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Otterville, Illinois

Town in Jersey County, Illinois

Air quality

The air at Otterville

Index 14, good, led by ozone. Read at 12 AM from its reporting area, Saint Louis (MO), 33 miles off.

14Good
  • Fine particles (PM2.5)13Good4.6 mi
  • Ozone14Good16 ppb4.6 mi
  • Coarse particles (PM10)7Good-
  • Nitrogen dioxide5Good5.3 ppb15.4 mi
  • Sulfur dioxide0Good0.2 ppb20.7 mi

The days ahead

Yesterday measured 44, good.

Smoke, the next 43 hours

No smoke near the ground through Sat 7 PM.

FriSat

Precipitation

What has fallen at Otterville

1.55 in in the last 24 hours, 1.85 in over the last 3 days, to Fri 12 AM. Measured by radar and rain gauges, as water.

Last 24 hours
1.55in
Last 3 days
1.85in

Visibility

How far you can see at Otterville, the next 43 hours

Visibility stays 9 miles or more through Sat 7 PM, lowest 9 miles Fri 2 PM.

FriSat

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

What is measuring near here

The 6 instruments nearest Otterville, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 3.0 miles away.

measured now4 instruments

measured daily2 instruments

JerseyvilleJVLI2

At a cooperative observer's station/4.3 mi away/610 ft/14 ft below here

snowfall, snow depth, precip, high, low

Rank1,215of 1,393

Station report

The weather at Alton/St Louis R, drawn

The nearest airport reporting now, 21.9 mi from Otterville, Illinois. From its report of Oct 16, 2026, 12:35 AM local time: 3 of its 6 sheets.

The sky

Scattered at 1,700 ft, broken at 4,100 ft, overcast at 6,500 ft; the ceiling is 4,100 ft; visibility 7 mi.

Section of the sky over Alton/St Louis R, height above the station to scale: scattered cloud with its base at 1,700 feet, broken cloud with its base at 4,100 feet, overcast cloud with its base at 6,500 feet, the ceiling at 4,100 feet, and visibility of 7 mi.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 STATION02,5005,0007,50010,000ETAGESLOWMIDDLETHE STATIONTHE CEILOMETER READS TO 12,000 FT, ABOVE THIS SHEETOVC 6,500 FTOVERCAST, 8 EIGHTHS OF THE SKYBKN 4,100 FTBROKEN, 5 TO 7 EIGHTHS OF THE SKYSCT 1,700 FTSCATTERED, 3 TO 4 EIGHTHS OF THE SKYCEILING 4,100 FTVISIBILITY, MILES: 7 MI0510TITLEAlton/St Louis R, the skySTATION REPORT · ASOS ALNTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-ALN-1DRAWN AS linework on paperSOURCES FB-SKY-001, FB-SKY-017, FB-SKY-016, FB-SKY-018, FB-SKY-013, FB-SKY-014

The air

57.4 F with a dew point of 53.0 F, 85 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 1,000 ft up; the lowest cloud reported is at 1,700 ft.

Chart of the air at Alton/St Louis R: temperature 57.4 degrees Fahrenheit and dew point 53.0, 85 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 1,000 feet above the station, against the lowest cloud reported at 1,700 feet; 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 STATION01,0002,0003,00040 F50 F60 F70 FSATURATES 1,000 FT ABOVE THE STATION, AT 51.9 FLOWEST CLOUD REPORTED, SCT 1,700 FTTEMPERATURE 57.4 FDEW POINT 53.0 FSPREAD 4.4 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 6DATE2026-10-16IDSR-ALN-2DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the northwest (310 degrees) at 17 mph, gusting 26 mph: force 4, a moderate breeze on the Beaufort scale. The strongest gust today was 26 mph.

Plan of the wind at Alton/St Louis R, north up: blowing from 310 degrees, the northwest, at 17 miles an hour, gusting 26; beside it the Beaufort scale from calm to hurricane force, force 4, moderate breeze, 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 310°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE43GENTLE BREEZE84MODERATE BREEZE13NOW, 17 MPH5FRESH BREEZE196STRONG BREEZE25GUST, 26 MPH7NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEAlton/St Louis R, the windSTATION REPORT · ASOS ALNTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-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 Jerseyville (JVLI2), 4.3 miles from here, read 13 Oct, 07:00. measured daily

Elsewhere in Illinois

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

Near Otterville

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

Near Otterville

River and lake gauges