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.

Light Rain

42°F

6°C

Humidity 68%
Wind Speed NE 5 mph
Barometer 29.83 in (1010.1 mb)
Dewpoint 32°F (0°C)
Visibility 10.00 mi
Wind Chill39°F (4°C)
Last update 26 Feb 2:53 am CST
Extended Forecast for

Summerfield IL

  • Overnight

    Overnight: A 30 percent chance of rain, mainly before 4am. Mostly cloudy, with a steady temperature around 40. Northeast wind 8 to 11 mph.

    Low: 40 °F

    Chance Rain

  • Thursday

    Thursday: Mostly sunny, with a high near 55. East wind 5 to 8 mph becoming calm in the afternoon.

    High: 55 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Clear, with a low around 36. Calm wind becoming southwest around 5 mph after midnight.

    Low: 36 °F

    Clear

  • Friday

    Friday: Sunny, with a high near 72. Southwest wind 6 to 11 mph increasing to 13 to 18 mph in the afternoon.

    High: 72 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 40. South wind 6 to 9 mph becoming north after midnight.

    Low: 40 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 63.

    High: 63 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: A 20 percent chance of rain. Partly cloudy, with a low around 31.

    Low: 31 °F

    Slight Chance
    Rain

  • Sunday

    Sunday: A chance of rain before noon, then a chance of rain and snow. Cloudy, with a high near 40. Chance of precipitation is 50%.

    High: 40 °F

    Chance Rain
    then Chance
    Rain/Snow

  • Sunday Night

    Sunday Night: Rain and snow likely, mainly before midnight. Cloudy, with a low around 27. Chance of precipitation is 70%.

    Low: 27 °F

    Rain/Snow
    Likely

Detailed Forecast

Overnight
A 30 percent chance of rain, mainly before 4am. Mostly cloudy, with a steady temperature around 40. Northeast wind 8 to 11 mph.
Thursday
Mostly sunny, with a high near 55. East wind 5 to 8 mph becoming calm in the afternoon.
Thursday Night
Clear, with a low around 36. Calm wind becoming southwest around 5 mph after midnight.
Friday
Sunny, with a high near 72. Southwest wind 6 to 11 mph increasing to 13 to 18 mph in the afternoon.
Friday Night
Mostly clear, with a low around 40. South wind 6 to 9 mph becoming north after midnight.
Saturday
Mostly sunny, with a high near 63.
Saturday Night
A 20 percent chance of rain. Partly cloudy, with a low around 31.
Sunday
A chance of rain before noon, then a chance of rain and snow. Cloudy, with a high near 40. Chance of precipitation is 50%.
Sunday Night
Rain and snow likely, mainly before midnight. Cloudy, with a low around 27. Chance of precipitation is 70%.
Monday
A chance of rain and snow before noon, then a slight chance of rain. Cloudy, with a high near 41. Chance of precipitation is 30%.
Monday Night
A 40 percent chance of rain. Mostly cloudy, with a low around 26.
Tuesday
A 40 percent chance of rain. Cloudy, with a high near 43.
Tuesday Night
A 40 percent chance of rain. Cloudy, with a low around 31.
Wednesday
A 40 percent chance of rain. Mostly cloudy, with a high near 51.
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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:
1:51 am CST Feb 26, 2026
Forecast Valid:
3am CST Feb 26, 2026-6pm CST Mar 4, 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