Air Quality in San Dimas, United States

Windy
30.1°C · 16.7% humidity
30.1°
Feels 30.1°
53
Moderate
Unusually sensitive people should consider reducing prolonged outdoor exertion.
1 station

Nearby Monitoring Stations

AQI Forecast
54 2pm
54
54
53 5pm
34
34
54 8pm
54
54
54 11pm
54
54
54 2am
54
54
54 5am
54
54
54 8am
54
54
54 11am
54
54
AD 728×90

Air Quality Index Trend

48h · 2 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 2.6× the WHO annual guideline of 5 µg/m³.

16.7%
Humidity
47.4 km/h
Wind SSW
1011.5 hPa
Pressure
5.9
UV High
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
53
13.1 µg/m³
PM10
31
34.3 µg/m³
050100150200300500

What is the weather forecast for San Dimas?

Temperature & Precipitation

PM2.5 Trend

48h · 2 stations
PM2.513.1 µg/m³ ✓ WHO
Moderate
PM1034.3 µg/m³
Good
UV INDEX5.9
High
AD 300×250
Station readings (1 station within 25 km)
13.1
Median
13.1
Average
13.1
Low
13.1
High
PM2.5 µg/m³ · Model: 13.5 · Bias: +0.4

What is the 7-day forecast for San Dimas?

05-29
30.1° 14.6°
05-30
19.6° 8.8°
05-31
27.6° 16.6°
06-01
29.9° 11.8°
06-02
28.3° 10.6°
06-03
27.2° 7.2°
06-04
24.2° 12.2°
Both models agree Avg diff: 3.4°C

Where are air quality stations near San Dimas?

38
Glendora-Laurel, Los Angeles
5.8 km PM2.5: 9.1 µg/m³
43
Glendora-Laurel, Los Angeles
5.8 km PM2.5: 10.3 µg/m³
10
Glendora-Laurel, Los Angeles
5.8 km PM2.5: 2.4 µg/m³
31
Glendora-Laurel, Los Angeles
5.8 km PM2.5: 7.4 µg/m³
48
Glendora-Laurel, Los Angeles
5.8 km PM2.5: 11.5 µg/m³

What cities are near San Dimas?

53 La Verne 53 Glendora 53 Pomona 49 Covina 53 Claremont 53 Diamond Bar 48 Azusa 40 Vincent 53 Walnut 33 West Covina
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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 2026-05-29T00:17 UTC.