St. Peters, Missouri Weather:
Tuesday, October 20, 2026
Sunny Weather
Day 77°
Night 54°
Precipitation 4 %
Wind 4 mph
UV Index (0 - 11+) 4
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 %