Air Quality in San Jose, United States
Windy
21.7°C · 44.3% humidity
21.7°
Feels 21.7°
26
Good
Air quality is satisfactory. Enjoy outdoor activities.
Model forecast
Nearby Monitoring Stations
San Jose's air quality — share it
AQI Forecast
25
2pm
27
27
26
5pm
34
34
54
8pm
54
54
54
11pm
54
54
54
2am
54
34
34
5am
34
34
34
8am
27
27
27
11am
27
27
Air Quality Index Trend
46h · 1 stnSan Jose'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 Jose is 1.2× the WHO annual guideline of 5 µg/m³.
44.3%
Humidity
63.1 km/h
Wind NW
1017.4 hPa
Pressure
6.9
UV High
GoodModerateUSGUnhealthyVery UnhealthyHazardous
Which pollutant is driving the AQI?
PM2.5▲
6.25 µg/m³
PM10
13.7 µg/m³
050100150200300500
What is the weather forecast for San Jose?
Temperature & Precipitation
PM2.5 Trend
46h · 1 stationPM2.56.25 µg/m³
✓ WHO
Good
PM1013.7 µg/m³
Good
UV INDEX6.9
High
What is the 7-day forecast for San Jose?
05-29
22.7° 12.7°
05-30
22.0° 15.0°
05-31
28.4° 18.6°
06-01
28.1° 14.0°
06-02
23.5° 13.9°
06-03
28.3° 10.5°
06-04
28.6° 11.7°
Both models agree
Avg diff: 3.5°C
Where are air quality stations near San Jose?
33
San Jose - Jackson St, Santa Clara, California
16
Cristo Rey Jesuit High School
28
San Jose-Knox Avenue, Santa Clara, California
41
San Jose-Knox Avenue, Santa Clara, California
14
Cupertino City Hall
17
JFK Middle School
13
Environment Education Center
14
N Foothhill Blvd
15
Acterra!
12
Berkeley-Palo Alto
What cities are near San Jose?
Get AQI alerts for San Jose
Notify me when air quality reaches:
Free · No account · Unsubscribe any time
Data sources: Weather forecast from ECMWF (IFS & CAMS models). AQI calculated using US EPA standard. Updated 2026-05-29T00:27 UTC.