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Merton, Wisconsin

Village in Waukesha County, Wisconsin

Air quality

The air at Merton

Index 23, good, led by fine particles. Read at 10 PM from its reporting area, Milwaukee-Ozaukee (WI), 18 miles off.

23Good
  • Fine particles (PM2.5)23Good-
  • Ozone19Good-
  • Coarse particles (PM10)6Good-

The days ahead

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

Smoke, the next 46 hours

No smoke near the ground through Sat 7 PM.

FriSat

Precipitation

What has fallen at Merton

0.54 in in the last 24 hours, and none in the 2 days before, to Thu 9 PM. Measured by radar and rain gauges, as water.

Last 24 hours
0.54in
Last 3 days
0.54in

Visibility

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

Visibility stays 6 miles or more through Sat 7 PM, lowest 6 miles Fri 12 AM.

FriSat

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

What is measuring near here

The 6 instruments nearest Merton, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 0.5 miles away.

measured now4 instruments

Pewaukee WWTPPWKW3

At a water treatment plant/5.5 mi away/912 ft/61 ft below here

temp, wind, gust, humidity, pressure

Rank-

measured daily2 instruments

Hartland 2.9 NNEWI-WK-170

In a volunteer observer's own ground/0.5 mi away/983 ft/10 ft above here

precip, snowfall, snow depth

Rank-

RichrieldRCHW3

At a cooperative observer's station/7.0 mi away/1,073 ft/100 ft above here

snowfall, snow depth, precip, high, low

Rank203of 1,313

Station report

The weather at Waukesha Cnty, drawn

The nearest airport reporting now, 7.8 mi from Merton, Wisconsin. From its report of Oct 15, 2026, 10:15 PM local time: 3 of its 6 sheets.

The sky

Broken at 800 ft, overcast at 1,300 ft; the ceiling is 800 ft; visibility 10 mi or more.

Section of the sky over Waukesha Cnty, height above the station to scale: broken cloud with its base at 800 feet, overcast cloud with its base at 1,300 feet, the ceiling at 800 feet, and visibility of 10 mi or more.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT UESFIG. A THE SKY OVER WAUKESHA CNTYSECTION, 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 1,300 FTOVERCAST, 8 EIGHTHS OF THE SKYBKN 800 FTBROKEN, 5 TO 7 EIGHTHS OF THE SKYCEILING 800 FTVISIBILITY, MILES: 10 MI OR MORE0510TITLEWaukesha Cnty, the skySTATION REPORT · ASOS UESTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-UES-1DRAWN AS linework on paperSOURCES FB-SKY-001, FB-SKY-017, FB-SKY-016, FB-SKY-018

The air

57.2 F with a dew point of 57.2 F, 100 per cent relative humidity. The air is saturated at the ground; the lowest cloud reported is at 800 ft.

Chart of the air at Waukesha Cnty: temperature 57.2 degrees Fahrenheit and dew point 57.2, 100 per cent relative humidity; the air saturated at the ground, against the lowest cloud reported at 800 feet; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT UESFIG. B THE AIR AT WAUKESHA CNTYTHE 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 FSATURATED AT THE GROUNDLOWEST CLOUD REPORTED, BKN 800 FTTEMPERATURE AND DEW POINT 57.2 F, 57.2 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 POINTTITLEWaukesha Cnty, the airSTATION REPORT · ASOS UESTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-UES-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 15 mph, gusting 20 mph: force 4, a moderate breeze on the Beaufort scale. The strongest gust today was 21 mph.

Plan of the wind at Waukesha Cnty, north up: blowing from 280 degrees, the west, at 15 miles an hour, gusting 20; beside it the Beaufort scale from calm to hurricane force, force 4, moderate breeze, marked.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT UESFIG. C THE WIND AT WAUKESHA CNTYPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 280°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE43GENTLE BREEZE84MODERATE BREEZE13NOW, 15 MPH5FRESH BREEZE19GUST, 20 MPH6STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEWaukesha Cnty, the windSTATION REPORT · ASOS UESTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-UES-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

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

-

Snow on the ground

Elsewhere in Wisconsin

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

Near Merton

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

Near Merton

River and lake gauges