St. Louis, Missouri Weather:
Tuesday, August 18, 2026
Sunny Weather
Day 88°
Night 70°
Precipitation 10 %
Wind 7 mph
UV Index (0 - 11+) 9
Weather Forecast History
Last Year's Weather on This Day (August 18, 2025)
Stormy Weather

Day

100°

Night

75°

Wind

5 mph

Precipitation

80 %