Round Rock, Texas Weather:
Monday, May 18, 2026
Sunny with a Chance of Thunderstorms
Day 91°
Night 77°
Precipitation 55 %
Wind 14 mph
UV Index (0 - 11+) 6
Weather Forecast History
Last Year's Weather on This Day (May 18, 2025)
Cloudy Weather

Day

90°

Night

77°

Wind

14 mph

UV Index

9

Precipitation

25 %