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.

N/A

Humidity NA
Wind Speed NA
Barometer NA
Dewpoint N/A
Visibility NA
Last update *** Not a current observation ***
Extended Forecast for

Brooklyn IL

  • Overnight

    Overnight: Clear, with a low around 48. South wind around 7 mph.

    Low: 48 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 81. South wind 6 to 13 mph, with gusts as high as 22 mph.

    High: 81 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 61. South wind 6 to 10 mph.

    Low: 61 °F

    Mostly Clear

  • Tuesday

    Tuesday: A slight chance of rain and thunderstorms before 1pm, then a chance of rain between 1pm and 4pm, then a chance of rain and thunderstorms after 4pm. Increasing clouds, with a high near 83. South wind 6 to 13 mph, with gusts as high as 22 mph. Chance of precipitation is 40%.

    High: 83 °F

    Mostly Sunny
    then Chance
    T-storms

  • Tuesday Night

    Tuesday Night: Rain and possibly a thunderstorm. Low around 57. Southwest wind around 11 mph, with gusts as high as 23 mph. Chance of precipitation is 90%.

    Low: 57 °F

    Rain Likely
    then Rain

  • Wednesday

    Wednesday: Rain and possibly a thunderstorm. Temperature rising to near 65 by 10am, then falling to around 51 during the remainder of the day. Chance of precipitation is 100%.

    High: 65 °F⇓

    Rain

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 35.

    Low: 35 °F

    Mostly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 56.

    High: 56 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 45.

    Low: 45 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Clear, with a low around 48. South wind around 7 mph.
Monday
Sunny, with a high near 81. South wind 6 to 13 mph, with gusts as high as 22 mph.
Monday Night
Mostly clear, with a low around 61. South wind 6 to 10 mph.
Tuesday
A slight chance of rain and thunderstorms before 1pm, then a chance of rain between 1pm and 4pm, then a chance of rain and thunderstorms after 4pm. Increasing clouds, with a high near 83. South wind 6 to 13 mph, with gusts as high as 22 mph. Chance of precipitation is 40%.
Tuesday Night
Rain and possibly a thunderstorm. Low around 57. Southwest wind around 11 mph, with gusts as high as 23 mph. Chance of precipitation is 90%.
Wednesday
Rain and possibly a thunderstorm. Temperature rising to near 65 by 10am, then falling to around 51 during the remainder of the day. Chance of precipitation is 100%.
Wednesday Night
Mostly cloudy, with a low around 35.
Thursday
Sunny, with a high near 56.
Thursday Night
Mostly cloudy, with a low around 45.
Friday
Partly sunny, with a high near 65.
Friday Night
Mostly cloudy, with a low around 40.
Saturday
Mostly sunny, with a high near 67.
Saturday Night
A 20 percent chance of rain. Mostly cloudy, with a low around 50.
Sunday
A 50 percent chance of rain and thunderstorms. Mostly cloudy, with a high near 70.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Brooklyn IL
 38.64°N 90.17°W (Elev. 400 ft)
Last Update:
1:26 am CDT Mar 9, 2026
Forecast Valid:
2am CDT Mar 9, 2026-6pm CDT Mar 15, 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