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.

Overcast

36°F

2°C

Humidity 55%
Wind Speed W 6 mph
Barometer 29.75 in (1007.8 mb)
Dewpoint 21°F (-6°C)
Visibility 10.00 mi
Wind Chill31°F (-1°C)
Last update 16 Jan 8:53 am CST
Extended Forecast for

Waterloo IL

  • Today

    Today: A slight chance of rain and snow before noon, then a slight chance of rain after 4pm. Cloudy, with a high near 44. West wind 9 to 13 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.

    High: 44 °F

    Slight Chance
    Rain/Snow
    then Slight
    Chance Rain

  • Tonight

    Tonight: A chance of rain and snow before 8pm, then a chance of snow between 8pm and midnight. Cloudy during the early evening, then gradual clearing, with a low around 21. Northwest wind 8 to 11 mph, with gusts as high as 25 mph. Chance of precipitation is 50%.

    Low: 21 °F

    Chance
    Rain/Snow
    then Partly
    Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 28. West wind 8 to 15 mph, with gusts as high as 23 mph.

    High: 28 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 12. Northwest wind 6 to 10 mph.

    Low: 12 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 33. Southwest wind 6 to 11 mph, with gusts as high as 20 mph.

    High: 33 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 14.

    Low: 14 °F

    Partly Cloudy

  • M.L.King Day

    M.L.King Day: Sunny, with a high near 24.

    High: 24 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 11.

    Low: 11 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 39.

    High: 39 °F

    Sunny

Detailed Forecast

Today
A slight chance of rain and snow before noon, then a slight chance of rain after 4pm. Cloudy, with a high near 44. West wind 9 to 13 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.
Tonight
A chance of rain and snow before 8pm, then a chance of snow between 8pm and midnight. Cloudy during the early evening, then gradual clearing, with a low around 21. Northwest wind 8 to 11 mph, with gusts as high as 25 mph. Chance of precipitation is 50%.
Saturday
Partly sunny, with a high near 28. West wind 8 to 15 mph, with gusts as high as 23 mph.
Saturday Night
Mostly clear, with a low around 12. Northwest wind 6 to 10 mph.
Sunday
Mostly sunny, with a high near 33. Southwest wind 6 to 11 mph, with gusts as high as 20 mph.
Sunday Night
Partly cloudy, with a low around 14.
M.L.King Day
Sunny, with a high near 24.
Monday Night
Mostly clear, with a low around 11.
Tuesday
Sunny, with a high near 39.
Tuesday Night
Mostly clear, with a low around 27.
Wednesday
Mostly sunny, with a high near 50.
Wednesday Night
A 20 percent chance of rain. Mostly cloudy, with a low around 28.
Thursday
A 20 percent chance of rain. Partly sunny, with a high near 42.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Waterloo IL
 38.33°N 90.16°W (Elev. 600 ft)
Last Update:
8:06 am CST Jan 16, 2026
Forecast Valid:
9am CST Jan 16, 2026-6pm CST Jan 22, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation