Round Rock, Texas Weather:
Tuesday, September 15, 2026
Cloudy Weather
Day 100°
Night 77°
Precipitation 4 %
Wind 9 mph
UV Index (0 - 11+) 8
Weather Forecast History
Last Year's Weather on This Day (September 15, 2025)
Night

Day

93°

Night

70°

Wind

6 mph

Precipitation

8 %