Air Quality in Cupertino, United States

Partly Cloudy
18.3°C · 58.4% humidity
18.3°
Feels 18.3°
28
Good
Air quality is satisfactory. Enjoy outdoor activities.
8 stations

Nearby Monitoring Stations

AQI Forecast Calibrated
20 3pm
20
20
19 6pm
6
6
6 9pm
19
19
6 12am
19
19
19 3am
19
19
31 6am
44
44
69 9am
69
69
44 12pm
19
31
Station readings
20
20
20
CAMS model adj -6
25
25
25
25
12
12
12
25
25
12
25
25
25
25
25
37
50
50
75
75
75
50
25
37
AD 728×90

PM2.5 Trend (24h)

25h · 65 stations
58.4%
Humidity
25.2 km/h
Wind S
1011.3 hPa
Pressure
2.9
UV Moderate
GoodModerateUSGUnhealthyVery UnhealthyHazardous

What is the weather forecast for Cupertino?

Temperature & Precipitation

PM2.56.62 µg/m³ ✓ WHO
Good
PM1027.45 µg/m³
Good
UV INDEX2.9
Moderate
AD 300×250
Station readings (8 stations within 25 km)
6.62
Median
6.88
Average
4.8
Low
9.73
High
PM2.5 µg/m³ · Model: 5.9 · Bias: -0.7

What is the 7-day forecast for Cupertino?

04-09
21.8° 15.0°
0.94 mm
04-10
18.7° 12.1°
2.94 mm
04-11
19.3° 11.5°
0.06 mm
04-12
13.2° 9.0°
6.75 mm
04-13
14.8° 7.6°
0.25 mm
04-14
17.7° 8.3°
04-15
20.5° 11.0°
Both models agree Avg diff: 2.1°C

Where are air quality stations near Cupertino?

26
Cupertino City Hall
0.6 km PM2.5: 6.3 µg/m³
38
JFK Middle School
2.1 km PM2.5: 9.2 µg/m³
23
Environment Education Center
2.9 km PM2.5: 5.5 µg/m³
28
N Foothhill Blvd
3.2 km PM2.5: 6.7 µg/m³
28
San Jose - Jackson St, Santa Clara, California
12.5 km
38
San Jose - Jackson St, Santa Clara, California
12.5 km
28
Acterra!
13.7 km PM2.5: 6.8 µg/m³
43
Cristo Rey Jesuit High School
15.2 km PM2.5: 10.4 µg/m³
30
San Jose-Knox Avenue, Santa Clara, California
16.2 km
33
San Jose-Knox Avenue, Santa Clara, California
16.2 km

What cities are near Cupertino?

28 Sunnyvale 25 Saratoga 28 Santa Clara 28 Campbell 28 Mountain View 28 Los Altos 25 Los Gatos 29 San Jose 28 Milpitas 27 Palo Alto

Data sources: AQI from ground-level monitoring stations via AQICN. Weather forecast from ECMWF (IFS & CAMS models). AQI calculated using US EPA standard. Updated 2026-04-09T18:40 UTC.