Air Quality in San Diego, United States

Windy
23.6°C · 61.8% humidity
23.6°
Feels 23.6°
57
Moderate
Unusually sensitive people should consider reducing prolonged outdoor exertion.
4 stations

Nearby Monitoring Stations

AQI Forecast
54 7am
54
54
57 10am
54
54
54 1pm
54
54
34 4pm
34
34
34 7pm
34
34
34 10pm
34
34
34 1am
34
34
34 4am
34
54
AD 728×90

Air Quality Index Trend

48h · 1 stn

San Diego'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 San Diego is 1.0× the WHO 24-hour guideline of 15 µg/m³.

61.8%
Humidity
42.5 km/h
Wind W
1009.0 hPa
Pressure
14.9
UV Extreme
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
57
15.04 µg/m³
PM10
25
27.4 µg/m³
050100150200300500

What is the weather forecast for San Diego?

Temperature & Precipitation

PM2.5 Trend

48h · 1 station
PM2.515.04 µg/m³ ✓ WHO
Moderate
PM1027.4 µg/m³
Good
UV INDEX14.9
Extreme
AD 300×250
Station readings (4 stations within 25 km)
15.04
Median
15.43
Average
9.7
Low
18.85
High
PM2.5 µg/m³ · Model: 10.0 · Bias: -5.0

What is the 7-day forecast for San Diego?

07-21
24.1° 21.5°
07-22
22.8° 21.2°
07-23
23.0° 21.1°
0.13 mm
07-24
24.7° 20.8°
07-25
24.5° 21.1°
07-26
24.1° 20.1°
07-27
23.6° 21.7°
Both models agree Avg diff: 1.9°C

Where are air quality stations near San Diego?

9
San Diego - Sherman Elementary School, San Diego, California
2.2 km PM2.5: 2.2 µg/m³
29
San Diego - Sherman Elementary School, San Diego, California
2.2 km PM2.5: 7.0 µg/m³
26
San Diego - Sherman Elementary School, San Diego, California
2.2 km PM2.5: 6.2 µg/m³
40
CRSF (EHS Bldg)
18.8 km PM2.5: 9.7 µg/m³
63
Smythe Avenue
20.0 km PM2.5: 17.6 µg/m³
58
Ocean View Hills
20.7 km PM2.5: 15.6 µg/m³
72
El Cajon-Redwood Avenue, San Diego, California
22.4 km PM2.5: 22.1 µg/m³
80
El Cajon-Redwood Avenue, San Diego, California
22.4 km PM2.5: 25.9 µg/m³
65
International Border
22.6 km PM2.5: 18.9 µg/m³
30
Otay Mesa - Donovan Correctional Facility, San Diego, California
26.7 km PM2.5: 7.2 µg/m³

What cities are near San Diego?

58 Coronado 62 National City 62 Chula Vista 59 Lemon Grove 58 La Mesa 62 Imperial Beach 62 La Presa 62 Spring Valley 40 La Jolla 60 Casa de Oro-Mount Helix
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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 2026-07-21T17:16 UTC.