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Vandalia, Missouri

City in Audrain County, Missouri

Air quality

The air at Vandalia

Index 16, good, led by ozone. Read at 11 PM from its reporting area, Mark Twain State Park (MO), 20 miles off.

16Good
  • Ozone16Good21 ppb20.1 mi
  • Coarse particles (PM10)4Good20.1 mi
  • Nitrogen dioxide1Good1 ppb20.1 mi
  • Sulfur dioxide1Good1.6 ppb20.1 mi

The days ahead

Yesterday measured 29, good.

Smoke, the next 44 hours

No smoke near the ground through Sat 7 PM.

FriSat

Precipitation

What has fallen at Vandalia

0.59 in in the last 24 hours, 1.55 in over the last 3 days, to Thu 11 PM. Measured by radar and rain gauges, as water.

Last 24 hours
0.59in
Last 3 days
1.55in

Visibility

How far you can see at Vandalia, the next 44 hours

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

FriSat

On the radar over Vandalia, MissouriReflectivityStorm topsRain rateRain, last 24 hoursForecast temperatureForecast rain totalEvery picture

What is measuring near here

The 6 instruments nearest Vandalia, 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

MexicoMYJ

At an airfield/20.8 mi away/814 ft/56 ft above here

temp, wind, gust, visibility, precip, pressure

Rank721of 1,014

measured daily2 instruments

VandaliaVNDM7

At a cooperative observer's station/0.3 mi away/748 ft/10 ft below here

snowfall, snow depth, precip, high, low

Rank593of 1,014

Station report

The weather at Mexico, drawn

The nearest airport reporting now, 20.8 mi from Vandalia, Missouri. From its report of Oct 15, 2026, 11:55 PM local time: 3 of its 6 sheets.

The sky

Broken at 2,700 ft, overcast at 3,300 ft; the ceiling is 2,700 ft; visibility 10 mi or more.

Section of the sky over Mexico, height above the station to scale: broken cloud with its base at 2,700 feet, overcast cloud with its base at 3,300 feet, the ceiling at 2,700 feet, and visibility of 10 mi or more.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT MYJFIG. A THE SKY OVER MEXICOSECTION, 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 3,300 FTOVERCAST, 8 EIGHTHS OF THE SKYBKN 2,700 FTBROKEN, 5 TO 7 EIGHTHS OF THE SKYCEILING 2,700 FTVISIBILITY, MILES: 10 MI OR MORE0510TITLEMexico, the skySTATION REPORT · ASOS MYJTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-MYJ-1DRAWN AS linework on paperSOURCES FB-SKY-001, FB-SKY-017, FB-SKY-016, FB-SKY-018

The air

51.8 F with a dew point of 48.2 F, 87 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 800 ft up; the lowest cloud reported is at 2,700 ft.

Chart of the air at Mexico: temperature 51.8 degrees Fahrenheit and dew point 48.2, 87 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 800 feet above the station, against the lowest cloud reported at 2,700 feet; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT MYJFIG. B THE AIR AT MEXICOTHE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION01,0002,0003,0004,00040 F50 F60 FSATURATES 800 FT ABOVE THE STATION, AT 47.3 FLOWEST CLOUD REPORTED, BKN 2,700 FTTEMPERATURE 51.8 FDEW POINT 48.2 FSPREAD 3.6 FRELATIVE HUMIDITY 87 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 POINTTITLEMexico, the airSTATION REPORT · ASOS MYJTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-MYJ-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 17 mph, gusting 22 mph: force 4, a moderate breeze on the Beaufort scale. The strongest gust today was 32 mph.

Plan of the wind at Mexico, north up: blowing from 310 degrees, the northwest, at 17 miles an hour, gusting 22; beside it the Beaufort scale from calm to hurricane force, force 4, moderate breeze, marked.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT MYJFIG. C THE WIND AT MEXICOPLAN, 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 BREEZE19GUST, 22 MPH6STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEMexico, the windSTATION REPORT · ASOS MYJTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-MYJ-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

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

0in

Snow on the ground

Measured at Vandalia (VNDM7), 0.3 miles from here, read 14 Oct, 05:00. measured daily

Elsewhere in Missouri

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

Near Vandalia

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

Near Vandalia

River and lake gauges