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

56°F

13°C

Humidity 72%
Wind Speed Calm
Barometer 29.89 in (1011.8 mb)
Dewpoint 47°F (8°C)
Visibility 10.00 mi
Last update 21 Mar 1:53 am CDT
Extended Forecast for

Summerfield IL

  • Overnight

    Overnight: Mostly clear, with a low around 50. Light east wind.

    Low: 50 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 85. Light and variable wind becoming southwest 5 to 7 mph in the morning.

    High: 85 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 62. South wind 5 to 9 mph.

    Low: 62 °F

    Mostly Clear

  • Sunday

    Sunday: Increasing clouds, with a high near 86. South wind 9 to 17 mph becoming west in the afternoon.

    High: 86 °F

    Increasing
    Clouds

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms before 10pm, then a chance of showers between 10pm and 1am. Partly cloudy, with a low around 38. Breezy, with a north wind 13 to 22 mph, with gusts as high as 30 mph. Chance of precipitation is 30%.

    Low: 38 °F

    Chance
    Showers and
    Breezy

  • 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 61.

    High: 61 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: A 20 percent chance of rain. Mostly cloudy, with a low around 44.

    Low: 44 °F

    Slight Chance
    Rain

Detailed Forecast

Overnight
Mostly clear, with a low around 50. Light east wind.
Saturday
Sunny, with a high near 85. Light and variable wind becoming southwest 5 to 7 mph in the morning.
Saturday Night
Mostly clear, with a low around 62. South wind 5 to 9 mph.
Sunday
Increasing clouds, with a high near 86. South wind 9 to 17 mph becoming west in the afternoon.
Sunday Night
A chance of showers and thunderstorms before 10pm, then a chance of showers between 10pm and 1am. Partly cloudy, with a low around 38. Breezy, with a north wind 13 to 22 mph, with gusts as high as 30 mph. Chance of precipitation is 30%.
Monday
Mostly sunny, with a high near 57.
Monday Night
Partly cloudy, with a low around 40.
Tuesday
Partly sunny, with a high near 61.
Tuesday Night
A 20 percent chance of rain. Mostly cloudy, with a low around 44.
Wednesday
A 20 percent chance of rain before 1pm. Mostly cloudy, with a high near 70.
Wednesday Night
A 20 percent chance of rain. Mostly cloudy, with a low around 55.
Thursday
A 20 percent chance of rain. Sunny, with a high near 80.
Thursday Night
A 40 percent chance of rain and thunderstorms. Partly cloudy, with a low around 46.
Friday
A 30 percent chance of rain. Partly sunny, with a high near 57.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Summerfield IL
 38.61°N 89.75°W (Elev. 482 ft)
Last Update:
1:26 am CDT Mar 21, 2026
Forecast Valid:
2am CDT Mar 21, 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