St. Charles, Missouri Weather:
Monday, October 19, 2026
Partly Sunny with Showers
Day 70°
Night 54°
Precipitation 55 %
Wind 4 mph
UV Index (0 - 11+) 2
Weather Forecast History
Last Year's Weather on This Day (October 19, 2025)
Night

Day

63°

Night

45°

Wind

6 mph

Precipitation

0 %