St. Peters, Missouri Weather:
Friday, December 18, 2026
Snowy Weather
Day 39°
Night 21°
Precipitation 45 %
Wind 20 mph
Weather Forecast History
Last Year's Weather on This Day (December 18, 2025)
Rainy Weather

Day

59°

Night

23°

Wind

15 mph

UV Index

1

Precipitation

100 %