Air Quality in El Cajon, United States

Clear
29.6°C · 32.1% humidity
29.6°
Feels 29.6°
45
Good
Air quality is satisfactory. Enjoy outdoor activities.
Model forecast

Nearby Monitoring Stations

AQI Forecast
34 7am
54
54
45 10am
48
49
51 1pm
52
52
53 4pm
33
33
34 7pm
34
34
34 10pm
34
34
34 1am
34
34
34 4am
34
34
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.

32.1%
Humidity
39.3 km/h
Wind WSW
1008.6 hPa
Pressure
17.4
UV Extreme
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
45
10.85 µg/m³
PM10
25
27.4 µg/m³
050100150200300500

What is the weather forecast for El Cajon?

Temperature & Precipitation

PM2.5 Trend

48h · 1 station
PM2.510.85 µg/m³ ✓ WHO
Good
PM1027.4 µg/m³
Good
UV INDEX17.4
Extreme
AD 300×250

What is the 7-day forecast for El Cajon?

07-21
29.6° 24.8°
07-22
29.8° 24.7°
07-23
29.6° 24.3°
0.06 mm
07-24
31.2° 22.4°
07-25
31.8° 23.7°
07-26
31.9° 21.7°
07-27
31.0° 23.5°
Both models agree Avg diff: 3.4°C

Where are air quality stations near El Cajon?

80
El Cajon-Redwood Avenue, San Diego, California
2.0 km PM2.5: 25.9 µg/m³
72
El Cajon-Redwood Avenue, San Diego, California
2.0 km PM2.5: 22.1 µg/m³
17
Alpine-Victoria Drive, San Diego, California
18.9 km PM2.5: 4.1 µg/m³
26
San Diego - Sherman Elementary School, San Diego, California
19.3 km PM2.5: 6.2 µg/m³
9
San Diego - Sherman Elementary School, San Diego, California
19.3 km PM2.5: 2.2 µg/m³
29
San Diego - Sherman Elementary School, San Diego, California
19.3 km PM2.5: 7.0 µg/m³
18
Otay Mesa - Donovan Correctional Facility, San Diego, California
24.1 km PM2.5: 4.3 µg/m³
18
Otay Mesa - Donovan Correctional Facility, San Diego, California
24.1 km PM2.5: 4.3 µg/m³
30
Otay Mesa - Donovan Correctional Facility, San Diego, California
24.1 km PM2.5: 7.2 µg/m³
15
Otay Mesa - Donovan Correctional Facility, San Diego, California
24.1 km PM2.5: 3.6 µg/m³

What cities are near El Cajon?

45 Bostonia 60 Casa de Oro-Mount Helix 45 Winter Gardens 40 Santee 62 Rancho San Diego 58 La Mesa 62 Spring Valley 45 Lakeside 59 Lemon Grove 62 La Presa
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Data sources: Weather forecast from ECMWF (IFS & CAMS models). AQI calculated using US EPA standard. Updated 2026-07-21T17:15 UTC.