UV Index Today in Williamson County, Texas (TX)
Tuesday, April 7, 2026 - 3:46 AM CDT (GMT-5)
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The average maximum UV Index today across 19 locations in Williamson County, Texas (TX), is 8.1. The highest projected maximum is 8.7 in Austin at 2:00 PM CDT, while the lowest projected maximum is 7.6 in Sonterra at 12:00 PM CDT.
Tomorrow, the average maximum UV Index across those same locations is expected to be 7.4. The highest projected maximum is 8 in Round Rock at 2:00 PM CDT, and the lowest projected maximum is 6.8 in Georgetown at 2:00 PM CDT.
19 Places in Williamson County, Texas (TX)
Maximum UV Index Today