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Mehlville, Missouri

Community in St. Louis County, Missouri

Air quality

The air at Mehlville

Index 19, good, led by ozone. Read at 6 AM from its reporting area, St. Louis (Metro-east) (IL), 19 miles off.

19Good
  • Fine particles (PM2.5)16Good5.5 mi
  • Ozone19Good16 ppb5.5 mi
  • Coarse particles (PM10)6Good5.5 mi
  • Nitrogen dioxide1Good1.3 ppb5.5 mi
  • Sulfur dioxide0Good0.4 ppb12.6 mi
  • Carbon monoxide-0.1 ppm9.3 mi

The days ahead

Good each day through Mon Oct 19, led by fine particles. Yesterday measured 39, good.

Smoke, the next 44 hours

No smoke near the ground through Sun 1 AM.

FriSat

Precipitation

What has fallen at Mehlville

0.37 in in the last 24 hours, 1.20 in over the last 3 days, to Fri 5 AM. Measured by radar and rain gauges, as water.

Last 24 hours
0.37in
Last 3 days
1.20in

Visibility

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

Visibility stays 8 miles or more through Sun 1 AM, lowest 9 miles Fri 6 PM.

FriSat

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

What is measuring near here

The 6 instruments nearest Mehlville, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 1.1 miles away.

measured now4 instruments

St. LouisSTL

At an airfield/17.5 mi away/561 ft/22 ft below here

temp, wind, gust, visibility, precip, pressure

Rank810of 1,014

measured daily2 instruments

Oakville 2.7 NWMO-SL-46

In a volunteer observer's own ground/1.1 mi away/547 ft/36 ft below here

precip, snowfall, snow depth

Rank-

Kirkwood 1NNWKWDM7

At a cooperative observer's station/8.4 mi away/661 ft/78 ft above here

snowfall, snow depth, precip, high, low

Rank-

Station report

The weather at St. Louis, drawn

The nearest airport reporting now, 17.5 mi from Mehlville, Missouri. From its report of Oct 16, 2026, 6:02 AM local time: 3 of its 6 sheets.

The sky

Scattered at 2,700 ft, broken at 3,500 ft, broken at 12,000 ft; the ceiling is 3,500 ft; visibility 10 mi or more.

Section of the sky over St. Louis, height above the station to scale: scattered cloud with its base at 2,700 feet, broken cloud with its base at 3,500 feet, broken cloud with its base at 12,000 feet, the ceiling at 3,500 feet, and visibility of 10 mi or more.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT STLFIG. A THE SKY OVER 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 STATION02,5005,0007,50010,00012,50015,00017,50020,000ETAGESLOWMIDDLEHIGHTHE STATIONTHE CEILOMETER READS TO 12,000 FTBKN 12,000 FTBROKEN, 5 TO 7 EIGHTHS OF THE SKYBKN 3,500 FTBROKEN, 5 TO 7 EIGHTHS OF THE SKYSCT 2,700 FTSCATTERED, 3 TO 4 EIGHTHS OF THE SKYCEILING 3,500 FTVISIBILITY, MILES: 10 MI OR MORE0510TITLESt. Louis, the skySTATION REPORT · ASOS STLTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-STL-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

54.0 F with a dew point of 43.0 F, 66 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 2,500 ft up; the lowest cloud reported is at 2,700 ft.

Chart of the air at St. Louis: temperature 54.0 degrees Fahrenheit and dew point 43.0, 66 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 2,500 feet above the station, against the lowest cloud reported at 2,700 feet; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT STLFIG. B THE AIR AT 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 STATION01,0002,0003,0004,00030 F40 F50 F60 FSATURATES 2,500 FT ABOVE THE STATION, AT 40.6 FLOWEST CLOUD REPORTED, SCT 2,700 FTTEMPERATURE 54.0 FDEW POINT 43.0 FSPREAD 11.0 FRELATIVE HUMIDITY 66 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 POINTTITLESt. Louis, the airSTATION REPORT · ASOS STLTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-STL-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 33 mph: force 5, a fresh breeze on the Beaufort scale. The strongest gust today was 35 mph.

Plan of the wind at St. Louis, north up: blowing from 310 degrees, the northwest, at 22 miles an hour, gusting 33; beside it the Beaufort scale from calm to hurricane force, force 5, fresh breeze, marked.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT STLFIG. C THE WIND AT 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, 33 MPH8GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLESt. Louis, the windSTATION REPORT · ASOS STLTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-STL-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

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

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Snow on the ground

Elsewhere in Missouri

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

Near Mehlville

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

Near Mehlville

River and lake gauges