Next 24 hours

US AQI

38Now
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35
353 AM
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356 AM
34
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339 AM
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3612 PM
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433 PM
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Air quality outlook

Worst hour each day

Today45Good
Sun 1849Good
Mon 1988Moderate
Tue 2094Moderate
Wed 2180Moderate

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

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About Round Rock weather

Round Rock is in Williamson County, Texas, United States at 30.51°, -97.68°. Right now it’s 57° and partly cloudy; today’s high is 69° with a 0% chance of rain.

Texas encompasses a vast range of climates due to its enormous size, from humid subtropical conditions along the Gulf Coast to arid desert in the west, and from semi-tropical in the Rio Grande Valley to continental on the northern plains. The state is so large that it spans multiple climate zones, with annual rainfall ranging from over 55 inches in the east to less than 10 inches in far west Texas near El Paso.