Air Quality in Westminster, United States

Windy
24.9°C · 45.2% humidity
24.9°
Feels 24.9°
16
Good
Air quality is satisfactory. Enjoy outdoor activities.
12 stations

Nearby Monitoring Stations

AQI Forecast
54 12pm
54
54
16 3pm
21
25
20 6pm
29
31
32 9pm
32
33
33 12am
33
34
34 3am
34
34
54 6am
54
54
54 9am
54
54
AD 728×90

Air Quality Index Trend

48h · 2 stn

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

45.2%
Humidity
52.3 km/h
Wind SW
1011.9 hPa
Pressure
17.4
UV Extreme
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5
16
3.93 µg/m³
PM10▲
19
20.55 µg/m³
050100150200300500

What is the weather forecast for Westminster?

Temperature & Precipitation

PM2.5 Trend

48h · 2 stations
PM2.53.93 µg/m³ ✓ WHO
Good
PM1020.55 µg/m³
Good
UV INDEX17.4
Extreme
AD 300×250
Station readings (12 stations within 25 km)
3.93
Median
4.14
Average
2.61
Low
6.18
High
PM2.5 µg/m³ · Model: 7.35 · Bias: +3.4

What is the 7-day forecast for Westminster?

05-28
22.4° 16.7°
05-29
24.9° 17.8°
05-30
20.5° 16.6°
05-31
23.2° 18.6°
06-01
23.1° 18.2°
06-02
24.1° 16.0°
06-03
22.8° 16.3°
Both models agree Avg diff: 1.6°C

Where are air quality stations near Westminster?

12
Davis Elementary
13.2 km PM2.5: 3.0 µg/m³
15
Monroe Elementary
14.2 km PM2.5: 3.7 µg/m³
16
Kennedy Elementary
14.4 km PM2.5: 3.8 µg/m³
16
Villa Intermediate
14.7 km PM2.5: 3.8 µg/m³
17
Century High School
14.9 km PM2.5: 4.1 µg/m³
18
Wilmington Pk ES (7781)
22.3 km PM2.5: 4.4 µg/m³
26
Watson Yard
23.3 km PM2.5: 6.2 µg/m³
17
Wilmington Public Library - Outside
23.9 km PM2.5: 4.1 µg/m³
11
Wilmington Public Library - Inside
24.1 km PM2.5: 2.6 µg/m³
17
Broad Ave ES (2527)
24.1 km PM2.5: 4.0 µg/m³

What cities are near Westminster?

17 Stanton 15 Garden Grove 20 Cypress 15 Fountain Valley 19 Seal Beach 21 La Palma 15 Huntington Beach 15 Anaheim 21 Buena Park 22 Cerritos
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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 2026-05-28T22:52 UTC.