Storm Station
Sign in

Mason, Illinois

Town in Effingham County, Illinois

Air quality

The air at Mason

Index 22, good, led by ozone. Read at 9 AM from its reporting area, Vincennes (IN), 62 miles off.

22Good
  • Ozone22Good-

The days ahead

Yesterday measured 19, good.

Smoke, the next 46 hours

No smoke near the ground through Mon 7 AM.

SatSunMon

Precipitation

What has fallen at Mason

None in the last 24 hours; 0.51 in over the last 3 days, to Sat 9 AM. Measured by radar and rain gauges, as water.

Last 24 hours
0.00in
Last 3 days
0.51in

Visibility

How far you can see at Mason, the next 46 hours

Visibility stays 10 miles or more through Mon 7 AM.

SatSunMon

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

What is measuring near here

The 6 instruments nearest Mason, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 5.5 miles away.

measured now4 instruments

Effingham1H2

At an airfield/9.5 mi away/587 ft/3 ft below here

temp, wind, gust, visibility, precip, pressure

Rank664of 1,419

FloraFOAI2

At a river or reservoir gauge/21.6 mi away/490 ft/100 ft below here

temp, wind, gust, humidity, pressure

Rank892of 1,419

measured daily2 instruments

Dieterich 10.1 SWIL-EF-34

In a volunteer observer's own ground/5.8 mi away/547 ft/43 ft below here

precip, snowfall, snow depth

Rank-

EffinghamEFMI2

At a cooperative observer's station/11.7 mi away/554 ft/36 ft below here

snowfall, snow depth, precip, high, low

Rank1,131of 1,419

Station report

The weather at Effingham, drawn

The nearest airport reporting now, 9.5 mi from Mason, Illinois. From its report of Oct 17, 2026, 9:55 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 Effingham, 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 1H2FIG. A THE SKY OVER EFFINGHAMSECTION, 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 MORE0510TITLEEffingham, the skySTATION REPORT · ASOS 1H2TYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-17IDSR-1H2-1DRAWN AS linework on paperSOURCES FB-SKY-001

The air

48.4 F with a dew point of 33.8 F, 57 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 3,300 ft up.

Chart of the air at Effingham: temperature 48.4 degrees Fahrenheit and dew point 33.8, 57 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 3,300 feet above the station; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT 1H2FIG. B THE AIR AT EFFINGHAMTHE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION01,0002,0003,0004,0005,00020 F30 F40 F50 F60 FSATURATES 3,300 FT ABOVE THE STATION, AT 30.7 FTEMPERATURE 48.4 FDEW POINT 33.8 FSPREAD 14.6 FRELATIVE HUMIDITY 57 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 POINTTITLEEffingham, the airSTATION REPORT · ASOS 1H2TYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-17IDSR-1H2-2DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the north (10 degrees) at 8 mph: force 3, a gentle breeze on the Beaufort scale. The strongest gust today was 20 mph.

Plan of the wind at Effingham, north up: blowing from 10 degrees, the north, at 8 miles an hour; beside it the Beaufort scale from calm to hurricane force, force 3, gentle breeze, marked.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT 1H2FIG. C THE WIND AT EFFINGHAMPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 10°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE43GENTLE BREEZE8NOW, 8 MPH4MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEEffingham, the windSTATION REPORT · ASOS 1H2TYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-17IDSR-1H2-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

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

0in

Snow on the ground

Measured at Effingham (EFMI2), 11.7 miles from here, read 17 Oct, 07:00. measured daily

Elsewhere in Illinois

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

Near Mason

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

Near Mason

River and lake gauges