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Speedway, Indiana

Town in Marion County, Indiana

Air quality

The air at Speedway

Index 34, good, led by fine particles. Read at 2 AM from its reporting area, Indianapolis (IN), 5 miles off.

34Good
  • Fine particles (PM2.5)34Good2 mi
  • Ozone17Good13 ppb4.9 mi
  • Coarse particles (PM10)13Good7.2 mi
  • Nitrogen dioxide7Good7.1 ppb6.4 mi
  • Sulfur dioxide0Good0 ppb7.2 mi

The days ahead

Good each day through Today, led by fine particles. Yesterday measured 55, moderate.

Smoke, the next 42 hours

No smoke near the ground through Sat 8 PM.

FriSat

Precipitation

What has fallen at Speedway

0.16 in in the last 24 hours, 0.18 in over the last 3 days, to Fri 2 AM. Measured by radar and rain gauges, as water.

Last 24 hours
0.16in
Last 3 days
0.18in

Visibility

How far you can see at Speedway, the next 42 hours

Visibility stays 8 miles or more through Sat 8 PM, lowest 9 miles Fri 6 AM.

FriSat

On the radar over Speedway, IndianaReflectivityStorm topsRain rateRain, last 24 hoursForecast temperatureForecast rain totalEvery picture

What is measuring near here

The 6 instruments nearest Speedway, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 0.3 miles away.

measured now4 instruments

measured daily2 instruments

Station report

The weather at Indianapolis, drawn

The nearest airport reporting now, 2.9 mi from Speedway, Indiana. From its report of Oct 16, 2026, 2:53 AM local time: 3 of its 6 sheets.

The sky

Scattered at 1,300 ft, broken at 2,000 ft, overcast at 3,200 ft; the ceiling is 2,000 ft; visibility 7 mi.

Section of the sky over Indianapolis, height above the station to scale: scattered cloud with its base at 1,300 feet, broken cloud with its base at 2,000 feet, overcast cloud with its base at 3,200 feet, the ceiling at 2,000 feet, and visibility of 7 mi.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT EYEFIG. A THE SKY OVER INDIANAPOLISSECTION, 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 STATION01,0002,0003,0004,0005,000ETAGESLOWTHE STATIONTHE CEILOMETER READS TO 12,000 FT, ABOVE THIS SHEETOVC 3,200 FTOVERCAST, 8 EIGHTHS OF THE SKYBKN 2,000 FTBROKEN, 5 TO 7 EIGHTHS OF THE SKYSCT 1,300 FTSCATTERED, 3 TO 4 EIGHTHS OF THE SKYCEILING 2,000 FTVISIBILITY, MILES: 7 MI0510TITLEIndianapolis, the skySTATION REPORT · ASOS EYETYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-EYE-1DRAWN AS linework on paperSOURCES FB-SKY-001, FB-SKY-017, FB-SKY-016, FB-SKY-018

The air

72.0 F with a dew point of 69.0 F, 90 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 700 ft up; the lowest cloud reported is at 1,300 ft.

Chart of the air at Indianapolis: temperature 72.0 degrees Fahrenheit and dew point 69.0, 90 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 700 feet above the station, against the lowest cloud reported at 1,300 feet; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT EYEFIG. B THE AIR AT INDIANAPOLISTHE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION01,0002,0003,00060 F70 F80 FSATURATES 700 FT ABOVE THE STATION, AT 68.3 FLOWEST CLOUD REPORTED, SCT 1,300 FTTEMPERATURE 72.0 FDEW POINT 69.0 FSPREAD 3.0 FRELATIVE HUMIDITY 90 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 POINTTITLEIndianapolis, the airSTATION REPORT · ASOS EYETYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-EYE-2DRAWN AS linework on paperSOURCES FB-WAT-020, FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the west (270 degrees) at 17 mph, gusting 31 mph: force 4, a moderate breeze on the Beaufort scale. The strongest gust today was 31 mph.

Plan of the wind at Indianapolis, north up: blowing from 270 degrees, the west, at 17 miles an hour, gusting 31; beside it the Beaufort scale from calm to hurricane force, force 4, moderate breeze, marked.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT EYEFIG. C THE WIND AT INDIANAPOLISPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 270°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE43GENTLE BREEZE84MODERATE BREEZE13NOW, 17 MPH5FRESH BREEZE196STRONG BREEZE25GUST, 31 MPH7NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEIndianapolis, the windSTATION REPORT · ASOS EYETYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-EYE-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

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

0in

Snow on the ground

Measured at Indianapolis Nwfo (INXI3), 6.4 miles from here, read 16 Oct, 02:00. measured daily

Elsewhere in Indiana

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

Near Speedway

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

Near Speedway

River and lake gauges