National Weather Service Forecast for: 2 Miles NNE O'Fallon MO
Issued by: National Weather Service Saint Louis, MO
Updated: 2:26 am CST Dec 20, 2025
 
Overnight

Overnight: Mostly clear, with a low around 32. Light southeast wind becoming south 6 to 11 mph. Winds could gust as high as 21 mph.
Mostly Clear
 Saturday

Saturday: Mostly sunny, with a high near 55. South wind 7 to 11 mph becoming north in the afternoon. Winds could gust as high as 22 mph.
Mostly Sunny
 Saturday
Night
Saturday Night: Mostly cloudy, then gradually becoming mostly clear, with a low around 28. North wind 3 to 6 mph.
Decreasing
Clouds
 Sunday

Sunday: Sunny, with a high near 43. Calm wind becoming east around 6 mph in the afternoon.
Sunny
 Sunday
Night
Sunday Night: Partly cloudy, with a low around 31. Southeast wind 3 to 7 mph.
Partly Cloudy
 Monday

Monday: Partly sunny, with a high near 53.
Partly Sunny
 Monday
Night
Monday Night: Partly cloudy, with a low around 46.
Partly Cloudy
 Tuesday

Tuesday: Mostly sunny, with a high near 62.
Mostly Sunny
 Tuesday
Night
Tuesday Night: Mostly cloudy, with a low around 48.
Mostly Cloudy
Lo 32 °F Hi 55 °F Lo 28 °F Hi 43 °F Lo 31 °F Hi 53 °F Lo 46 °F Hi 62 °F Lo 48 °F

 

Overnight
 
 Mostly clear, with a low around 32. Light southeast wind becoming south 6 to 11 mph. Winds could gust as high as 21 mph.
Saturday
 
 Mostly sunny, with a high near 55. South wind 7 to 11 mph becoming north in the afternoon. Winds could gust as high as 22 mph.
Saturday Night
 
 Mostly cloudy, then gradually becoming mostly clear, with a low around 28. North wind 3 to 6 mph.
Sunday
 
 Sunny, with a high near 43. Calm wind becoming east around 6 mph in the afternoon.
Sunday Night
 
 Partly cloudy, with a low around 31. Southeast wind 3 to 7 mph.
Monday
 
 Partly sunny, with a high near 53.
Monday Night
 
 Partly cloudy, with a low around 46.
Tuesday
 
 Mostly sunny, with a high near 62.
Tuesday Night
 
 Mostly cloudy, with a low around 48.
Wednesday
 
 Mostly cloudy, with a high near 71.
Wednesday Night
 
 Partly cloudy, with a low around 59.
Christmas Day
 
 Sunny, with a high near 74.
Thursday Night
 
 Partly cloudy, with a low around 53.
Friday
 
 Partly sunny, with a high near 67.

 

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