National Weather Service Forecast for: 2 Miles SE Belleville IL
Issued by: National Weather Service Saint Louis, MO
Updated: 1:26 am CDT Aug 26, 2026
 
Overnight

Overnight: Mostly cloudy, with a low around 69. Calm wind.
Mostly Cloudy

 Wednesday

Wednesday: Mostly sunny, with a high near 92. Heat index values as high as 100. Calm wind becoming southwest 5 to 7 mph in the morning.
Mostly Sunny

 Wednesday
Night
Wednesday Night: Isolated showers and thunderstorms before 8pm. Mostly cloudy during the early evening, then becoming clear, with a low around 68. West wind around 5 mph becoming calm in the evening. Chance of precipitation is 20%.
Isolated
T-storms then
Mostly Clear
 Thursday

Thursday: Sunny, with a high near 87. Calm wind becoming north 5 to 8 mph in the morning.
Sunny

 Thursday
Night
Thursday Night: Mostly clear, with a low around 65. North wind 5 to 7 mph becoming calm in the evening.
Mostly Clear

 Friday

Friday: Sunny, with a high near 86.
Sunny

 Friday
Night
Friday Night: Mostly clear, with a low around 63.
Mostly Clear

 Saturday

Saturday: Sunny, with a high near 89.
Sunny

 Saturday
Night
Saturday Night: Partly cloudy, with a low around 67.
Partly Cloudy
Lo 69 °F Hi 92 °F Lo 68 °F Hi 87 °F Lo 65 °F Hi 86 °F Lo 63 °F Hi 89 °F Lo 67 °F

 

Overnight
 
 Mostly cloudy, with a low around 69. Calm wind.
Wednesday
 
 Mostly sunny, with a high near 92. Heat index values as high as 100. Calm wind becoming southwest 5 to 7 mph in the morning.
Wednesday Night
 
 Isolated showers and thunderstorms before 8pm. Mostly cloudy during the early evening, then becoming clear, with a low around 68. West wind around 5 mph becoming calm in the evening. Chance of precipitation is 20%.
Thursday
 
 Sunny, with a high near 87. Calm wind becoming north 5 to 8 mph in the morning.
Thursday Night
 
 Mostly clear, with a low around 65. North wind 5 to 7 mph becoming calm in the evening.
Friday
 
 Sunny, with a high near 86.
Friday Night
 
 Mostly clear, with a low around 63.
Saturday
 
 Sunny, with a high near 89.
Saturday Night
 
 Partly cloudy, with a low around 67.
Sunday
 
 Sunny, with a high near 93.
Sunday Night
 
 Mostly clear, with a low around 72.
Monday
 
 Mostly sunny, with a high near 96.
Monday Night
 
 Partly cloudy, with a low around 74.
Tuesday
 
 A 20 percent chance of showers. Mostly sunny, with a high near 96.

 

Forecast from NOAA-NWS for 2 Miles SE Belleville IL.