St. Peters, Missouri Weather:
Tuesday, October 20, 2026
Partly Sunny with Showers
Day 61°
Night 39°
Precipitation 1 %
Wind 11 mph
Weather Forecast History
Last Year's Weather on This Day (October 20, 2025)
Sunny Weather

Day

73°

Night

46°

Wind

12 mph

UV Index

40

Precipitation

0 %