O'Fallon, Missouri Weather:
Tuesday, October 13, 2026
Cloudy Weather
Day 93°
Night 72°
Precipitation 8 %
Wind 9 mph
UV Index (0 - 11+) 4
Weather Forecast History
Last Year's Weather on This Day (October 13, 2025)
Cloudy Night

Day

82°

Night

55°

Wind

4 mph

Precipitation

14 %