Storm Station
Mendota, Illinois
58°
Partly cloudy· Feels like 58°·Light breeze 5 mph E
Mostly cloudy, with a low around 50. East wind around 5 mph.
-UV
-Air quality
73%Humidity
58%Cloud

What is measuring near here

The 5 instruments nearest Mendota, 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 now3 instruments

PeruVYS

At an airfield/13.8 mi away/653 ft/90 ft below here

temp, wind, gust, visibility, precip, pressure

Rank376of 417

Illinois River AT Starved RockSRDI2

At a river or reservoir gauge/20.5 mi away/558 ft/185 ft below here

temp, wind, gust, humidity, pressure

Rank404of 417

Shabbona 5 NNE54811

At a climate reference station/24.4 mi away/861 ft/118 ft above here

temp, humidity, wind, solar, precip

Rank-

measured daily2 instruments

Mendota 0.6 WSWIL-LS-77

In a volunteer observer's own ground/0.5 mi away/757 ft/14 ft above here

precip, snowfall, snow depth

Rank-

Mendota 1SMDTI2

At a cooperative observer's station/1.4 mi away/719 ft/24 ft below here

snowfall, snow depth, precip, high, low

Rank-

Station report

The weather at Peru, drawn

The nearest airport reporting now, 13.8 mi from Mendota. From its report of Sep 27, 2026, 4:01 AM local time: 3 of its 6 sheets.

The sky

No cloud below 12,000 ft; visibility 7 mi.

Section of the sky over Peru, height above the station to scale: no cloud detected below 12,000 feet, the reach of its ceilometer, and visibility of 7 mi.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT VYSFIG. A THE SKY OVER PERUSECTION, 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 SHEETNO CLOUD DETECTED BELOW 12,000 FTVISIBILITY, MILES: 7 MI0510TITLEPeru, the skySTATION REPORT · ASOS VYSTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-09-27IDSR-VYS-1DRAWN AS linework on paperSOURCES FB-SKY-001

The air

50.0 F with a dew point of 48.2 F, 93 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 400 ft up.

Chart of the air at Peru: temperature 50.0 degrees Fahrenheit and dew point 48.2, 93 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; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT VYSFIG. B THE AIR AT PERUTHE 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 FSATURATES 400 FT ABOVE THE STATION, AT 47.8 FTEMPERATURE AND DEW POINT 50.0 F, 48.2 FRELATIVE HUMIDITY 93 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 POINTTITLEPeru, the airSTATION REPORT · ASOS VYSTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-09-27IDSR-VYS-2DRAWN AS linework on paperSOURCES FB-WAT-020, FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the north (10 degrees) at 3 mph: force 1, a light air on the Beaufort scale.

Plan of the wind at Peru, north up: blowing from 10 degrees, the north, at 3 miles an hour; beside it the Beaufort scale from calm to hurricane force, force 1, light air, marked.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT VYSFIG. C THE WIND AT PERUPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 10°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR1NOW, 3 MPH2LIGHT BREEZE43GENTLE BREEZE84MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEPeru, the windSTATION REPORT · ASOS VYSTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-09-27IDSR-VYS-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

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

-in

Snow on the ground

Elsewhere in Illinois

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

Near Mendota

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