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
AD 728×90

Air Quality Index Trend

48h · 1 stn

El 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▲
34
8.21 µg/m³
PM10
19
20.55 µg/m³
050100150200300500

What is the weather forecast for El Cajon?

Temperature & Precipitation

PM2.5 Trend

48h · 1 station
PM2.58.21 µg/m³ ✓ WHO
Good
PM1020.55 µg/m³
Good
UV INDEX0.7
Low
AD 300×250
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
2.0 km PM2.5: 8.9 µg/m³
43
El Cajon-Redwood Avenue, San Diego, California
2.0 km PM2.5: 10.3 µg/m³
53
Alpine-Victoria Drive, San Diego, California
18.9 km PM2.5: 13.1 µg/m³
34
San Diego - Sherman Elementary School, San Diego, California
19.3 km PM2.5: 8.2 µg/m³
50
San Diego - Sherman Elementary School, San Diego, California
19.3 km PM2.5: 12.0 µg/m³
4
San Diego - Sherman Elementary School, San Diego, California
19.3 km PM2.5: 1.0 µg/m³
33
Otay Mesa - Donovan Correctional Facility, San Diego, California
24.1 km PM2.5: 7.9 µg/m³
53
Otay Mesa - Donovan Correctional Facility, San Diego, California
24.1 km PM2.5: 13.1 µg/m³
43
Otay Mesa - Donovan Correctional Facility, San Diego, California
24.1 km PM2.5: 10.3 µg/m³
43
Otay Mesa - Donovan Correctional Facility, San Diego, California
24.1 km PM2.5: 10.3 µg/m³

What cities are near El Cajon?

34 Bostonia 34 Casa de Oro-Mount Helix 35 Winter Gardens 34 Santee 34 Rancho San Diego 33 La Mesa 33 Spring Valley 35 Lakeside 33 Lemon Grove 32 La Presa
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 2026-06-09T05:37 UTC.