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Merrillville, Indiana

Town in Lake County, Indiana

Air quality

The air at Merrillville

Index 27, good, led by fine particles. Read at 1 AM from its reporting area, Hammond-Gary (IN), 6 miles off.

27Good
  • Fine particles (PM2.5)27Good-
  • Ozone9Good-
  • Coarse particles (PM10)11Good-

The days ahead

Good each day through Today, led by ozone. Yesterday measured 28, good.

Smoke, the next 42 hours

No smoke near the ground through Sat 7 PM.

FriSat

Precipitation

What has fallen at Merrillville

0.05 in in the last 24 hours, 0.27 in over the last 3 days, to Fri 1 AM. Measured by radar and rain gauges, as water.

Last 24 hours
0.05in
Last 3 days
0.27in

Visibility

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

Visibility stays 3 miles or more through Sat 7 PM, lowest 4 miles Fri 7 PM.

FriSat

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

What is measuring near here

The 6 instruments nearest Merrillville, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 1.3 miles away.

measured now4 instruments

measured daily2 instruments

Merrillville 1.8 NNWIN-LK-44

In a volunteer observer's own ground/1.3 mi away/632 ft/17 ft below here

precip, snowfall, snow depth

Rank-

Crown Point 1NCRPI3

At a cooperative observer's station/3.2 mi away/699 ft/50 ft above here

snowfall, snow depth, precip, high, low

Rank-

Station report

The weather at Gary Regional, drawn

The nearest airport reporting now, 9.5 mi from Merrillville, Indiana. From its report of Oct 16, 2026, 1:35 AM local time: 3 of its 6 sheets.

The sky

Overcast at 1,900 ft; the ceiling is 1,900 ft; visibility 10 mi or more.

Section of the sky over Gary Regional, height above the station to scale: overcast cloud with its base at 1,900 feet, the ceiling at 1,900 feet, and visibility of 10 mi or more.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT GYYFIG. A THE SKY OVER GARY REGIONALSECTION, 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 SHEETOVC 1,900 FTOVERCAST, 8 EIGHTHS OF THE SKYCEILING 1,900 FTVISIBILITY, MILES: 10 MI OR MORE0510TITLEGary Regional, the skySTATION REPORT · ASOS GYYTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-GYY-1DRAWN AS linework on paperSOURCES FB-SKY-001, FB-SKY-017, FB-SKY-016, FB-SKY-018

The air

59.0 F with a dew point of 59.0 F, 100 per cent relative humidity. The air is saturated at the ground; the lowest cloud reported is at 1,900 ft.

Chart of the air at Gary Regional: temperature 59.0 degrees Fahrenheit and dew point 59.0, 100 per cent relative humidity; the air saturated at the ground, against the lowest cloud reported at 1,900 feet; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT GYYFIG. B THE AIR AT GARY REGIONALTHE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION01,0002,0003,00050 F60 F70 FSATURATED AT THE GROUNDLOWEST CLOUD REPORTED, OVC 1,900 FTTEMPERATURE AND DEW POINT 59.0 F, 59.0 FRELATIVE HUMIDITY 100 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 POINTTITLEGary Regional, the airSTATION REPORT · ASOS GYYTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-GYY-2DRAWN AS linework on paperSOURCES FB-WAT-020, FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the west (280 degrees) at 21 mph, gusting 30 mph: force 5, a fresh breeze on the Beaufort scale. The strongest gust today was 31 mph.

Plan of the wind at Gary Regional, north up: blowing from 280 degrees, the west, at 21 miles an hour, gusting 30; beside it the Beaufort scale from calm to hurricane force, force 5, fresh breeze, marked.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT GYYFIG. C THE WIND AT GARY REGIONALPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 280°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE43GENTLE BREEZE84MODERATE BREEZE135FRESH BREEZE19NOW, 21 MPH6STRONG BREEZE25GUST, 30 MPH7NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEGary Regional, the windSTATION REPORT · ASOS GYYTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-GYY-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

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

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Snow on the ground

Elsewhere in Indiana

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

Near Merrillville

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

Near Merrillville

River and lake gauges