Air Quality in Westminster, United States

Windy
19.4°C · 64.7% humidity
19.4°
Feels 19.4°
39
Good
Air quality is satisfactory. Enjoy outdoor activities.
12 stations

Nearby Monitoring Stations

AQI Forecast Calibrated
52 5pm
51
23
49 8pm
49
49
49 11pm
36
36
24 2am
24
24
24 5am
24
24
24 8am
24
24
24 11am
24
36
24 2pm
24
24
Station readings
52
51
23
CAMS model adj -1
50
50
50
50
50
50
50
37
37
25
25
25
25
25
25
25
25
25
25
25
37
25
25
25
AD 728×90

PM2.5 Trend (24h)

32h · 2 stations
64.7%
Humidity
62.6 km/h
Wind SSW
1013.5 hPa
Pressure
2.9
UV Moderate
GoodModerateUSGUnhealthyVery UnhealthyHazardous

What is the weather forecast for Westminster?

Temperature & Precipitation

PM2.59.36 µg/m³ ✓ WHO
Good
PM1020.55 µg/m³
Good
UV INDEX2.9
Moderate
AD 300×250
Station readings (12 stations within 25 km)
9.36
Median
8.88
Average
3.76
Low
10.6
High
PM2.5 µg/m³ · Model: 7.4 · Bias: -2.0

What is the 7-day forecast for Westminster?

04-09
20.8° 16.9°
04-10
19.1° 15.9°
13.62 mm
04-11
18.2° 15.0°
15.12 mm
04-12
17.3° 13.6°
0.31 mm
04-13
17.4° 13.8°
0.06 mm
04-14
20.9° 15.4°
04-15
22.0° 17.9°
Both models agree Avg diff: 1.6°C

Where are air quality stations near Westminster?

38
Davis Elementary
13.2 km PM2.5: 9.1 µg/m³
39
Monroe Elementary
14.2 km PM2.5: 9.3 µg/m³
41
Kennedy Elementary
14.4 km PM2.5: 9.9 µg/m³
41
Villa Intermediate
14.7 km PM2.5: 9.9 µg/m³
40
Century High School
14.9 km PM2.5: 9.6 µg/m³
34
Wilmington Pk ES (7781)
22.3 km PM2.5: 8.1 µg/m³
33
Wilmington Public Library - Outside
23.9 km PM2.5: 8.0 µg/m³
16
Wilmington Public Library - Inside
24.1 km PM2.5: 3.8 µg/m³
35
Broad Ave ES (2527)
24.1 km PM2.5: 8.3 µg/m³
39
Bonita ES (2473)
24.7 km PM2.5: 9.3 µg/m³

What cities are near Westminster?

39 Stanton 40 Garden Grove 44 Cypress 40 Fountain Valley 40 Seal Beach 45 La Palma 40 Huntington Beach 40 Anaheim 46 Buena Park 46 Cerritos

Data sources: AQI from ground-level monitoring stations via AQICN. Weather forecast from ECMWF (IFS & CAMS models). AQI calculated using US EPA standard. Updated 2026-04-09T20:21 UTC.