Air Quality in Cupertino, United States

Clear
24.9°C · 36.1% humidity
24.9°
Feels 24.9°
64
Moderate
Unusually sensitive people should consider reducing prolonged outdoor exertion.
Model forecast

Nearby Monitoring Stations

AQI Forecast
34 3pm
34
54
64 6pm
61
59
58 9pm
57
56
55 12am
55
55
54 3am
54
54
54 6am
54
54
54 9am
34
34
34 12pm
34
34
AD 728×90

Air Quality Index Trend

45h · 66 stn

Cupertino'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 Cupertino is 1.2× the WHO 24-hour guideline of 15 µg/m³.

36.1%
Humidity
20.6 km/h
Wind WNW
1010.9 hPa
Pressure
17.4
UV Extreme
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
64
18.1 µg/m³
PM10
56
66.15 µg/m³
050100150200300500

What is the weather forecast for Cupertino?

Temperature & Precipitation

PM2.5 Trend

45h · 66 stations
PM2.518.1 µg/m³ ×1.2 WHO
Moderate
PM1066.15 µg/m³
Moderate
UV INDEX17.4
Extreme
AD 300×250

What is the 7-day forecast for Cupertino?

08-03
28.5° 15.9°
08-04
28.0° 18.9°
08-05
28.2° 15.2°
08-06
29.4° 16.2°
08-07
25.6° 19.1°
08-08
28.2° 15.9°
08-09
29.5° 16.1°
Both models agree Avg diff: 1.9°C

Where are air quality stations near Cupertino?

35
Cupertino City Hall
0.6 km PM2.5: 8.4 µg/m³
51
JFK Middle School
2.1 km PM2.5: 12.1 µg/m³
34
Environment Education Center
2.9 km PM2.5: 8.1 µg/m³
37
N Foothhill Blvd
3.2 km PM2.5: 8.8 µg/m³
55
San Jose - Jackson St, Santa Clara, California
12.5 km PM2.5: 14.0 µg/m³
50
San Jose - Jackson St, Santa Clara, California
12.5 km PM2.5: 12.0 µg/m³
33
Acterra!
13.7 km PM2.5: 7.9 µg/m³
44
Cristo Rey Jesuit High School
15.2 km PM2.5: 10.6 µg/m³
53
San Jose-Knox Avenue, Santa Clara, California
16.2 km PM2.5: 13.1 µg/m³
46
San Jose-Knox Avenue, Santa Clara, California
16.2 km PM2.5: 11.0 µg/m³

What cities are near Cupertino?

64 Sunnyvale 63 Saratoga 64 Santa Clara 63 Campbell 64 Mountain View 63 Los Altos 63 Los Gatos 63 San Jose 69 Milpitas 68 Palo Alto
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Data sources: Weather forecast from ECMWF (IFS & CAMS models). AQI calculated using US EPA standard. Updated 2026-08-08T01:01 UTC.