Air Quality in Alum Rock, United States

Partly Cloudy
27.1°C · 51.8% humidity
27.1°
Feels 29.2°
22
Good
Air quality is satisfactory. Enjoy outdoor activities.
6 stations

Nearby Monitoring Stations

AQI Forecast
34 6am
54
34
22 9am
18
21
23 12pm
24
25
25 3pm
26
26
26 6pm
27
27
27 9pm
34
34
34 12am
34
34
34 3am
34
34
AD 728×90

Air Quality Index Trend

45h · 83 stn

Alum Rock's air quality is primarily affected by vehicle emissions and industrial activity. Seasonal wildfire smoke and weather patterns can cause periodic air quality deterioration.

51.8%
Humidity
27.7 km/h
Wind WNW
1016.2 hPa
Pressure
4.4
UV Moderate
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
22
5.34 µg/m³
PM10
13
13.7 µg/m³
050100150200300500

What is the weather forecast for Alum Rock?

Temperature & Precipitation

PM2.5 Trend

45h · 83 stations
PM2.55.34 µg/m³ ✓ WHO
Good
PM1013.7 µg/m³
Good
UV INDEX4.4
Moderate
AD 300×250
Station readings (6 stations within 25 km)
5.34
Median
4.46
Average
3.52
Low
5.92
High
PM2.5 µg/m³ · Model: 7.35 · Bias: +2.0

What is the 7-day forecast for Alum Rock?

09-05
31.5° 17.2°
09-06
31.6° 18.6°
09-07
34.4° 15.7°
09-08
32.8° 16.2°
09-09
30.5° 18.5°
09-10
28.9° 16.2°
09-11
27.4° 19.0°
Both models agree Avg diff: 3.9°C

Where are air quality stations near Alum Rock?

25
Cristo Rey Jesuit High School
3.7 km PM2.5: 5.9 µg/m³
17
San Jose - Jackson St, Santa Clara, California
6.3 km PM2.5: 4.1 µg/m³
34
San Jose - Jackson St, Santa Clara, California
6.3 km PM2.5: 8.2 µg/m³
26
Andrew Hill High School
8.3 km PM2.5: 6.3 µg/m³
16
Cupertino City Hall
18.6 km PM2.5: 3.9 µg/m³
22
JFK Middle School
20.7 km PM2.5: 5.3 µg/m³
15
Environment Education Center
21.7 km PM2.5: 3.5 µg/m³
17
N Foothhill Blvd
21.9 km PM2.5: 4.1 µg/m³
22
Acterra!
25.5 km PM2.5: 5.2 µg/m³

What cities are near Alum Rock?

18 San Jose 19 Milpitas 18 Santa Clara 19 Campbell 18 Sunnyvale 17 Cupertino 18 Los Gatos 18 Saratoga 18 Mountain View 18 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 2026-09-05T16:37 UTC.