jacksonville

0.31 in in the last 24 hours, 0.46 in over the last 3 days, to Fri 10 AM. Measured by radar and rain gauges, as water.

Last 24 hours
0.31in
Last 3 days
0.46in

Visibility

How far you can see at South Jacksonville, the next 45 hours

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

FriSatSun

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

What is measuring near here

The 6 instruments nearest South Jacksonville, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 0.3 miles away.

measured now4 instruments

measured daily2 instruments

Jacksonville 2JCKI2

At a cooperative observer's station/0.3 mi away/630 ft/3 ft below here

snowfall, snow depth, precip, high, low

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Station report

The weather at Jacksonville, drawn

The nearest airport reporting now, 4.4 mi from South Jacksonville, Illinois. From its report of Oct 16, 2026, 11:15 AM local time: 3 of its 6 sheets.

The sky

Scattered at 3,400 ft, broken at 4,000 ft, overcast at 4,700 ft; the ceiling is 4,000 ft; visibility 10 mi or more.

Section of the sky over Jacksonville, height above the station to scale: scattered cloud with its base at 3,400 feet, broken cloud with its base at 4,000 feet, overcast cloud with its base at 4,700 feet, the ceiling at 4,000 feet, and visibility of 10 mi or more.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT IJXFIG. A THE SKY OVER JACKSONVILLESECTION, 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 STATION01,0002,0003,0004,0005,0006,0007,0008,000ETAGESLOWMIDDLETHE STATIONTHE CEILOMETER READS TO 12,000 FT, ABOVE THIS SHEETOVC 4,700 FTOVERCAST, 8 EIGHTHS OF THE SKYBKN 4,000 FTBROKEN, 5 TO 7 EIGHTHS OF THE SKYSCT 3,400 FTSCATTERED, 3 TO 4 EIGHTHS OF THE SKYCEILING 4,000 FTVISIBILITY, MILES: 10 MI OR MORE0510TITLEJacksonville, the skySTATION REPORT · ASOS IJXTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-IJX-1DRAWN AS linework on paperSOURCES FB-SKY-001, FB-SKY-017, FB-SKY-016, FB-SKY-018

The air

51.4 F with a dew point of 41.4 F, 69 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 2,300 ft up; the lowest cloud reported is at 3,400 ft.

Chart of the air at Jacksonville: temperature 51.4 degrees Fahrenheit and dew point 41.4, 69 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 2,300 feet above the station, against the lowest cloud reported at 3,400 feet; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT IJXFIG. B THE AIR AT JACKSONVILLETHE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION01,0002,0003,0004,0005,00030 F40 F50 F60 FSATURATES 2,300 FT ABOVE THE STATION, AT 39.2 FLOWEST CLOUD REPORTED, SCT 3,400 FTTEMPERATURE 51.4 FDEW POINT 41.4 FSPREAD 10.0 FRELATIVE HUMIDITY 69 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 POINTTITLEJacksonville, the airSTATION REPORT · ASOS IJXTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-IJX-2DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the west northwest (300 degrees) at 12 mph, gusting 22 mph: force 3, a gentle breeze on the Beaufort scale. The strongest gust today was 28 mph.

Plan of the wind at Jacksonville, north up: blowing from 300 degrees, the west northwest, at 12 miles an hour, gusting 22; beside it the Beaufort scale from calm to hurricane force, force 3, gentle breeze, marked.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT IJXFIG. C THE WIND AT JACKSONVILLEPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 300°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE43GENTLE BREEZE8NOW, 12 MPH4MODERATE BREEZE135FRESH BREEZE19GUST, 22 MPH6STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEJacksonville, the windSTATION REPORT · ASOS IJXTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-IJX-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

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

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Snow on the ground

Elsewhere in Illinois

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

Near South Jacksonville

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

Near South Jacksonville

River and lake gauges