St. Peters, Missouri Weather:
Sunday, December 20, 2026
Snowy Weather
Day 36°
Night 18°
Precipitation 4 %
Wind 6 mph
Weather Forecast History
Last Year's Weather on This Day (December 20, 2025)
Cloudy Weather

Day

55°

Night

25°

Wind

11 mph

UV Index

2

Precipitation

0 %