Air Quality in Diamond Bar, United States

Drizzle
14.1°C · 62.8% humidity
14.1°
Feels 14.1°
27
Good
Air quality is satisfactory. Enjoy outdoor activities.
Calibrated model

Nearby Monitoring Stations

AQI Forecast Calibrated
45 9pm
41
38
18 12am
40
40
40 3am
40
40
40 6am
40
40
40 9am
40
40
40 12pm
40
40
40 3pm
15
15
15 6pm
15
2
Station readings
45
41
38
18
CAMS model adj -35
75
75
75
75
75
75
75
75
75
75
75
75
75
75
75
75
75
75
75
50
50
50
50
37
AD 728×90

PM2.5 Trend (24h)

28h · 2 stations
62.8%
Humidity
45.7 km/h
Wind SSW
1010.9 hPa
Pressure
0.7
UV Low
GoodModerateUSGUnhealthyVery UnhealthyHazardous

What is the weather forecast for Diamond Bar?

Temperature & Precipitation

PM2.56.42 µg/m³ ✓ WHO
Good
PM1034.3 µg/m³
Good
UV INDEX0.7
Low
AD 300×250
Both models agree Avg diff: 4.9°C

What cities are near Diamond Bar?

24 Walnut 28 Pomona 33 Chino Hills 46 San Dimas 47 South San Jose Hills 49 La Verne 47 Covina 42 Rowland Heights 29 Claremont 35 Chino

Data sources: AQI from ground-level monitoring stations via AQICN. Weather forecast from ECMWF (IFS & CAMS models). AQI calculated using US EPA standard. Updated 2026-04-10T00:43 UTC.