Air Quality in San Jose, United States

Clear
29.2°C · 24.1% humidity
29.2°
Feels 29.2°
28
Good
Air quality is satisfactory. Enjoy outdoor activities.
6 stations

Nearby Monitoring Stations

AQI Forecast
27 7am
27
27
28 10am
27
27
27 1pm
27
27
34 4pm
34
34
34 7pm
34
34
34 10pm
34
34
34 1am
34
34
34 4am
34
34
AD 728×90

Air Quality Index Trend

45h · 78 stn

San 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.

24.1%
Humidity
24.6 km/h
Wind NW
1008.6 hPa
Pressure
12.9
UV Extreme
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
28
6.57 µg/m³
PM10
19
20.55 µg/m³
050100150200300500

What is the weather forecast for San Jose?

Temperature & Precipitation

PM2.5 Trend

45h · 78 stations
PM2.56.57 µg/m³ ✓ WHO
Good
PM1020.55 µg/m³
Good
UV INDEX12.9
Extreme
AD 300×250
Station readings (6 stations within 25 km)
6.57
Median
5.88
Average
4.23
Low
7.51
High
PM2.5 µg/m³ · Model: 10.0 · Bias: +3.4

What is the 7-day forecast for San Jose?

07-21
29.2° 15.5°
07-22
31.9° 18.2°
07-23
28.5° 22.7°
07-24
35.3° 16.8°
07-25
27.6° 19.5°
07-26
34.8° 14.8°
07-27
31.6° 17.8°
Both models agree Avg diff: 4.9°C

Where are air quality stations near San Jose?

35
San Jose - Jackson St, Santa Clara, California
1.0 km PM2.5: 8.4 µg/m³
28
Cristo Rey Jesuit High School
3.0 km PM2.5: 6.8 µg/m³
57
San Jose-Knox Avenue, Santa Clara, California
4.0 km PM2.5: 15.0 µg/m³
25
San Jose-Knox Avenue, Santa Clara, California
4.0 km PM2.5: 6.0 µg/m³
22
Cupertino City Hall
12.0 km PM2.5: 5.3 µg/m³
31
JFK Middle School
14.1 km PM2.5: 7.5 µg/m³
18
Environment Education Center
15.2 km PM2.5: 4.2 µg/m³
24
N Foothhill Blvd
15.4 km PM2.5: 5.7 µg/m³
24
Acterra!
21.1 km PM2.5: 5.8 µg/m³
17
Berkeley-Palo Alto
25.7 km PM2.5: 4.1 µg/m³

What cities are near San Jose?

25 Santa Clara 28 Alum Rock 24 Campbell 25 Milpitas 23 Cupertino 23 Sunnyvale 24 Saratoga 23 Los Gatos 23 Mountain View 23 Los Altos
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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 2026-07-21T17:15 UTC.