St. Peters, Missouri Weather:
Tuesday, September 29, 2026
Cloudy Weather
Day 79°
Night 54°
Precipitation 6 %
Wind 7 mph
UV Index (0 - 11+) 5
Weather Forecast History
Last Year's Weather on This Day (September 29, 2025)
Sunny Weather

Day

88°

Night

55°

Wind

4 mph

UV Index

50

Precipitation

1 %