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National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
7-Day Forecast 42.49°N 92.35°W (Text-Only)
NWS Forecast for: Waterloo IA
Issued by: National Weather Service Des Moines, IA
Last Update: 10:43 pm CDT Jun 29, 2026		Print

  • Tonight

    Tonight: A 20 percent chance of showers and thunderstorms after 4am. Partly cloudy, with a low around 77. South southwest wind 11 to 15 mph, with gusts as high as 21 mph.

    Low: 77 °F

    Slight Chance
    T-storms



  • Tuesday

    Tuesday: Mostly sunny, with a high near 94. Heat index values as high as 105. Breezy, with a southwest wind 10 to 16 mph, with gusts as high as 26 mph.

    High: 94 °F

    Mostly Sunny
    then Mostly
    Sunny and
    Breezy

  • Tuesday
    Night

    Tuesday Night: A 30 percent chance of showers and thunderstorms, mainly between 2am and 3am. Partly cloudy, with a low around 75. South southwest wind 10 to 13 mph, with gusts as high as 21 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 75 °F

    Chance
    T-storms



  • Wednesday

    Wednesday: Mostly sunny, with a high near 93. Heat index values as high as 100. Breezy, with a south southwest wind 9 to 16 mph, with gusts as high as 26 mph.

    High: 93 °F

    Mostly Sunny
    then Mostly
    Sunny and
    Breezy

  • Wednesday
    Night

    Wednesday Night: A slight chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Partly cloudy, with a low around 75. Breezy, with a south southwest wind 13 to 16 mph, with gusts as high as 26 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 75 °F

    Slight Chance
    T-storms and
    Breezy then
    Showers
    Likely

  • Thursday

    Thursday: A 30 percent chance of showers and thunderstorms, mainly before 1pm. Mostly sunny, with a high near 91. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 91 °F

    Chance
    T-storms



  • Thursday
    Night

    Thursday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Partly cloudy, with a low around 73. Chance of precipitation is 60%.

    Low: 73 °F

    Chance
    T-storms then
    Showers
    Likely

  • Friday

    Friday: A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 90.

    High: 90 °F

    Chance
    Showers then
    Chance
    T-storms

  • Friday
    Night

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

    Low: 72 °F

    Mostly Clear
    then Chance
    T-storms




    • Tonight: A 20 percent chance of showers and thunderstorms after 4am. Partly cloudy, with a low around 77. South southwest wind 11 to 15 mph, with gusts as high as 21 mph.

    Tuesday: Mostly sunny, with a high near 94. Heat index values as high as 105. Breezy, with a southwest wind 10 to 16 mph, with gusts as high as 26 mph.

    Tuesday Night: A 30 percent chance of showers and thunderstorms, mainly between 2am and 3am. Partly cloudy, with a low around 75. South southwest wind 10 to 13 mph, with gusts as high as 21 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Wednesday: Mostly sunny, with a high near 93. Heat index values as high as 100. Breezy, with a south southwest wind 9 to 16 mph, with gusts as high as 26 mph.

    Wednesday Night: A slight chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Partly cloudy, with a low around 75. Breezy, with a south southwest wind 13 to 16 mph, with gusts as high as 26 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Thursday: A 30 percent chance of showers and thunderstorms, mainly before 1pm. Mostly sunny, with a high near 91. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Thursday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Partly cloudy, with a low around 73. Chance of precipitation is 60%.

    Friday: A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 90.

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

    Independence Day: A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 89.

    Saturday Night: A 50 percent chance of showers and thunderstorms. Partly cloudy, with a low around 71.

    Sunday: A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 86.

    Sunday Night: Partly cloudy, with a low around 66.

    Monday: Mostly sunny, with a high near 85.


    Waterloo IA
     42.49°N 92.35°W

    Visit your local NWS office at: https://www.weather.gov/desmoines