St. Peters, Missouri Weather:
Monday, September 28, 2026
Sunny Weather
Day 82°
Night 59°
Precipitation 0 %
Wind 4 mph
Weather Forecast History
Last Year's Weather on This Day (September 28, 2025)
Cloudy Weather

Day

88°

Night

52°

Wind

4 mph

UV Index

50

Precipitation

1 %