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

83°F

28°C

Humidity 30%
Wind Speed Vrbl 3 mph
Barometer 29.92 in (1013.0 mb)
Dewpoint 48°F (9°C)
Visibility 10.00 mi
Heat Index81°F (27°C)
Last update 29 Sep 4:53 pm CDT
Extended Forecast for

Summerfield IL

  • Tonight

    Tonight: Increasing clouds, with a low around 65. South wind around 6 mph.

    Low: 65 °F

    Increasing
    Clouds

  • Wednesday

    Wednesday: Partly sunny, with a high near 90. South wind 5 to 10 mph.

    High: 90 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 71. South wind 7 to 9 mph.

    Low: 71 °F

    Mostly Cloudy

  • Thursday

    Thursday: A 20 percent chance of showers after 1pm. Mostly cloudy, with a high near 89. Southwest wind 8 to 15 mph.

    High: 89 °F

    Partly Sunny
    then Slight
    Chance
    Showers

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms before 1am, then showers between 1am and 4am, then showers and possibly a thunderstorm after 4am. Low around 68. Southwest wind 3 to 7 mph. Chance of precipitation is 80%.

    Low: 68 °F

    Chance
    Showers then
    Showers

  • Friday

    Friday: Showers and possibly a thunderstorm before 1pm, then a chance of showers. High near 73. Chance of precipitation is 80%.

    High: 73 °F

    Showers

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 56.

    Low: 56 °F

    Mostly Cloudy

  • Saturday

    Saturday: A 20 percent chance of showers after 1pm. Partly sunny, with a high near 70.

    High: 70 °F

    Partly Sunny
    then Slight
    Chance
    Showers

  • Saturday Night

    Saturday Night: A 20 percent chance of showers before 1am. Mostly cloudy, with a low around 54.

    Low: 54 °F

    Slight Chance
    Showers

Detailed Forecast

Tonight
Increasing clouds, with a low around 65. South wind around 6 mph.
Wednesday
Partly sunny, with a high near 90. South wind 5 to 10 mph.
Wednesday Night
Mostly cloudy, with a low around 71. South wind 7 to 9 mph.
Thursday
A 20 percent chance of showers after 1pm. Mostly cloudy, with a high near 89. Southwest wind 8 to 15 mph.
Thursday Night
A chance of showers and thunderstorms before 1am, then showers between 1am and 4am, then showers and possibly a thunderstorm after 4am. Low around 68. Southwest wind 3 to 7 mph. Chance of precipitation is 80%.
Friday
Showers and possibly a thunderstorm before 1pm, then a chance of showers. High near 73. Chance of precipitation is 80%.
Friday Night
Mostly cloudy, with a low around 56.
Saturday
A 20 percent chance of showers after 1pm. Partly sunny, with a high near 70.
Saturday Night
A 20 percent chance of showers before 1am. Mostly cloudy, with a low around 54.
Sunday
Mostly sunny, with a high near 72.
Sunday Night
Mostly clear, with a low around 51.
Monday
Sunny, with a high near 69.
Monday Night
Mostly clear, with a low around 48.
Tuesday
Sunny, with a high near 70.
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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:
4:11 pm CDT Sep 29, 2026
Forecast Valid:
5pm CDT Sep 29, 2026-6pm CDT Oct 6, 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