St. Louis, Missouri Weather:
Tuesday, July 21, 2026
Sunny with a Chance of Thunderstorms
Day 90°
Night 70°
Precipitation 68 %
Wind 5 mph
UV Index (0 - 11+) 7
Weather Forecast History
Last Year's Weather on This Day (July 21, 2025)
Cloudy Night

Day

88°

Night

75°

Wind

5 mph

Precipitation

5 %