UV Index Today in Williamson County, Texas (TX)
Friday, May 22, 2026 -1:38 PMCDT (GMT-5)
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The average maximum UV Index today across 19 locations in Williamson County, Texas (TX), is 9. The highest projected maximum is 9.1 in Austin at 1:00 PM CDT, while the lowest projected maximum is 8.9 in Thorndale at 2:00 PM CDT.
Tomorrow, the average maximum UV Index across those same locations is expected to be 7.1. The highest projected maximum is 8.6 in Thorndale at 1:00 PM CDT, and the lowest projected maximum is 5.3 in Georgetown at 11:00 AM CDT.
19 Places in Williamson County, Texas (TX)
Maximum UV Index Today