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Jefferson, Wisconsin

City in Jefferson County, Wisconsin

Air quality

The air at Jefferson

Index 22, good, led by fine particles. Read at 10 PM from its reporting area, Kettle Moraine South (WI), 15 miles off.

22Good
  • Fine particles (PM2.5)22Good-
  • Ozone10Good-
  • Coarse particles (PM10)6Good-

The days ahead

Good each day through Sat Oct 17, led by ozone. Yesterday measured 23, good.

Smoke, the next 46 hours

No smoke near the ground through Sat 7 PM.

FriSat

Precipitation

What has fallen at Jefferson

0.50 in in the last 24 hours, 0.57 in over the last 3 days, to Thu 9 PM. Measured by radar and rain gauges, as water.

Last 24 hours
0.50in
Last 3 days
0.57in

Visibility

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

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

FriSat

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

What is measuring near here

The 6 instruments nearest Jefferson, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 0.4 miles away.

measured now4 instruments

WatertownRYV

At an airfield/12.2 mi away/814 ft/25 ft above here

temp, wind, gust, visibility, precip, pressure

Rank471of 1,313

measured daily2 instruments

Jefferson 0.3 NWI-JF-14

In a volunteer observer's own ground/0.4 mi away/803 ft/14 ft above here

precip, snowfall, snow depth

Rank-

Station report

The weather at Watertown, drawn

The nearest airport reporting now, 12.2 mi from Jefferson, Wisconsin. From its report of Oct 15, 2026, 10:15 PM local time: 3 of its 6 sheets.

The sky

Broken at 500 ft, overcast at 1,300 ft; the ceiling is 500 ft; visibility 10 mi or more.

Section of the sky over Watertown, height above the station to scale: broken cloud with its base at 500 feet, overcast cloud with its base at 1,300 feet, the ceiling at 500 feet, and visibility of 10 mi or more.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT RYVFIG. A THE SKY OVER WATERTOWNSECTION, 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 500 FTBROKEN, 5 TO 7 EIGHTHS OF THE SKYCEILING 500 FTVISIBILITY, MILES: 10 MI OR MORE0510TITLEWatertown, the skySTATION REPORT · ASOS RYVTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-RYV-1DRAWN AS linework on paperSOURCES FB-SKY-001, FB-SKY-017, FB-SKY-016, FB-SKY-018

The air

56.7 F with a dew point of 55.8 F, 97 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 200 ft up; the lowest cloud reported is at 500 ft.

Chart of the air at Watertown: temperature 56.7 degrees Fahrenheit and dew point 55.8, 97 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 200 feet above the station, against the lowest cloud reported at 500 feet; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT RYVFIG. B THE AIR AT WATERTOWNTHE 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 F70 FSATURATES 200 FT ABOVE THE STATION, AT 55.6 FLOWEST CLOUD REPORTED, BKN 500 FTTEMPERATURE AND DEW POINT 56.7 F, 55.8 FRELATIVE HUMIDITY 97 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 POINTTITLEWatertown, the airSTATION REPORT · ASOS RYVTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-RYV-2DRAWN AS linework on paperSOURCES FB-WAT-020, FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the west northwest (290 degrees) at 12 mph, gusting 23 mph: force 3, a gentle breeze on the Beaufort scale. The strongest gust today was 23 mph.

Plan of the wind at Watertown, north up: blowing from 290 degrees, the west northwest, at 12 miles an hour, gusting 23; beside it the Beaufort scale from calm to hurricane force, force 3, gentle breeze, marked.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT RYVFIG. C THE WIND AT WATERTOWNPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 290°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE43GENTLE BREEZE8NOW, 12 MPH4MODERATE BREEZE135FRESH BREEZE19GUST, 23 MPH6STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEWatertown, the windSTATION REPORT · ASOS RYVTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-RYV-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

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

0in

Snow on the ground

Measured at Jefferson - WWTP (JFNW3), 0.7 miles from here, read 15 Oct, 07:00. measured daily

Elsewhere in Wisconsin

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

Near Jefferson

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

Near Jefferson

River and lake gauges