St. Peters, Missouri Weather:
Monday, December 21, 2026
Snowy Weather
Day 34°
Night 21°
Precipitation 0 %
Wind 7 mph
Weather Forecast History
Last Year's Weather on This Day (December 21, 2025)
Cloudy Weather

Day

46°

Night

28°

Wind

4 mph

UV Index

2

Precipitation

0 %