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Maeystown, Illinois

Village in Monroe County, Illinois

Air quality

The air at Maeystown

Index 23, good, led by ozone. Read at 10 PM from its reporting area, Bonne Terre (MO), 25 miles off.

23Good
  • Fine particles (PM2.5)-17.6 mi
  • Ozone23Good16 ppb17.6 mi
  • Coarse particles (PM10)-17.6 mi
  • Nitrogen dioxide2Good2 ppb17.6 mi
  • Sulfur dioxide0Good0.4 ppb8.4 mi

The days ahead

Yesterday measured 21, good.

Smoke, the next 45 hours

No smoke near the ground through Sat 7 PM.

FriSat

Precipitation

What has fallen at Maeystown

0.85 in in the last 24 hours, 1.75 in over the last 3 days, to Thu 10 PM. Measured by radar and rain gauges, as water.

Last 24 hours
0.85in
Last 3 days
1.75in

Visibility

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

Visibility stays 6 miles or more through Sat 7 PM, lowest 6 miles Fri 6 PM.

FriSat

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

What is measuring near here

The 6 instruments nearest Maeystown, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 5.2 miles away.

measured now4 instruments

measured daily2 instruments

WaterlooWTRI2

At a cooperative observer's station/8.7 mi away/702 ft/215 ft above here

snowfall, snow depth, precip, high, low

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Station report

The weather at Cahokia/St Louis, drawn

The nearest airport reporting now, 24.2 mi from Maeystown, Illinois. From its report of Oct 15, 2026, 10:53 PM local time: 3 of its 6 sheets.

The sky

Broken at 1,500 ft, overcast at 2,800 ft; the ceiling is 1,500 ft; visibility 10 mi or more.

Section of the sky over Cahokia/St Louis, height above the station to scale: broken cloud with its base at 1,500 feet, overcast cloud with its base at 2,800 feet, the ceiling at 1,500 feet, and visibility of 10 mi or more.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT CPSFIG. A THE SKY OVER CAHOKIA/ST LOUISSECTION, 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 STATION01,0002,0003,0004,0005,000ETAGESLOWTHE STATIONTHE CEILOMETER READS TO 12,000 FT, ABOVE THIS SHEETOVC 2,800 FTOVERCAST, 8 EIGHTHS OF THE SKYBKN 1,500 FTBROKEN, 5 TO 7 EIGHTHS OF THE SKYCEILING 1,500 FTVISIBILITY, MILES: 10 MI OR MORE0510TITLECahokia/St Louis, the skySTATION REPORT · ASOS CPSTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-CPS-1DRAWN AS linework on paperSOURCES FB-SKY-001, FB-SKY-017, FB-SKY-016, FB-SKY-018

The air

68.0 F with a dew point of 63.0 F, 84 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 1,200 ft up; the lowest cloud reported is at 1,500 ft.

Chart of the air at Cahokia/St Louis: temperature 68.0 degrees Fahrenheit and dew point 63.0, 84 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 1,200 feet above the station, against the lowest cloud reported at 1,500 feet; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT CPSFIG. B THE AIR AT CAHOKIA/ST LOUISTHE 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 F80 FSATURATES 1,200 FT ABOVE THE STATION, AT 61.8 FLOWEST CLOUD REPORTED, BKN 1,500 FTTEMPERATURE 68.0 FDEW POINT 63.0 FSPREAD 5.0 FRELATIVE HUMIDITY 84 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 POINTTITLECahokia/St Louis, the airSTATION REPORT · ASOS CPSTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-CPS-2DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the northwest (310 degrees) at 22 mph, gusting 32 mph: force 5, a fresh breeze on the Beaufort scale. The strongest gust today was 37 mph.

Plan of the wind at Cahokia/St Louis, north up: blowing from 310 degrees, the northwest, at 22 miles an hour, gusting 32; beside it the Beaufort scale from calm to hurricane force, force 5, fresh breeze, marked.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT CPSFIG. C THE WIND AT CAHOKIA/ST LOUISPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 310°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE43GENTLE BREEZE84MODERATE BREEZE135FRESH BREEZE19NOW, 22 MPH6STRONG BREEZE257NEAR GALE32GUST, 32 MPH8GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLECahokia/St Louis, the windSTATION REPORT · ASOS CPSTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-CPS-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

The full report of Cahokia/St Louis, 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 Maeystown

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

Near Maeystown

River and lake gauges