Air Quality in El Cajon, United States
Partly Cloudy
17.6°C · 64.9% humidity
17.6°
Feels 17.6°
28
Good
Air quality is satisfactory. Enjoy outdoor activities.
3 stations
Nearby Monitoring Stations
AQI Forecast
25
4am
25
27
28
7am
27
27
27
10am
27
34
34
1pm
34
34
34
4pm
34
27
27
7pm
27
27
27
10pm
27
25
25
1am
25
25
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. Current PM2.5 concentration in El Cajon is 1.3× the WHO annual guideline of 5 µg/m³.
64.9%
Humidity
14.2 km/h
Wind SW
1011.4 hPa
Pressure
1.4
UV Low
GoodModerateUSGUnhealthyVery UnhealthyHazardous
Which pollutant is driving the AQI?
PM2.5▲
6.64 µg/m³
PM10
13.7 µg/m³
050100150200300500
What is the weather forecast for El Cajon?
Temperature & Precipitation
PM2.5 Trend
48h · 1 stationPM2.56.64 µg/m³
✓ WHO
Good
PM1013.7 µg/m³
Good
UV INDEX1.4
Low
Station readings (3 stations within 25 km)
6.64
Median
6.4
Average
4.6
Low
8.4
High
PM2.5 µg/m³ · Model: 6.25 · Bias: -0.4
What is the 7-day forecast for El Cajon?
05-29
28.7° 17.6°
05-30
22.1° 16.3°
05-31
25.9° 19.2°
06-01
28.4° 17.6°
06-02
29.6° 15.6°
06-03
26.2° 14.9°
06-04
25.3° 16.6°
Both models agree
Avg diff: 2.8°C
Where are air quality stations near El Cajon?
55
El Cajon-Redwood Avenue, San Diego, California
50
El Cajon-Redwood Avenue, San Diego, California
13
Alpine-Victoria Drive, San Diego, California
21
San Diego - Sherman Elementary School, San Diego, California
5
San Diego - Sherman Elementary School, San Diego, California
25
San Diego - Sherman Elementary School, San Diego, California
17
Otay Mesa - Donovan Correctional Facility, San Diego, California
17
Otay Mesa - Donovan Correctional Facility, San Diego, California
34
Otay Mesa - Donovan Correctional Facility, San Diego, California
26
Otay Mesa - Donovan Correctional Facility, San Diego, California
What cities are near El Cajon?
Get AQI alerts for El Cajon
Notify me when air quality reaches:
Free · No account · Unsubscribe any time
Data sources: AQI from ground-level monitoring stations via AQICN. Weather forecast from ECMWF (IFS & CAMS models). AQI calculated using US EPA standard. Updated 2026-05-29T14:36 UTC.