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Lannon, Wisconsin

Village in Waukesha County, Wisconsin

Air quality

The air at Lannon

Index 15, good, led by ozone. Read at 12 AM from its reporting area, Milwaukee-Ozaukee (WI), 11 miles off.

15Good
  • Fine particles (PM2.5)13Good9.2 mi
  • Ozone15Good9 ppb9.2 mi
  • Coarse particles (PM10)4Good9.2 mi
  • Nitrogen dioxide5Good5.2 ppb19.2 mi
  • Carbon monoxide-0.3 ppm19.2 mi

The days ahead

Good each day through Sat Oct 17, led by ozone. Yesterday measured 26, good.

Smoke, the next 43 hours

No smoke near the ground through Sat 7 PM.

FriSat

Precipitation

What has fallen at Lannon

0.58 in in the last 24 hours, and none in the 2 days before, to Fri 12 AM. Measured by radar and rain gauges, as water.

Last 24 hours
0.58in
Last 3 days
0.58in

Visibility

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

Visibility stays 8 miles or more through Sat 7 PM, lowest 8 miles Fri 1 AM.

FriSat

On the radar over Lannon, WisconsinReflectivityStorm topsRain rateRain, last 24 hoursForecast temperatureForecast rain totalEvery picture

What is measuring near here

The 6 instruments nearest Lannon, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 1.2 miles away.

measured now4 instruments

Pewaukee WWTPPWKW3

At a water treatment plant/8.8 mi away/912 ft/17 ft above here

temp, wind, gust, humidity, pressure

Rank-

measured daily2 instruments

GermantownGERW3

At a cooperative observer's station/4.9 mi away/846 ft/49 ft below here

snowfall, snow depth, precip, high, low

Rank901of 1,313

Station report

The weather at Milwaukee/Lawren, drawn

The nearest airport reporting now, 7.1 mi from Lannon, Wisconsin. From its report of Oct 16, 2026, 12:55 AM local time: 3 of its 6 sheets.

The sky

Overcast at 1,100 ft; the ceiling is 1,100 ft; visibility 10 mi or more.

Section of the sky over Milwaukee/Lawren, height above the station to scale: overcast cloud with its base at 1,100 feet, the ceiling at 1,100 feet, and visibility of 10 mi or more.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT MWCFIG. A THE SKY OVER MILWAUKEE/LAWRENSECTION, 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 SHEETOVC 1,100 FTOVERCAST, 8 EIGHTHS OF THE SKYCEILING 1,100 FTVISIBILITY, MILES: 10 MI OR MORE0510TITLEMilwaukee/Lawren, the skySTATION REPORT · ASOS MWCTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-MWC-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 51.8 F, 100 per cent relative humidity. The air is saturated at the ground; the lowest cloud reported is at 1,100 ft.

Chart of the air at Milwaukee/Lawren: temperature 51.8 degrees Fahrenheit and dew point 51.8, 100 per cent relative humidity; the air saturated at the ground, against the lowest cloud reported at 1,100 feet; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT MWCFIG. B THE AIR AT MILWAUKEE/LAWRENTHE 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 FSATURATED AT THE GROUNDLOWEST CLOUD REPORTED, OVC 1,100 FTTEMPERATURE AND DEW POINT 51.8 F, 51.8 FRELATIVE HUMIDITY 100 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 POINTTITLEMilwaukee/Lawren, the airSTATION REPORT · ASOS MWCTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-MWC-2DRAWN AS linework on paperSOURCES FB-WAT-020, FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the west (280 degrees) at 17 mph, gusting 24 mph: force 4, a moderate breeze on the Beaufort scale. The strongest gust today was 25 mph.

Plan of the wind at Milwaukee/Lawren, north up: blowing from 280 degrees, the west, at 17 miles an hour, gusting 24; beside it the Beaufort scale from calm to hurricane force, force 4, moderate breeze, marked.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT MWCFIG. C THE WIND AT MILWAUKEE/LAWRENPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 280°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE43GENTLE BREEZE84MODERATE BREEZE13NOW, 17 MPH5FRESH BREEZE19GUST, 24 MPH6STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEMilwaukee/Lawren, the windSTATION REPORT · ASOS MWCTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-MWC-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

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

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Snow on the ground

Elsewhere in Wisconsin

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

Near Lannon

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

Near Lannon

River and lake gauges