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

Hazardous Weather Conditions

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

4 Miles SW Waterloo IL

  • Overnight

    Overnight: Showers likely and possibly a thunderstorm. Patchy fog. Otherwise, cloudy, with a low around 38. Southeast wind around 6 mph. Chance of precipitation is 60%.

    Low: 38 °F

    Showers
    Likely and
    Patchy Fog

  • Tuesday

    Tuesday: Showers likely and possibly a thunderstorm before 7am, then a chance of showers and thunderstorms between 7am and 5pm, then showers likely and possibly a thunderstorm after 5pm. Patchy fog before noon. Otherwise, cloudy, with a high near 60. Southeast wind 5 to 7 mph. Chance of precipitation is 60%.

    High: 60 °F

    Showers
    Likely and
    Patchy Fog

  • Tuesday Night

    Tuesday Night: Showers and thunderstorms likely, then showers and possibly a thunderstorm after 2am. Patchy fog before 11pm, then patchy fog after 5am. Low around 50. East wind around 7 mph. Chance of precipitation is 80%.

    Low: 50 °F

    Showers and
    Patchy Fog

  • Wednesday

    Wednesday: Showers and possibly a thunderstorm. Patchy fog before 9am. High near 66. East wind 5 to 8 mph becoming southwest in the afternoon. Chance of precipitation is 90%.

    High: 66 °F

    Showers and
    Patchy Fog

  • Wednesday Night

    Wednesday Night: Showers and possibly a thunderstorm. Low around 55. South wind 6 to 8 mph. Chance of precipitation is 90%.

    Low: 55 °F

    Showers

  • Thursday

    Thursday: Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 70. Chance of precipitation is 70%.

    High: 70 °F

    Showers
    Likely then
    Chance
    Showers

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms before 9pm, then a chance of showers between 9pm and midnight, then a chance of showers and thunderstorms after midnight. Mostly cloudy, with a low around 57. Chance of precipitation is 50%.

    Low: 57 °F

    Chance
    Showers then
    Chance
    T-storms

  • Friday

    Friday: A chance of showers and thunderstorms before noon, then a slight chance of showers. Partly sunny, with a high near 78. Chance of precipitation is 30%.

    High: 78 °F

    Chance
    Showers

  • Friday Night

    Friday Night: A chance of showers, then showers and possibly a thunderstorm after midnight. Low around 59. Chance of precipitation is 80%.

    Low: 59 °F

    Chance
    Showers then
    Showers

Detailed Forecast

Overnight
Showers likely and possibly a thunderstorm. Patchy fog. Otherwise, cloudy, with a low around 38. Southeast wind around 6 mph. Chance of precipitation is 60%.
Tuesday
Showers likely and possibly a thunderstorm before 7am, then a chance of showers and thunderstorms between 7am and 5pm, then showers likely and possibly a thunderstorm after 5pm. Patchy fog before noon. Otherwise, cloudy, with a high near 60. Southeast wind 5 to 7 mph. Chance of precipitation is 60%.
Tuesday Night
Showers and thunderstorms likely, then showers and possibly a thunderstorm after 2am. Patchy fog before 11pm, then patchy fog after 5am. Low around 50. East wind around 7 mph. Chance of precipitation is 80%.
Wednesday
Showers and possibly a thunderstorm. Patchy fog before 9am. High near 66. East wind 5 to 8 mph becoming southwest in the afternoon. Chance of precipitation is 90%.
Wednesday Night
Showers and possibly a thunderstorm. Low around 55. South wind 6 to 8 mph. Chance of precipitation is 90%.
Thursday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 70. Chance of precipitation is 70%.
Thursday Night
A chance of showers and thunderstorms before 9pm, then a chance of showers between 9pm and midnight, then a chance of showers and thunderstorms after midnight. Mostly cloudy, with a low around 57. Chance of precipitation is 50%.
Friday
A chance of showers and thunderstorms before noon, then a slight chance of showers. Partly sunny, with a high near 78. Chance of precipitation is 30%.
Friday Night
A chance of showers, then showers and possibly a thunderstorm after midnight. Low around 59. Chance of precipitation is 80%.
Saturday
Showers likely and possibly a thunderstorm before noon, then a slight chance of showers and thunderstorms after noon. Mostly cloudy, with a high near 69. Chance of precipitation is 70%.
Saturday Night
A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 45.
Sunday
Partly sunny, with a high near 68.
Sunday Night
Partly cloudy, with a low around 50.
Monday
A 20 percent chance of showers. Sunny, with a high near 73.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles SW Waterloo IL
 38.29°N 90.19°W (Elev. 633 ft)
Last Update:
4:46 am CST Mar 3, 2026
Forecast Valid:
5am CST Mar 3, 2026-6pm CDT Mar 9, 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