Air Quality in El Cajon, United States
Windy
28.4°C · 38.1% humidity
28.4°
Feels 28.4°
45
Good
Air quality is satisfactory. Enjoy outdoor activities.
3 stations
Nearby Monitoring Stations
AQI Forecast
54
4pm
54
34
45
7pm
42
40
38
10pm
37
56
35
1am
35
28
28
4am
27
27
27
7am
54
54
54
10am
54
54
54
1pm
54
54
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.
38.1%
Humidity
53.1 km/h
Wind W
1009.2 hPa
Pressure
0.7
UV Low
GoodModerateUSGUnhealthyVery UnhealthyHazardous
Which pollutant is driving the AQI?
PM2.5▲
10.71 µg/m³
PM10
20.55 µg/m³
050100150200300500
What is the weather forecast for El Cajon?
Temperature & Precipitation
PM2.5 Trend
48h · 1 stationPM2.510.71 µg/m³
✓ WHO
Good
PM1020.55 µg/m³
Good
UV INDEX0.7
Low
Station readings (3 stations within 25 km)
10.71
Median
11.0
Average
9.6
Low
13.1
High
PM2.5 µg/m³ · Model: 7.1 · Bias: -3.6
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?
22
El Cajon-Redwood Avenue, San Diego, California
50
El Cajon-Redwood Avenue, San Diego, California
50
Alpine-Victoria Drive, San Diego, California
34
San Diego - Sherman Elementary School, San Diego, California
82
San Diego - Sherman Elementary School, San Diego, California
30
San Diego - Sherman Elementary School, San Diego, California
43
Otay Mesa - Donovan Correctional Facility, San Diego, California
43
Otay Mesa - Donovan Correctional Facility, San Diego, California
32
Otay Mesa - Donovan Correctional Facility, San Diego, California
33
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 2026-06-09T02:33 UTC.