UV Index Today in Williamson County, Texas (TX)
Wednesday, July 15, 2026 -11:56 AM CDT (GMT-5)
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The average maximum UV Index today across 19 locations in Williamson County, Texas (TX), is 7.1. The highest projected maximum is 10 in Sonterra at 1:00 PM CDT, while the lowest projected maximum is 1.5 in Austin at 12:00 PM CDT.
Tomorrow, the average maximum UV Index across those same locations is expected to be 2. The highest projected maximum is 2.9 in Thorndale at 2:00 PM CDT, and the lowest projected maximum is 1.4 in Austin at 1:00 PM CDT.
19 Places in Williamson County, Texas (TX)
Maximum UV Index Today