Air Quality in El Cajon, United States

Partly Cloudy
20.4°C · 64.3% humidity
20.4°
Feels 20.4°
32
Good
Air quality is satisfactory. Enjoy outdoor activities.
6 stations

Nearby Monitoring Stations

AQI Forecast
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Air Quality Index Trend

46h · 7 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.

64.3%
Humidity
20.2 km/h
Wind SW
1013.6 hPa
Pressure
0.0
UV Low
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
32
7.75 µg/m³
PM10
13
13.7 µg/m³
050100150200300500

What is the weather forecast for El Cajon?

Temperature & Precipitation

PM2.5 Trend

46h · 7 stations
PM2.57.75 µg/m³ ✓ WHO
Good
PM1013.7 µg/m³
Good
UV INDEX0.0
Low
Station readings (6 stations within 25 km)
7.75
Median
8.8
Average
6.03
Low
12.0
High
PM2.5 µg/m³ · Model: 6.0 · Bias: -1.8

What is the 7-day forecast for El Cajon?

10-21
26.0° 20.4°
10-22
31.7° 20.6°
10-23
23.8° 21.1°
10-24
24.9° 18.4°
0.25 mm
10-25
29.9° 17.6°
10-26
28.4° 20.8°
0.13 mm
10-27
24.9° 20.8°
Both models agree Avg diff: 5.3°C

Where are air quality stations near El Cajon?

32
El Cajon-Redwood Avenue, San Diego, California
2.0 km PM2.5: 7.7 µg/m³
50
Alpine-Victoria Drive, San Diego, California
18.9 km PM2.5: 12.0 µg/m³
57
Alpine-Victoria Drive, San Diego, California
18.9 km PM2.5: 15.0 µg/m³
38
Alpine-Victoria Drive, San Diego, California
18.9 km PM2.5: 9.1 µg/m³
44
Alpine-Victoria Drive, San Diego, California
18.9 km PM2.5: 10.6 µg/m³
25
Southwest Chula Vista
19.3 km PM2.5: 5.9 µg/m³
31
San Diego - Sherman Elementary School, San Diego, California
19.3 km PM2.5: 7.4 µg/m³
50
Otay Mesa - Donovan Correctional Facility, San Diego, California
24.1 km PM2.5: 12.0 µg/m³
20
Ocean View Hills
25.4 km PM2.5: 4.9 µg/m³

What cities are near El Cajon?

32 Bostonia 32 Casa de Oro-Mount Helix 33 Winter Gardens 32 Santee 32 Rancho San Diego 30 La Mesa 31 Spring Valley 35 Lakeside 29 Lemon Grove 30 La Presa
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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 2026-10-21T03:58 UTC.