Current conditions at

St. Louis Downtown Airport (KCPS)

Lat: 38.56°NLon: 90.15°WElev: 410ft.

Overcast

58°F

14°C

Humidity 72%
Wind Speed W 10 mph
Barometer 29.81 in (1009.4 mb)
Dewpoint 49°F (9°C)
Visibility 10.00 mi
Last update 4 Nov 11:53 am CST
Extended Forecast for

Belleville IL

  • This Afternoon

    This Afternoon: Mostly cloudy, with a high near 60. West wind 6 to 10 mph, with gusts as high as 20 mph.

    High: 60 °F

    Mostly Cloudy

  • Tonight

    Tonight: Mostly cloudy, then gradually becoming mostly clear, with a low around 45. West wind 3 to 5 mph.

    Low: 45 °F

    Decreasing
    Clouds

  • Thursday

    Thursday: Increasing clouds, with a high near 63. West wind 5 to 10 mph.

    High: 63 °F

    Increasing
    Clouds

  • Thursday Night

    Thursday Night: Isolated showers between 9pm and 10pm.  Mostly cloudy, with a low around 47. Northwest wind 3 to 6 mph.  Chance of precipitation is 20%.

    Low: 47 °F

    Isolated
    Showers then
    Mostly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 58. North wind 6 to 10 mph.

    High: 58 °F

    Partly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 38.

    Low: 38 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 55.

    High: 55 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 36.

    Low: 36 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 60.

    High: 60 °F

    Sunny

Detailed Forecast

This Afternoon
Mostly cloudy, with a high near 60. West wind 6 to 10 mph, with gusts as high as 20 mph.
Tonight
Mostly cloudy, then gradually becoming mostly clear, with a low around 45. West wind 3 to 5 mph.
Thursday
Increasing clouds, with a high near 63. West wind 5 to 10 mph.
Thursday Night
Isolated showers between 9pm and 10pm. Mostly cloudy, with a low around 47. Northwest wind 3 to 6 mph. Chance of precipitation is 20%.
Friday
Partly sunny, with a high near 58. North wind 6 to 10 mph.
Friday Night
Partly cloudy, with a low around 38.
Saturday
Mostly sunny, with a high near 55.
Saturday Night
Partly cloudy, with a low around 36.
Sunday
Sunny, with a high near 60.
Sunday Night
Clear, with a low around 37.
Monday
Sunny, with a high near 66.
Monday Night
Clear, with a low around 43.
Tuesday
Sunny, with a high near 69.
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ABOUT THIS FORECAST

 
Point Forecast:
Belleville IL
 38.52°N 89.98°W (Elev. 509 ft)
11:31 am CST Nov 4, 2026
12pm CST Nov 4, 2026-6pm CST Nov 10, 2026
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database