Severe Thunderstorms and Heavy Rain Across the Ohio Valley;

Severe thunderstorms with damaging wind gusts will be possible from the mid-Mississippi Valley into parts of the Ohio Valley and central Appalachians. Heavy rain associated with these storms may lead to considerable flash and urban flooding impacts across portions of the Ohio Valley. Mid-summer heat persists from the Central Plains to the Southeast. Read More >

Hazardous Weather Conditions

Current conditions at

Mason City Municipal Airport (KMCW)

Lat: 43.15°NLon: 93.33°WElev: 1188ft.

Overcast

72°F

22°C

Humidity 97%
Wind Speed SE 8 mph
Barometer 29.85 in (1009.4 mb)
Dewpoint 71°F (22°C)
Visibility 7.00 mi
Last update 11 Aug 7:53 am CDT
Extended Forecast for

Mason City IA

  • Today

    Today: A chance of showers and thunderstorms before 10am, then a slight chance of showers between 10am and 11am. Some of the storms could produce heavy rainfall.  Partly sunny, with a high near 83. East southeast wind around 6 mph becoming light and variable  in the afternoon.  Chance of precipitation is 50%. New precipitation amounts between a half and three quarters of an inch possible.

    High: 83 °F

    Heavy Rain
    then Partly
    Sunny

  • Tonight

    Tonight: A 20 percent chance of showers and thunderstorms after 4am.  Increasing clouds, with a low around 66. Light east wind.

    Low: 66 °F

    Partly Cloudy
    then Slight
    Chance
    T-storms

  • Wednesday

    Wednesday: A slight chance of showers and thunderstorms before 7am, then a slight chance of showers between 7am and 8am.  Cloudy, then gradually becoming mostly sunny, with a high near 82. Calm wind becoming northeast around 5 mph.  Chance of precipitation is 20%.

    High: 82 °F

    Slight Chance
    T-storms then
    Partly Sunny

  • Wednesday Night

    Wednesday Night: A 30 percent chance of showers and thunderstorms after 1am.  Mostly cloudy, with a low around 66. Light north northeast wind.  New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 66 °F

    Partly Cloudy
    then Chance
    Showers

  • Thursday

    Thursday: A chance of showers and thunderstorms before 10am, then a chance of showers between 10am and 1pm, then a slight chance of showers and thunderstorms after 1pm.  Mostly cloudy, with a high near 78. Calm wind becoming east around 6 mph in the morning.  Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 78 °F

    Chance
    Showers

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 62.

    Low: 62 °F

    Mostly Cloudy

  • Friday

    Friday: A slight chance of showers, then a chance of showers and thunderstorms after 1pm.  Mostly cloudy, with a high near 74. Chance of precipitation is 50%.

    High: 74 °F

    Slight Chance
    Showers then
    Chance
    Showers

  • Friday Night

    Friday Night: Showers and possibly a thunderstorm.  Low around 62. Chance of precipitation is 80%.

    Low: 62 °F

    Showers

  • Saturday

    Saturday: Showers likely, with thunderstorms also possible after 1pm.  Mostly cloudy, with a high near 77. Chance of precipitation is 60%.

    High: 77 °F

    Showers
    Likely

Detailed Forecast

Today
A chance of showers and thunderstorms before 10am, then a slight chance of showers between 10am and 11am. Some of the storms could produce heavy rainfall. Partly sunny, with a high near 83. East southeast wind around 6 mph becoming light and variable in the afternoon. Chance of precipitation is 50%. New precipitation amounts between a half and three quarters of an inch possible.
Tonight
A 20 percent chance of showers and thunderstorms after 4am. Increasing clouds, with a low around 66. Light east wind.
Wednesday
A slight chance of showers and thunderstorms before 7am, then a slight chance of showers between 7am and 8am. Cloudy, then gradually becoming mostly sunny, with a high near 82. Calm wind becoming northeast around 5 mph. Chance of precipitation is 20%.
Wednesday Night
A 30 percent chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 66. Light north northeast wind. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Thursday
A chance of showers and thunderstorms before 10am, then a chance of showers between 10am and 1pm, then a slight chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 78. Calm wind becoming east around 6 mph in the morning. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Thursday Night
Mostly cloudy, with a low around 62.
Friday
A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 74. Chance of precipitation is 50%.
Friday Night
Showers and possibly a thunderstorm. Low around 62. Chance of precipitation is 80%.
Saturday
Showers likely, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 77. Chance of precipitation is 60%.
Saturday Night
Showers likely, mainly before 1am. Mostly cloudy, with a low around 63. Chance of precipitation is 60%.
Sunday
Mostly cloudy, with a high near 75.
Sunday Night
Partly cloudy, with a low around 59.
Monday
Mostly sunny, with a high near 75.
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ABOUT THIS FORECAST

 
Point Forecast:
Mason City IA
 43.15°N 93.19°W
6:02 am CDT Aug 11, 2026
8am CDT Aug 11, 2026-6pm CDT Aug 17, 2026
 
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Additional Resources

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Hourly Weather Forecast

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