St. Peters, Missouri Weather:
Sunday, October 18, 2026
Cloudy Weather
Day 66°
Night 48°
Precipitation 8 %
Wind 7 mph
UV Index (0 - 11+) 4
Weather Forecast History
Last Year's Weather on This Day (October 18, 2025)
Stormy Weather

Day

73°

Night

52°

Wind

9 mph

UV Index

10

Precipitation

99 %