National Weather Service Forecast for: Florissant MO
Issued by: National Weather Service Saint Louis, MO
Updated: 10:36 am CST Nov 1, 2026
 
This
Afternoon
This Afternoon: Cloudy, with a high near 65. Southeast wind 8 to 11 mph.
Cloudy

 Tonight

Tonight: Patchy fog after 11pm. Otherwise, cloudy, with a low around 56. Southeast wind around 8 mph.
Patchy Fog

 Monday

Monday: Patchy fog before 7am. Otherwise, cloudy, with a high near 70. South wind 8 to 15 mph, with gusts as high as 24 mph.
Patchy Fog
then Cloudy
 Monday
Night
Monday Night: A 20 percent chance of rain after 1am. Cloudy, with a low around 63. South wind 15 to 17 mph, with gusts as high as 25 mph.
Mostly Cloudy
then Slight
Chance Rain
 Tuesday

Tuesday: Rain likely, then rain and possibly a thunderstorm after noon. High near 74. South wind 16 to 18 mph, with gusts as high as 28 mph. Chance of precipitation is 90%.
Rain

 Tuesday
Night
Tuesday Night: Rain likely and possibly a thunderstorm. Mostly cloudy, with a low around 56. Chance of precipitation is 70%.
Rain Likely
then Chance
Rain
 Wednesday

Wednesday: A 30 percent chance of rain, mainly before noon. Partly sunny, with a high near 68.
Chance Rain

 Wednesday
Night
Wednesday Night: Partly cloudy, with a low around 50.
Partly Cloudy

 Thursday

Thursday: Partly sunny, with a high near 67.
Partly Sunny
Hi 65 °F Lo 56 °F Hi 70 °F Lo 63 °F Hi 74 °F Lo 56 °F Hi 68 °F Lo 50 °F Hi 67 °F

 

This Afternoon
 
 Cloudy, with a high near 65. Southeast wind 8 to 11 mph.
Tonight
 
 Patchy fog after 11pm. Otherwise, cloudy, with a low around 56. Southeast wind around 8 mph.
Monday
 
 Patchy fog before 7am. Otherwise, cloudy, with a high near 70. South wind 8 to 15 mph, with gusts as high as 24 mph.
Monday Night
 
 A 20 percent chance of rain after 1am. Cloudy, with a low around 63. South wind 15 to 17 mph, with gusts as high as 25 mph.
Tuesday
 
 Rain likely, then rain and possibly a thunderstorm after noon. High near 74. South wind 16 to 18 mph, with gusts as high as 28 mph. Chance of precipitation is 90%.
Tuesday Night
 
 Rain likely and possibly a thunderstorm. Mostly cloudy, with a low around 56. Chance of precipitation is 70%.
Wednesday
 
 A 30 percent chance of rain, mainly before noon. Partly sunny, with a high near 68.
Wednesday Night
 
 Partly cloudy, with a low around 50.
Thursday
 
 Partly sunny, with a high near 67.
Thursday Night
 
 A 20 percent chance of rain before midnight. Mostly cloudy, with a low around 50.
Friday
 
 Partly sunny, with a high near 65.
Friday Night
 
 Mostly cloudy, with a low around 47.
Saturday
 
 Mostly sunny, with a high near 66.

 

Forecast from NOAA-NWS for Florissant MO.