What is the air quality in Merrillville today?

The current Air Quality Index (AQI) in Merrillville is 16 (Good). PM2.5 concentration is 3.8 µg/m³.

What is the temperature in Merrillville right now?

The current temperature in Merrillville is 17.9°C (feels like 17.9°C). Humidity is 56.4% and wind speed is 24.5 km/h.

Is it safe to go outside in Merrillville?

Air quality is satisfactory. Enjoy outdoor activities. The UV Index is 0.7 (Low).

Air Quality in Merrillville, United States

Partly Cloudy

17.9°C · 56.4% humidity

17.9°

Feels 17.9°

Good

Air quality is satisfactory. Enjoy outdoor activities.

1 station

Nearby Monitoring Stations

AQI Forecast

34 4pm

16 7pm

20 10pm

23 1am

23 4am

24 7am

24 10am

25 1pm

Air Quality Index Trend

47h · 4 stn

View full history →

Merrillville's air quality is primarily affected by vehicle emissions and industrial activity. Seasonal wildfire smoke and weather patterns can cause periodic air quality deterioration.

56.4%

Humidity

24.5 km/h

Wind N

1010.3 hPa

Pressure

0.7

UV Low

GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲

3.8 µg/m³

PM10

13.7 µg/m³

050100150200300500

What is the weather forecast for Merrillville?

Temperature & Precipitation

PM2.5 Trend

47h · 4 stations

PM2.53.8 µg/m³ ✓ WHO

Good

PM1013.7 µg/m³

Good

UV INDEX0.7

Low

Station readings (1 station within 25 km)

3.8

Median

3.8

Average

3.8

Low

3.8

High

PM2.5 µg/m³ · Model: 6.5 · Bias: +2.7

What is the 7-day forecast for Merrillville?

06-09

32.4° 13.7°

0.5 mm

06-10

20.9° 17.6°

18.06 mm

06-11

25.7° 15.2°

06-12

31.0° 20.0°

9.06 mm

06-13

30.0° 22.7°

7.25 mm

06-14

31.2° 15.8°

06-15

33.8° 23.1°

Both models agree Avg diff: 6.2°C

Where are air quality stations near Merrillville?

Hammond-167th St, Indiana, USA

18.3 km PM2.5: 13.5 µg/m³

Hegewisch 3

25.3 km PM2.5: 6.8 µg/m³

Hegewisch 4

26.1 km PM2.5: 5.1 µg/m³

Hegewisch 2

26.5 km PM2.5: 6.4 µg/m³

Hegewisch 5

26.5 km PM2.5: 7.2 µg/m³

Hegewisch 6

27.1 km PM2.5: 6.8 µg/m³

Hegewisch 1

27.5 km PM2.5: 6.6 µg/m³

South Deering 6

27.8 km PM2.5: 7.2 µg/m³

East Side 4

28.4 km PM2.5: 7.1 µg/m³

Washington HS Collocation 1

28.5 km PM2.5: 6.1 µg/m³

What cities are near Merrillville?

16 Crown Point 36 Hobart 28 Griffith 26 Schererville 28 Gary 29 Highland 28 Dyer 39 Portage 28 Munster 28 Hammond

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Data sources: AQI from ground-level monitoring stations via AQICN. Weather forecast from ECMWF (IFS & CAMS models). AQI calculated using US EPA standard. Updated 2026-06-09T00:59 UTC.