National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

St. Louis Downtown Airport (KCPS)

Lat: 38.56°NLon: 90.15°WElev: 410ft.

Fair

72°F

22°C

Humidity 40%
Wind Speed Calm
Barometer 29.84 in (1010.4 mb)
Dewpoint 46°F (8°C)
Visibility 10.00 mi
Last update 20 Mar 7:53 pm CDT
Extended Forecast for

Summerfield IL

  • Tonight

    Tonight: Partly cloudy, with a low around 51. Northwest wind around 6 mph becoming light and variable.

    Low: 51 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 85. East wind 5 to 7 mph becoming south in the afternoon.

    High: 85 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 62. South wind 6 to 9 mph.

    Low: 62 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 86. South wind 9 to 15 mph becoming west in the afternoon.

    High: 86 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 40. North wind 14 to 18 mph, with gusts as high as 26 mph.

    Low: 40 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 57.

    High: 57 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 40.

    Low: 40 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 59.

    High: 59 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: A 20 percent chance of rain and thunderstorms after 1am. Mostly cloudy, with a low around 43.

    Low: 43 °F

    Partly Cloudy
    then Slight
    Chance
    T-storms

Detailed Forecast

Tonight
Partly cloudy, with a low around 51. Northwest wind around 6 mph becoming light and variable.
Saturday
Sunny, with a high near 85. East wind 5 to 7 mph becoming south in the afternoon.
Saturday Night
Mostly clear, with a low around 62. South wind 6 to 9 mph.
Sunday
Mostly sunny, with a high near 86. South wind 9 to 15 mph becoming west in the afternoon.
Sunday Night
Partly cloudy, with a low around 40. North wind 14 to 18 mph, with gusts as high as 26 mph.
Monday
Mostly sunny, with a high near 57.
Monday Night
Partly cloudy, with a low around 40.
Tuesday
Partly sunny, with a high near 59.
Tuesday Night
A 20 percent chance of rain and thunderstorms after 1am. Mostly cloudy, with a low around 43.
Wednesday
Mostly cloudy, with a high near 66.
Wednesday Night
Mostly cloudy, with a low around 51.
Thursday
A 20 percent chance of rain. Sunny, with a high near 77.
Thursday Night
A 50 percent chance of rain. Partly cloudy, with a low around 42.
Friday
A 30 percent chance of rain. Partly sunny, with a high near 53.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Summerfield IL
 38.61°N 89.75°W (Elev. 482 ft)
Last Update:
7:31 pm CDT Mar 20, 2026
Forecast Valid:
8pm CDT Mar 20, 2026-6pm CDT Mar 27, 2026
 
Forecast Discussion
 
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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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation