Air quality index66Moderate

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

Next 24 hours

US AQI

71Now
63
55
479 PM
45
43
4112 AM
39
37
353 AM
37
38
396 AM
41
43
459 AM
45
45
4512 PM
54
63
733 PM
75
77

Air quality outlook

Worst hour each day

Today71Moderate
Sat 1778Moderate
Sun 1843Good
Mon 1943Good
Tue 2041Good

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

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About Sunnyvale weather

Sunnyvale is in Santa Clara County, California, United States at 37.37°, -122.04°. Right now it’s 81° and clear; today’s high is 86° 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.