Air Quality in Merrillville, United States
Windy
23.7°C · 48.9% humidity
23.7°
Feels 23.7°
33
Good
Air quality is satisfactory. Enjoy outdoor activities.
1 station
Nearby Monitoring Stations
AQI Forecast
27
11pm
27
27
33
2am
31
37
36
5am
36
35
26
8am
26
25
25
11am
25
27
27
2pm
27
34
34
5pm
27
27
34
8pm
34
34
Air Quality Index Trend
45h · 158 stnMerrillville's air quality is primarily affected by vehicle emissions and industrial activity. Seasonal wildfire smoke and weather patterns can cause periodic air quality deterioration.
48.9%
Humidity
61.0 km/h
Wind NNE
1018.8 hPa
Pressure
5.9
UV High
GoodModerateUSGUnhealthyVery UnhealthyHazardous
Which pollutant is driving the AQI?
PM2.5▲
7.9 µg/m³
PM10
20.55 µg/m³
050100150200300500
What is the weather forecast for Merrillville?
Temperature & Precipitation
PM2.5 Trend
45h · 158 stationsPM2.57.9 µg/m³
✓ WHO
Good
PM1020.55 µg/m³
Good
UV INDEX5.9
High
Station readings (1 station within 25 km)
7.9
Median
7.9
Average
7.9
Low
7.9
High
PM2.5 µg/m³ · Model: 10.0 · Bias: +2.1
What is the 7-day forecast for Merrillville?
08-03
23.7° 17.0°
10.69 mm
08-04
34.3° 17.9°
0.38 mm
08-05
31.6° 17.3°
1.63 mm
08-06
34.8° 22.0°
0.88 mm
08-07
31.0° 18.2°
08-08
33.8° 17.6°
2.06 mm
08-09
34.2° 22.6°
0.38 mm
Both models agree
Avg diff: 3.8°C
Where are air quality stations near Merrillville?
122
Hammond-167th St, Indiana, USA
13
Ogden Dunes, Indiana, USA
46
East Chicago - Marina, Indiana, USA
50
Kingery Near-road #1, Illinois, USA
51
Kingery Near-road #1, Illinois, USA
50
Kingery Near-road #1, Illinois, USA
51
Kingery Near-road #1, Illinois, USA
54
Hegewisch 3
51
Hegewisch 4
53
Hegewisch 2
What cities are near Merrillville?
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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 2026-08-08T07:24 UTC.