Air Quality in San Dimas, United States

Windy
31.1°C · 24.6% humidity
31.1°
Feels 31.1°
75
Moderate
Unusually sensitive people should consider reducing prolonged outdoor exertion.
Model forecast

Nearby Monitoring Stations

AQI Forecast
66 2pm
66
66
75 5pm
72
71
69 8pm
68
68
55 11pm
55
55
54 2am
54
54
66 5am
66
66
54 8am
66
66
66 11am
66
66
AD 728×90

Air Quality Index Trend

46h · 107 stn

San Dimas's air quality is primarily affected by vehicle emissions and industrial activity. Seasonal wildfire smoke and weather patterns can cause periodic air quality deterioration. Current PM2.5 concentration in San Dimas is 1.6× the WHO 24-hour guideline of 15 µg/m³.

24.6%
Humidity
46.3 km/h
Wind S
1011.3 hPa
Pressure
17.4
UV Extreme
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
75
23.6 µg/m³
PM10
60
73.05 µg/m³
050100150200300500

What is the weather forecast for San Dimas?

Temperature & Precipitation

PM2.5 Trend

46h · 107 stations
PM2.523.6 µg/m³ ×1.6 WHO
Moderate
PM1073.05 µg/m³
Moderate
UV INDEX17.4
Extreme
AD 300×250

What is the 7-day forecast for San Dimas?

08-03
33.1° 17.6°
08-04
28.5° 19.2°
0.13 mm
08-05
34.3° 19.9°
08-06
33.3° 16.1°
08-07
30.6° 17.8°
08-08
28.2° 15.3°
08-09
33.1° 15.2°
Both models agree Avg diff: 3.4°C

Where are air quality stations near San Dimas?

90
Glendora-Laurel, Los Angeles
5.8 km PM2.5: 30.6 µg/m³
98
Glendora-Laurel, Los Angeles
5.8 km PM2.5: 34.4 µg/m³
94
Glendora-Laurel, Los Angeles
5.8 km PM2.5: 32.5 µg/m³

What cities are near San Dimas?

69 La Verne 42 Glendora 68 Pomona 42 Covina 68 Claremont 74 Diamond Bar 30 Azusa 30 Vincent 74 Walnut 30 West Covina
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Data sources: Weather forecast from ECMWF (IFS & CAMS models). AQI calculated using US EPA standard. Updated 2026-08-08T00:54 UTC.