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
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.

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▲
45
10.71 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
PM2.510.71 µg/m³ ✓ WHO
Good
PM1020.55 µg/m³
Good
UV INDEX0.7
Low
AD 300×250
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
2.0 km PM2.5: 5.3 µg/m³
50
El Cajon-Redwood Avenue, San Diego, California
2.0 km PM2.5: 12.0 µg/m³
50
Alpine-Victoria Drive, San Diego, California
18.9 km PM2.5: 12.0 µg/m³
34
San Diego - Sherman Elementary School, San Diego, California
19.3 km PM2.5: 8.2 µg/m³
82
San Diego - Sherman Elementary School, San Diego, California
19.3 km PM2.5: 26.8 µg/m³
30
San Diego - Sherman Elementary School, San Diego, California
19.3 km PM2.5: 7.2 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
32
Otay Mesa - Donovan Correctional Facility, San Diego, California
24.1 km PM2.5: 7.7 µg/m³
33
Otay Mesa - Donovan Correctional Facility, San Diego, California
24.1 km PM2.5: 7.9 µg/m³

What cities are near El Cajon?

42 Bostonia 40 Casa de Oro-Mount Helix 42 Winter Gardens 38 Santee 39 Rancho San Diego 36 La Mesa 38 Spring Valley 43 Lakeside 36 Lemon Grove 37 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 2026-06-09T02:33 UTC.