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US AQI

40Now
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407 AM
43
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4510 AM
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481 PM
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564 PM
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527 PM
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4710 PM
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561 AM
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Air quality outlook

Worst hour each day

Today57Moderate
Mon 1971Moderate
Tue 2067Moderate
Wed 2167Moderate
Thu 2231Good

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

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About Diamond Bar weather

Diamond Bar is in Los Angeles County, California, United States at 34.03°, -117.81°. Right now it’s 67° and mostly clear; today’s high is 86° with a 1% 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.