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Mazon, Illinois

Village in Grundy County, Illinois

Air quality

The air at Mazon

Index 9, good, led by fine particles. Read at 2 AM from its reporting area, Joliet and Will County (IL), 19 miles off.

9Good
  • Fine particles (PM2.5)9Good-
  • Ozone8Good-

The days ahead

Good each day through Mon Oct 19, led by fine particles. Yesterday measured 28, good.

Smoke, the next 41 hours

No smoke near the ground through Sat 7 PM.

FriSat

Precipitation

What has fallen at Mazon

0.19 in in the last 24 hours, 0.50 in over the last 3 days, to Fri 1 AM. Measured by radar and rain gauges, as water.

Last 24 hours
0.19in
Last 3 days
0.50in

Visibility

How far you can see at Mazon, the next 41 hours

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

FriSat

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

What is measuring near here

The 6 instruments nearest Mazon, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 0.1 miles away.

measured now4 instruments

Morris-WashburnC09

At an airfield/12.8 mi away/584 ft/6 ft below here

temp, wind, gust, visibility, precip, pressure

Rank-

measured daily2 instruments

Mazon 0.0 WNWIL-GY-36

In a volunteer observer's own ground/0.1 mi away/592 ft/2 ft above here

precip, snowfall, snow depth

Rank-

Morris 1NWMOSI2

At a cooperative observer's station/9.0 mi away/522 ft/68 ft below here

snowfall, snow depth, precip, high, low

Rank982of 1,393

Station report

The weather at Citizen station EW7868, drawn

The nearest instrument reporting now, 14.2 mi from Mazon, Illinois. From its report of undefined: 3 of its 4 sheets.

The wind

From the west northwest (282 degrees) at 5 mph, gusting 7 mph: force 2, a light breeze on the Beaufort scale.

Plan of the wind at Citizen station EW7868, north up: blowing from 282 degrees, the west northwest, at 5 miles an hour, gusting 7; beside it the Beaufort scale from calm to hurricane force, force 2, light breeze, marked.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT EW7868FIG. C THE WIND AT CITIZEN STATION EW7868PLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 282°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE4NOW, 5 MPH3GENTLE BREEZE84MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLECitizen station EW7868, the windSTATION REPORT · CWOP EW7868TYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 1 of 4DATE2026-10-16IDSR-EW7868-1DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008

The column

At 615 ft above sea level, 2 per cent of the atmosphere's air lies below the station. The standard atmosphere puts the pressure there at 29.26 inHg and the temperature at 56.8 F; the station's altimeter setting of 29.87 inHg means its barometer reads 29.21 inHg; it reports 54.0 F, 2.8 F colder than standard.

Section from sea level of where Citizen station EW7868 stands in the atmosphere, height to scale: the station 615 feet above sea level with 2 per cent of the air below it; the standard atmosphere's pressure there, 29.26 inches of mercury, and temperature, 56.8 degrees Fahrenheit; the altimeter setting of 29.87 and the station pressure it means, 29.21.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT EW7868FIG. D WHERE CITIZEN STATION EW7868 STANDS IN THE ATMOSPHERESECTION FROM SEA LEVEL, HEIGHT TO SCALE, THE STATION IN THE STANDARD ATMOSPHEREFT ABOVE SEA LEVEL05,00010,00015,000SEA LEVEL, 29.92 inHg IN THE STANDARD ATMOSPHERECITIZEN STATION EW78682 PER CENT OF THE AIR BELOW IT615 FT10 PER CENT OF THE AIR BELOW, 2,890 FT20 PER CENT OF THE AIR BELOW, 6,050 FT30 PER CENT OF THE AIR BELOW, 9,540 FT40 PER CENT OF THE AIR BELOW, 13,470 FTSTANDARD PRESSURE HERE29.26 inHgSTANDARD TEMPERATURE HERE56.8 FALTIMETER SETTING, REPORTED29.87 inHgITS BAROMETER READS29.21 inHgTEMPERATURE, REPORTED54.0 FTITLECitizen station EW7868, the columnSTATION REPORT · CWOP EW7868TYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 4DATE2026-10-16IDSR-EW7868-2DRAWN AS linework on paperSOURCES FB-ENG-001, FB-ENG-003

The sun

On Oct 16 the noon sun stands 40 degrees above the horizon at 41.41 N, and the day is 10 h 55 min long. Level ground there takes 64 per cent of the noon sunlight a surface facing the sun would.

Elevation of the noon sun at Citizen station EW7868, angles true: on Oct 16 it stands 40 degrees above the horizon, against 72 at the June solstice, 49 at the equinoxes and 25 at the December solstice; the day is 10 h 55 min long.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT EW7868FIG. E THE SUN AT CITIZEN STATION EW7868ELEVATION LOOKING WEST, SOUTH TO THE LEFT: THE NOON SUN ON THE DAY OF THE REPORT, AND AT THE SOLSTICES AND EQUINOXES; ANGLES TRUETHE STATIONJUNE SOLSTICE 72°EQUINOXES 49°DECEMBER SOLSTICE 25°OCT 16, 40°SOUTHANGLES TRUE; THE RAYS ARE OF ONE LENGTH AND DRAW DIRECTION ONLYDAY LENGTH 10 H 55 MINLEVEL GROUND TAKES 64 PER CENT OF THE NOON SUN A FACING SURFACE WOULDLATITUDE 41.41 N; THE SUN'S DECLINATION -9.1°TITLECitizen station EW7868, the sunSTATION REPORT · CWOP EW7868TYPEELEVATIONSCALEANGLES TRUEREVAS REPORTED SHEET 3 of 4DATE2026-10-16IDSR-EW7868-3DRAWN AS linework on paperSOURCES FB-ENG-007

The full report of Citizen station EW7868, in 4 sheets, each beside the Field Book plates that explain it

0in

Snow on the ground

Measured at Morris 1NW (MOSI2), 9.0 miles from here, read 15 Oct, 08:00. measured daily

Elsewhere in Illinois

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

Near Mazon

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

Near Mazon

River and lake gauges