Air Quality in Alum Rock, United States

Cloudy
12.7°C · 78.9% humidity
12.7°
Feels 12.7°
22
Good
Air quality is satisfactory. Enjoy outdoor activities.
7 stations

Nearby Monitoring Stations

AQI Forecast
34 4am
34
34
22 7am
25
21
23 10am
24
25
25 1pm
26
26
26 4pm
27
27
27 7pm
27
27
27 10pm
27
27
27 1am
27
27
AD 728×90

Air Quality Index Trend

46h · 82 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. Current PM2.5 concentration in Alum Rock is 1.0× the WHO annual guideline of 5 µg/m³.

78.9%
Humidity
4.5 km/h
Wind WSW
1016.2 hPa
Pressure
0.7
UV Low
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
22
5.21 µg/m³
PM10
19
20.55 µg/m³
050100150200300500

What is the weather forecast for Alum Rock?

Temperature & Precipitation

PM2.5 Trend

46h · 82 stations
PM2.55.21 µg/m³ ✓ WHO
Good
PM1020.55 µg/m³
Good
UV INDEX0.7
Low
AD 300×250
Station readings (7 stations within 25 km)
5.21
Median
4.27
Average
2.93
Low
6.0
High
PM2.5 µg/m³ · Model: 7.35 · Bias: +2.1

What is the 7-day forecast for Alum Rock?

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 Alum Rock?

23
Cristo Rey Jesuit High School
3.7 km PM2.5: 5.4 µg/m³
25
San Jose-Knox Avenue, Santa Clara, California
3.7 km PM2.5: 6.0 µg/m³
57
San Jose-Knox Avenue, Santa Clara, California
3.7 km PM2.5: 15.0 µg/m³
25
San Jose - Jackson St, Santa Clara, California
6.3 km PM2.5: 6.0 µg/m³
13
Cupertino City Hall
18.6 km PM2.5: 3.2 µg/m³
18
JFK Middle School
20.7 km PM2.5: 4.2 µg/m³
12
Environment Education Center
21.7 km PM2.5: 2.9 µg/m³
13
N Foothhill Blvd
21.9 km PM2.5: 3.1 µg/m³
16
Acterra!
25.5 km PM2.5: 3.9 µg/m³

What cities are near Alum Rock?

24 San Jose 20 Milpitas 19 Santa Clara 18 Campbell 15 Sunnyvale 14 Cupertino 17 Los Gatos 15 Saratoga 15 Mountain View 15 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 2026-05-29T14:40 UTC.