Air quality index61Moderate

Acceptable for most people; unusually sensitive people should take it easier outdoors.

Next 24 hours

US AQI

67Now
61
56
5211 PM
47
44
422 AM
39
39
395 AM
39
41
438 AM
45
48
5211 AM
55
61
672 PM
73
74
755 PM
77
60

Air quality outlook

Worst hour each day

Today80Moderate
Sat 1777Moderate
Sun 1845Good
Mon 1943Good
Tue 2041Good

From our air-quality forecast models (GEOS-CF / GEFS aerosols). AQI uses the US EPA scale.

Live radar

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About Cupertino weather

Cupertino is in Santa Clara County, California, United States at 37.32°, -122.03°. Right now it’s 74° and clear; today’s high is 90° with a 0% chance of rain.

California encompasses an extraordinary range of climates, from the Mediterranean coast to alpine peaks, scorching deserts, and temperate rainforests. The state's Central Valley is one of the most productive agricultural regions in the world, benefiting from warm, dry summers and mild, wet winters. Death Valley holds the record for the highest reliably recorded air temperature on Earth at 134 degrees Fahrenheit.