National Weather Service Forecast for: 2 Miles NNE O'Fallon MO
Issued by: National Weather Service Saint Louis, MO
Updated: 1:26 am CDT Apr 6, 2026
 
Overnight

Overnight: Clear, with a low around 40. Calm wind becoming west around 5 mph.
Clear
 Monday

Monday: Sunny, with a high near 63. North wind 6 to 10 mph.
Sunny
 Monday
Night
Monday Night: Increasing clouds, with a low around 37. Northeast wind 7 to 10 mph, with gusts as high as 20 mph.
Increasing
Clouds
 Tuesday

Tuesday: Mostly cloudy, with a high near 55. East wind around 10 mph.
Mostly Cloudy
 Tuesday
Night
Tuesday Night: Mostly cloudy, with a low around 41. East wind around 9 mph.
Mostly Cloudy
 Wednesday

Wednesday: Mostly sunny, with a high near 73.
Mostly Sunny
 Wednesday
Night
Wednesday Night: Partly cloudy, with a low around 55.
Partly Cloudy
 Thursday

Thursday: A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 72. Chance of precipitation is 30%.
Chance
Showers
 Thursday
Night
Thursday Night: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 57.
Chance
T-storms
Lo 40 °F Hi 63 °F Lo 37 °F Hi 55 °F Lo 41 °F Hi 73 °F Lo 55 °F Hi 72 °F Lo 57 °F

 

Overnight
 
 Clear, with a low around 40. Calm wind becoming west around 5 mph.
Monday
 
 Sunny, with a high near 63. North wind 6 to 10 mph.
Monday Night
 
 Increasing clouds, with a low around 37. Northeast wind 7 to 10 mph, with gusts as high as 20 mph.
Tuesday
 
 Mostly cloudy, with a high near 55. East wind around 10 mph.
Tuesday Night
 
 Mostly cloudy, with a low around 41. East wind around 9 mph.
Wednesday
 
 Mostly sunny, with a high near 73.
Wednesday Night
 
 Partly cloudy, with a low around 55.
Thursday
 
 A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 72. Chance of precipitation is 30%.
Thursday Night
 
 A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 57.
Friday
 
 Showers likely, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 73. Chance of precipitation is 60%.
Friday Night
 
 A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 57.
Saturday
 
 A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 79.
Saturday Night
 
 A 20 percent chance of showers. Mostly cloudy, with a low around 61.
Sunday
 
 A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 81.

 

Forecast from NOAA-NWS for 2 Miles NNE O'Fallon MO.