What is the air quality in Merrillville today?

The current Air Quality Index (AQI) in Merrillville is 47 (Good). PM2.5 concentration is 11.23 µg/m³.

What is the temperature in Merrillville right now?

The current temperature in Merrillville is 23.6°C (feels like 23.6°C). Humidity is 67.9% and wind speed is 38.9 km/h.

Is it safe to go outside in Merrillville?

Air quality is satisfactory. Enjoy outdoor activities. The UV Index is 5.9 (High).

Air Quality in Merrillville, United States

Partly Cloudy

23.6°C · 67.9% humidity

23.6°

Feels 23.6°

Good

Air quality is satisfactory. Enjoy outdoor activities.

6 stations

Nearby Monitoring Stations

AQI Forecast

25 2pm

47 5pm

35 8pm

30 11pm

28 2am

83 5am

54 8am

84 11am

146

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.

67.9%

Humidity

38.9 km/h

Wind NNE

1014.2 hPa

Pressure

5.9

UV High

GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲

11.23 µg/m³

PM10

13.7 µg/m³

050100150200300500

What is the weather forecast for Merrillville?

Temperature & Precipitation

PM2.5 Trend

47h · 4 stations

PM2.511.23 µg/m³ ✓ WHO

Good

PM1013.7 µg/m³

Good

UV INDEX5.9

High

Station readings (6 stations within 25 km)

11.23

Median

11.58

Average

5.5

Low

15.4

High

PM2.5 µg/m³ · Model: 7.1 · Bias: -4.1

What is the 7-day forecast for Merrillville?

07-21

27.5° 21.6°

1.69 mm

07-22

25.0° 19.9°

07-23

23.3° 16.1°

6.56 mm

07-24

26.7° 15.7°

07-25

22.9° 16.8°

0.19 mm

07-26

27.0° 19.8°

3.13 mm

07-27

25.1° 20.6°

0.88 mm

Both models agree Avg diff: 3.5°C

Where are air quality stations near Merrillville?

Hammond-167th St, Indiana, USA

18.3 km PM2.5: 8.2 µg/m³

Hegewisch 3

25.3 km PM2.5: 15.4 µg/m³

Hegewisch 4

26.1 km PM2.5: 16.5 µg/m³

Hegewisch 2

26.5 km PM2.5: 14.2 µg/m³

Hegewisch 5

26.5 km PM2.5: 16.2 µg/m³

Hegewisch 6

27.1 km PM2.5: 15.6 µg/m³

Hegewisch 1

27.5 km PM2.5: 15.2 µg/m³

South Deering 6

27.8 km PM2.5: 22.8 µg/m³

East Side 4

28.4 km PM2.5: 15.5 µg/m³

Washington HS Collocation 1

28.5 km PM2.5: 16.1 µg/m³

What cities are near Merrillville?

45 Crown Point 48 Hobart 54 Griffith 54 Schererville 52 Gary 54 Highland 55 Dyer 56 Portage 53 Munster 39 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 2026-07-21T22:04 UTC.