O'Fallon, Missouri Weather:
Thursday, October 1, 2026
Cloudy Weather
Day 75°
Night 55°
Precipitation 1 %
Wind 6 mph
UV Index (0 - 11+) 5
Weather Forecast History
Last Year's Weather on This Day (October 1, 2025)
Cloudy Weather

Day

86°

Night

57°

Wind

5 mph

UV Index

50

Precipitation

0 %