National Weather Service Forecast for: Saint Peters MO
Issued by: National Weather Service Saint Louis, MO
Updated: 1:25 pm CDT May 4, 2026
 
This
Afternoon
This Afternoon: A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 80. Southwest wind 11 to 15 mph, with gusts as high as 28 mph.
Chance
T-storms

 Tonight

Tonight: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 57. Southwest wind 5 to 13 mph, with gusts as high as 21 mph. Chance of precipitation is 60%.
Chance
T-storms then
Showers
Likely
 Tuesday

Tuesday: Showers and thunderstorms before 11am, then showers and possibly a thunderstorm, mainly after 11am. High near 58. Northeast wind 7 to 10 mph, with gusts as high as 23 mph. Chance of precipitation is 80%.
Showers

 Tuesday
Night
Tuesday Night: Showers and possibly a thunderstorm. Low around 45. North wind 7 to 11 mph, with gusts as high as 20 mph. Chance of precipitation is 80%.
Showers

 Wednesday

Wednesday: A 30 percent chance of showers, mainly before 1pm. Mostly cloudy, with a high near 58. North wind around 7 mph.
Chance
Showers

 Wednesday
Night
Wednesday Night: Partly cloudy, with a low around 42.
Partly Cloudy

 Thursday

Thursday: Sunny, with a high near 65.
Sunny

 Thursday
Night
Thursday Night: Mostly clear, with a low around 47.
Mostly Clear

 Friday

Friday: A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 73.
Sunny then
Slight Chance
T-storms
Hi 80 °F Lo 57 °F Hi 58 °F Lo 45 °F Hi 58 °F Lo 42 °F Hi 65 °F Lo 47 °F Hi 73 °F

Hazardous Weather Outlook
 

This Afternoon
 
 A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 80. Southwest wind 11 to 15 mph, with gusts as high as 28 mph.
Tonight
 
 A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 57. Southwest wind 5 to 13 mph, with gusts as high as 21 mph. Chance of precipitation is 60%.
Tuesday
 
 Showers and thunderstorms before 11am, then showers and possibly a thunderstorm, mainly after 11am. High near 58. Northeast wind 7 to 10 mph, with gusts as high as 23 mph. Chance of precipitation is 80%.
Tuesday Night
 
 Showers and possibly a thunderstorm. Low around 45. North wind 7 to 11 mph, with gusts as high as 20 mph. Chance of precipitation is 80%.
Wednesday
 
 A 30 percent chance of showers, mainly before 1pm. Mostly cloudy, with a high near 58. North wind around 7 mph.
Wednesday Night
 
 Partly cloudy, with a low around 42.
Thursday
 
 Sunny, with a high near 65.
Thursday Night
 
 Mostly clear, with a low around 47.
Friday
 
 A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 73.
Friday Night
 
 A chance of showers and thunderstorms before 1am, then a slight chance of showers. Partly cloudy, with a low around 50. Chance of precipitation is 30%.
Saturday
 
 Sunny, with a high near 78.
Saturday Night
 
 A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 55.
Sunday
 
 A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 74.

 

Forecast from NOAA-NWS for Saint Peters MO.