Air quality index70Moderate

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

Next 24 hours

US AQI

77Now
65
54
439 PM
43
42
4112 AM
42
43
433 AM
43
42
416 AM
43
45
479 AM
47
47
4712 PM
58
69
803 PM
82
83

Air quality outlook

Worst hour each day

Today77Moderate
Sat 1784Moderate
Sun 1845Good
Mon 1945Good
Tue 2045Good

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

Live radar

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About San Ramon weather

San Ramon is in Contra Costa County, California, United States at 37.78°, -121.98°. Right now it’s 88° and clear; today’s high is 91° 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.