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St. Joseph, Illinois

Village in Champaign County, Illinois

Air quality

The air at St. Joseph

Index 21, good, led by fine particles. Read at 12 AM from its reporting area, Champaign (IL), 16 miles off.

21Good
  • Fine particles (PM2.5)21Good18.7 mi
  • Ozone11Good10 ppb12 mi

The days ahead

Good each day through Mon Oct 19, led by fine particles. Yesterday measured 43, good.

Smoke, the next 43 hours

No smoke near the ground through Sat 7 PM.

FriSat

Precipitation

What has fallen at St. Joseph

0.46 in in the last 24 hours, and none in the 2 days before, to Fri 12 AM. Measured by radar and rain gauges, as water.

Last 24 hours
0.46in
Last 3 days
0.46in

Visibility

How far you can see at St. Joseph, the next 43 hours

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

FriSat

On the radar over St. Joseph, IllinoisReflectivityStorm topsRain rateRain, last 24 hoursForecast temperatureForecast rain totalEvery picture

What is measuring near here

The 6 instruments nearest St. Joseph, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 0.6 miles away.

measured now4 instruments

RantoulTIP

At an airfield/13.6 mi away/738 ft/66 ft above here

temp, wind, gust, visibility, precip, pressure

Rank439of 1,393

measured daily2 instruments

OgdenOGDI2

At a cooperative observer's station/4.0 mi away/669 ft/3 ft below here

snowfall, snow depth, precip, high, low

Rank1,392of 1,393

Station report

The weather at Rantoul, drawn

The nearest airport reporting now, 13.6 mi from St. Joseph, Illinois. From its report of Oct 16, 2026, 12:35 AM local time: 3 of its 6 sheets.

The sky

Overcast at 1,800 ft; the ceiling is 1,800 ft; visibility 4 mi.

Section of the sky over Rantoul, height above the station to scale: overcast cloud with its base at 1,800 feet, the ceiling at 1,800 feet, and visibility of 4 mi.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT TIPFIG. A THE SKY OVER RANTOULSECTION, 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 1,800 FTOVERCAST, 8 EIGHTHS OF THE SKYCEILING 1,800 FTVISIBILITY, MILES: 4 MI0510TITLERantoul, the skySTATION REPORT · ASOS TIPTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-TIP-1DRAWN AS linework on paperSOURCES FB-SKY-001, FB-SKY-017, FB-SKY-016, FB-SKY-018

The air

57.4 F with a dew point of 57.2 F, 99 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 100 ft up; the lowest cloud reported is at 1,800 ft.

Chart of the air at Rantoul: temperature 57.4 degrees Fahrenheit and dew point 57.2, 99 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 100 feet above the station, against the lowest cloud reported at 1,800 feet; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT TIPFIG. B THE AIR AT RANTOULTHE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION01,0002,0003,00050 F60 F70 FSATURATES 100 FT ABOVE THE STATION, AT 57.1 FLOWEST CLOUD REPORTED, OVC 1,800 FTTEMPERATURE AND DEW POINT 57.4 F, 57.2 FRELATIVE HUMIDITY 99 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 POINTTITLERantoul, the airSTATION REPORT · ASOS TIPTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-TIP-2DRAWN AS linework on paperSOURCES FB-WAT-020, FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the northwest (310 degrees) at 15 mph, gusting 24 mph: force 4, a moderate breeze on the Beaufort scale. The strongest gust today was 29 mph.

Plan of the wind at Rantoul, north up: blowing from 310 degrees, the northwest, at 15 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 TIPFIG. C THE WIND AT RANTOULPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 310°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE43GENTLE BREEZE84MODERATE BREEZE13NOW, 15 MPH5FRESH BREEZE19GUST, 24 MPH6STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLERantoul, the windSTATION REPORT · ASOS TIPTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-TIP-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

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

0in

Snow on the ground

Measured at Ogden (OGDI2), 4.0 miles from here, read 15 Oct, 07:00. measured daily

Elsewhere in Illinois

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

Near St. Joseph

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

Near St. Joseph

River and lake gauges