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Nachusa, Illinois

Community in Lee County, Illinois

Air quality

The air at Nachusa

Index 13, good, led by fine particles. Read at 10 PM from its reporting area, Rockford (IL), 38 miles off.

13Good
  • Fine particles (PM2.5)13Good-
  • Ozone7Good-

The days ahead

Good each day through Mon Oct 19, led by fine particles. Yesterday measured 27, good.

Smoke, the next 45 hours

No smoke near the ground through Sat 7 PM.

FriSat

Precipitation

What has fallen at Nachusa

0.43 in in the last 24 hours, 0.62 in over the last 3 days, to Thu 10 PM. Measured by radar and rain gauges, as water.

Last 24 hours
0.43in
Last 3 days
0.62in

Visibility

How far you can see at Nachusa, the next 45 hours

Visibility stays 8 miles or more through Sat 7 PM, lowest 8 miles Thu 11 PM.

FriSat

On the radar over Nachusa, IllinoisReflectivityStorm topsRain rateRain, last 24 hoursForecast temperatureForecast rain totalEvery picture

What is measuring near here

The 7 instruments nearest Nachusa, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 1.8 miles away.

measured now5 instruments

RochelleRPJ

At an airfield/16.1 mi away/781 ft/10 ft below here

temp, wind, gust, visibility, precip, pressure

Rank522of 1,393

measured daily2 instruments

Franklin Grove 2.4 WIL-LE-13

In a volunteer observer's own ground/1.8 mi away/817 ft/26 ft above here

precip, snowfall, snow depth

Rank-

Dixon WWTPDXNI2

At a water treatment plant/6.8 mi away/650 ft/141 ft below here

snowfall, snow depth, precip, high, low

Rank-

Station report

The weather at Rochelle, drawn

The nearest airport reporting now, 16.1 mi from Nachusa, Illinois. From its report of Oct 15, 2026, 10:35 PM local time: 3 of its 6 sheets.

The sky

Broken at 1,500 ft, overcast at 2,100 ft; the ceiling is 1,500 ft; visibility 10 mi or more.

Section of the sky over Rochelle, height above the station to scale: broken cloud with its base at 1,500 feet, overcast cloud with its base at 2,100 feet, the ceiling at 1,500 feet, and visibility of 10 mi or more.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT RPJFIG. A THE SKY OVER ROCHELLESECTION, 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 STATION05001,0001,5002,0002,5003,0003,500ETAGESLOWTHE STATIONTHE CEILOMETER READS TO 12,000 FT, ABOVE THIS SHEETOVC 2,100 FTOVERCAST, 8 EIGHTHS OF THE SKYBKN 1,500 FTBROKEN, 5 TO 7 EIGHTHS OF THE SKYCEILING 1,500 FTVISIBILITY, MILES: 10 MI OR MORE0510TITLERochelle, the skySTATION REPORT · ASOS RPJTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-RPJ-1DRAWN AS linework on paperSOURCES FB-SKY-001, FB-SKY-017, FB-SKY-016, FB-SKY-018

The air

56.5 F with a dew point of 55.0 F, 95 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 400 ft up; the lowest cloud reported is at 1,500 ft.

Chart of the air at Rochelle: temperature 56.5 degrees Fahrenheit and dew point 55.0, 95 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 400 feet above the station, against the lowest cloud reported at 1,500 feet; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT RPJFIG. B THE AIR AT ROCHELLETHE 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 400 FT ABOVE THE STATION, AT 54.6 FLOWEST CLOUD REPORTED, BKN 1,500 FTTEMPERATURE AND DEW POINT 56.5 F, 55.0 FRELATIVE HUMIDITY 95 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 POINTTITLERochelle, the airSTATION REPORT · ASOS RPJTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-RPJ-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 21 mph: force 3, a gentle breeze on the Beaufort scale. The strongest gust today was 26 mph.

Plan of the wind at Rochelle, north up: blowing from 290 degrees, the west northwest, at 12 miles an hour, gusting 21; beside it the Beaufort scale from calm to hurricane force, force 3, gentle breeze, marked.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT RPJFIG. C THE WIND AT ROCHELLEPLAN, 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, 21 MPH6STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLERochelle, the windSTATION REPORT · ASOS RPJTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-RPJ-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

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

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Snow on the ground

Elsewhere in Illinois

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

Near Nachusa

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

Near Nachusa

River and lake gauges