Air quality index55Moderate

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

Next 24 hours

US AQI

60Now
52
45
4310 PM
41
39
391 AM
38
37
414 AM
44
47
497 AM
51
53
5010 AM
48
45
541 PM
63
73
734 PM
74
75

Air quality outlook

Worst hour each day

Today67Moderate
Sat 1775Moderate
Sun 1841Good
Mon 1941Good
Tue 2043Good

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

Live radar

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About Union City weather

Union City is in Alameda County, California, United States at 37.60°, -122.02°. Right now it’s 78° and clear; today’s high is 87° 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.