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Chatham, Illinois

Village in Sangamon County, Illinois

Air quality

The air at Chatham

Index 14, good, led by ozone. Read at 2 AM from its reporting area, Springfield (IL), 10 miles off.

14Good
  • Fine particles (PM2.5)6Good-
  • Ozone14Good-

The days ahead

Good each day through Mon Oct 19, led by fine particles. Yesterday measured 29, good.

Smoke, the next 41 hours

No smoke near the ground through Sat 7 PM.

FriSat

Precipitation

What has fallen at Chatham

0.63 in in the last 24 hours, 0.65 in over the last 3 days, to Fri 1 AM. Measured by radar and rain gauges, as water.

Last 24 hours
0.63in
Last 3 days
0.65in

Visibility

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

Visibility stays 9 miles or more through Sat 7 PM, lowest 10 miles Sat 7 AM.

FriSat

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

What is measuring near here

The 5 instruments nearest Chatham, 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

measured daily2 instruments

Chatham 0.3 WIL-SG-9

In a volunteer observer's own ground/0.5 mi away/614 ft/13 ft above here

precip, snowfall, snow depth

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Station report

The weather at Springfield, drawn

The nearest airport reporting now, 11.5 mi from Chatham, Illinois. From its report of Oct 16, 2026, 2:06 AM local time: 3 of its 6 sheets.

The sky

Scattered at 2,400 ft, broken at 3,200 ft, overcast at 12,000 ft; the ceiling is 3,200 ft; visibility 10 mi or more.

Section of the sky over Springfield, height above the station to scale: scattered cloud with its base at 2,400 feet, broken cloud with its base at 3,200 feet, overcast cloud with its base at 12,000 feet, the ceiling at 3,200 feet, and visibility of 10 mi or more.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT SPIFIG. A THE SKY OVER SPRINGFIELDSECTION, 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 STATION02,5005,0007,50010,00012,50015,00017,50020,000ETAGESLOWMIDDLEHIGHTHE STATIONTHE CEILOMETER READS TO 12,000 FTOVC 12,000 FTOVERCAST, 8 EIGHTHS OF THE SKYBKN 3,200 FTBROKEN, 5 TO 7 EIGHTHS OF THE SKYSCT 2,400 FTSCATTERED, 3 TO 4 EIGHTHS OF THE SKYCEILING 3,200 FTVISIBILITY, MILES: 10 MI OR MORE0510TITLESpringfield, the skySTATION REPORT · ASOS SPITYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-SPI-1DRAWN AS linework on paperSOURCES FB-SKY-001, FB-SKY-017, FB-SKY-016, FB-SKY-018, FB-SKY-013, FB-SKY-014

The air

54.0 F with a dew point of 47.0 F, 77 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 1,600 ft up; the lowest cloud reported is at 2,400 ft.

Chart of the air at Springfield: temperature 54.0 degrees Fahrenheit and dew point 47.0, 77 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 1,600 feet above the station, against the lowest cloud reported at 2,400 feet; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT SPIFIG. B THE AIR AT SPRINGFIELDTHE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION01,0002,0003,00030 F40 F50 F60 FSATURATES 1,600 FT ABOVE THE STATION, AT 45.4 FLOWEST CLOUD REPORTED, SCT 2,400 FTTEMPERATURE 54.0 FDEW POINT 47.0 FSPREAD 7.0 FRELATIVE HUMIDITY 77 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 POINTTITLESpringfield, the airSTATION REPORT · ASOS SPITYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-SPI-2DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the northwest (310 degrees) at 16 mph, gusting 26 mph: force 4, a moderate breeze on the Beaufort scale. The strongest gust today was 33 mph.

Plan of the wind at Springfield, north up: blowing from 310 degrees, the northwest, at 16 miles an hour, gusting 26; beside it the Beaufort scale from calm to hurricane force, force 4, moderate breeze, marked.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT SPIFIG. C THE WIND AT SPRINGFIELDPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 310°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE43GENTLE BREEZE84MODERATE BREEZE13NOW, 16 MPH5FRESH BREEZE196STRONG BREEZE25GUST, 26 MPH7NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLESpringfield, the windSTATION REPORT · ASOS SPITYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-SPI-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

The full report of Springfield, 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 Chatham

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

Near Chatham

River and lake gauges