What is the air quality in Merrillville today?

The current Air Quality Index (AQI) in Merrillville is 33 (Good). PM2.5 concentration is 7.99 µg/m³.

What is the temperature in Merrillville right now?

The current temperature in Merrillville is 7.9°C (feels like 1.2°C). Humidity is 61.0% and wind speed is 85.5 km/h.

Is it safe to go outside in Merrillville?

Air quality is satisfactory. Enjoy outdoor activities. The UV Index is 0.0 (Low).

Air Quality in Merrillville, United States

Windy

7.9°C · 61.0% humidity

7.9°

Feels 1.2°

Good

Air quality is satisfactory. Enjoy outdoor activities.

5 stations

Nearby Monitoring Stations

AQI Forecast

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Air Quality Index Trend

46h · 220 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.

61.0%

Humidity

85.5 km/h

Wind NNE

1026.1 hPa

Pressure

0.0

UV Low

GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲

7.99 µg/m³

PM10

27.4 µg/m³

050100150200300500

What is the weather forecast for Merrillville?

Temperature & Precipitation

PM2.5 Trend

46h · 220 stations

PM2.57.99 µg/m³ ✓ WHO

Good

PM1027.4 µg/m³

Good

UV INDEX0.0

Low

Station readings (5 stations within 25 km)

7.99

Median

8.2

Average

1.9

Low

12.0

High

PM2.5 µg/m³ · Model: 13.5 · Bias: +5.5

What is the 7-day forecast for Merrillville?

10-20

10.5° 5.4°

0.06 mm

10-21

22.4° 11.0°

0.06 mm

10-22

16.9° 6.7°

0.62 mm

10-23

12.0° 6.7°

1.81 mm

10-24

22.9° 8.3°

10-25

13.6° 6.8°

0.06 mm

10-26

18.3° 5.3°

2.31 mm

Both models agree Avg diff: 4.0°C

Where are air quality stations near Merrillville?

Gary-IITRI, Indiana, USA

14.0 km PM2.5: 7.0 µg/m³

Hammond-167th St, Indiana, USA

18.3 km PM2.5: 12.6 µg/m³

Hammond-167th St, Indiana, USA

18.3 km PM2.5: 9.4 µg/m³

East Chicago - Marina, Indiana, USA

20.8 km PM2.5: 1.9 µg/m³

East Chicago - Marina, Indiana, USA

20.8 km PM2.5: 11.0 µg/m³

Kingery Near-road #1, Illinois, USA

21.5 km PM2.5: 12.0 µg/m³

Kingery Near-road #1, Illinois, USA

21.5 km PM2.5: 10.3 µg/m³

Hegewisch 3

25.3 km PM2.5: 14.6 µg/m³

Hegewisch 4

26.1 km PM2.5: 14.0 µg/m³

Hegewisch 2

26.5 km PM2.5: 15.2 µg/m³

What cities are near Merrillville?

38 Crown Point 26 Hobart 55 Griffith 52 Schererville 55 Gary 55 Highland 55 Dyer 27 Portage 53 Munster 41 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 2026-10-20T20:57 UTC.