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.

Thunderstorm Heavy Rain Fog/Mist

74°F

23°C

Humidity 91%
Wind Speed SE 16 G 22 mph
Barometer 30.02 in (1016.0 mb)
Dewpoint 71°F (22°C)
Visibility 1.50 mi
Last update 13 Jul 11:53 am CDT
Extended Forecast for

Waterloo IL

  • This Afternoon

    This Afternoon: Showers and thunderstorms likely, mainly after 3pm. Mostly cloudy, with a temperature falling to around 77 by 4pm. Southwest wind around 6 mph. Chance of precipitation is 70%.

    High: 85 °F⇓

    T-storms
    Likely

  • Tonight

    Tonight: A 30 percent chance of showers and thunderstorms, mainly before 9pm. Patchy fog after 4am. Otherwise, mostly cloudy, with a low around 69. Light and variable wind.

    Low: 69 °F

    Chance
    T-storms then
    Patchy Fog

  • Monday

    Monday: A 20 percent chance of showers and thunderstorms after 2pm. Patchy fog before 7am. Otherwise, cloudy, then gradually becoming mostly sunny, with a high near 86. Calm wind becoming southeast around 5 mph.

    High: 86 °F

    Patchy Fog
    then Slight
    Chance
    T-storms

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 70. Southeast wind around 5 mph becoming calm in the evening.

    Low: 70 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: A 40 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 90. Calm wind becoming south around 6 mph in the morning.

    High: 90 °F

    Partly Sunny
    then Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 72.

    Low: 72 °F

    Slight Chance
    T-storms

  • Wednesday

    Wednesday: A 40 percent chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 92.

    High: 92 °F

    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A 30 percent chance of showers and thunderstorms, mainly before 1am. Partly cloudy, with a low around 72.

    Low: 72 °F

    Chance
    T-storms

  • Thursday

    Thursday: A 40 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 90.

    High: 90 °F

    Mostly Sunny
    then Chance
    T-storms

Detailed Forecast

This Afternoon
Showers and thunderstorms likely, mainly after 3pm. Mostly cloudy, with a temperature falling to around 77 by 4pm. Southwest wind around 6 mph. Chance of precipitation is 70%.
Tonight
A 30 percent chance of showers and thunderstorms, mainly before 9pm. Patchy fog after 4am. Otherwise, mostly cloudy, with a low around 69. Light and variable wind.
Monday
A 20 percent chance of showers and thunderstorms after 2pm. Patchy fog before 7am. Otherwise, cloudy, then gradually becoming mostly sunny, with a high near 86. Calm wind becoming southeast around 5 mph.
Monday Night
Mostly cloudy, with a low around 70. Southeast wind around 5 mph becoming calm in the evening.
Tuesday
A 40 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 90. Calm wind becoming south around 6 mph in the morning.
Tuesday Night
A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 72.
Wednesday
A 40 percent chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 92.
Wednesday Night
A 30 percent chance of showers and thunderstorms, mainly before 1am. Partly cloudy, with a low around 72.
Thursday
A 40 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 90.
Thursday Night
A 30 percent chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 71.
Friday
A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 88.
Friday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 71.
Saturday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 90.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Waterloo IL
 38.35°N 90.16°W (Elev. 650 ft)
Last Update:
12:21 pm CDT Jul 13, 2025
Forecast Valid:
12pm CDT Jul 13, 2025-6pm CDT Jul 19, 2025
 
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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