Air Quality in El Cajon, United States
Partly Cloudy
21.4°C · 61.1% humidity
21.4°
Feels 21.4°
34
Good
Air quality is satisfactory. Enjoy outdoor activities.
4 stations
Nearby Monitoring Stations
AQI Forecast
34
7pm
34
34
34
10pm
34
54
34
1am
34
27
27
4am
27
27
27
7am
54
54
54
10am
54
54
54
1pm
54
54
54
4pm
34
27
Air Quality Index Trend
48h · 1 stnEl Cajon's air quality is primarily affected by vehicle emissions and industrial activity. Seasonal wildfire smoke and weather patterns can cause periodic air quality deterioration.
61.1%
Humidity
28.2 km/h
Wind SW
1010.6 hPa
Pressure
0.7
UV Low
GoodModerateUSGUnhealthyVery UnhealthyHazardous
Which pollutant is driving the AQI?
PM2.5▲
8.21 µg/m³
PM10
20.55 µg/m³
050100150200300500
What is the weather forecast for El Cajon?
Temperature & Precipitation
PM2.5 Trend
48h · 1 stationPM2.58.21 µg/m³
✓ WHO
Good
PM1020.55 µg/m³
Good
UV INDEX0.7
Low
Station readings (4 stations within 25 km)
8.21
Median
8.35
Average
7.2
Low
9.1
High
PM2.5 µg/m³ · Model: 7.1 · Bias: -1.1
What is the 7-day forecast for El Cajon?
06-09
28.4° 17.8°
06-10
27.2° 17.8°
06-11
25.1° 18.7°
06-12
26.6° 18.7°
06-13
32.8° 19.7°
06-14
27.3° 22.4°
06-15
26.0° 16.0°
0.25 mm
Both models agree
Avg diff: 2.6°C
Where are air quality stations near El Cajon?
37
El Cajon-Redwood Avenue, San Diego, California
43
El Cajon-Redwood Avenue, San Diego, California
53
Alpine-Victoria Drive, San Diego, California
34
San Diego - Sherman Elementary School, San Diego, California
50
San Diego - Sherman Elementary School, San Diego, California
4
San Diego - Sherman Elementary School, San Diego, California
33
Otay Mesa - Donovan Correctional Facility, San Diego, California
53
Otay Mesa - Donovan Correctional Facility, San Diego, California
43
Otay Mesa - Donovan Correctional Facility, San Diego, California
43
Otay Mesa - Donovan Correctional Facility, San Diego, California
What cities are near El Cajon?
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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 2026-06-09T05:37 UTC.