St. Peters, Missouri Weather:
Wednesday, October 21, 2026
Rainy Weather
Day 77°
Night 55°
Precipitation 55 %
Wind 7 mph
UV Index (0 - 11+) 1
Weather Forecast History
Last Year's Weather on This Day (October 21, 2025)
Cloudy Weather

Day

63°

Night

41°

Wind

15 mph

UV Index

40

Precipitation

0 %