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

Dangerous Heat and Possible Flooding

Dangerous heat will persist across the Southwest U.S. through Saturday with daytime highs of 110-115°F. Extreme Heat Warnings remain in effect. Dangerous heat will build across the southern Plains again beginning this weekend. Heavy to excessive rain over the Carolinas Friday may lead to isolated areas of flash flooding. Read More >

Hazardous Weather Conditions

Current conditions at

Mason City Municipal Airport (KMCW)

Lat: 43.15°NLon: 93.33°WElev: 1188ft.

Fair

52°F

11°C

Humidity 97%
Wind Speed Calm
Barometer 30.15 in (1020.2 mb)
Dewpoint 51°F (11°C)
Visibility 10.00 mi
Last update 28 Aug 6:53 am CDT
Extended Forecast for

Plymouth IA

  • Today

    Today: Sunny, with a high near 83. Calm wind becoming southwest around 5 mph in the afternoon.

    High: 83 °F

    Sunny

  • Tonight

    Tonight: A slight chance of showers, then a chance of showers and thunderstorms after 4am. Mostly cloudy, with a low around 65. South wind 6 to 9 mph. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 65 °F

    Partly Cloudy
    then Chance
    Showers

  • Saturday

    Saturday: Showers and thunderstorms, mainly before 11am. High near 82. Breezy, with a south wind 11 to 18 mph, with gusts as high as 28 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 82 °F

    Breezy.
    Showers then
    Slight Chance
    T-storms

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 69. South southeast wind 10 to 13 mph, with gusts as high as 20 mph.

    Low: 69 °F

    Partly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 89. South wind 10 to 13 mph, with gusts as high as 18 mph.

    High: 89 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: A 20 percent chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 71.

    Low: 71 °F

    Partly Cloudy
    then Slight
    Chance
    T-storms

  • Monday

    Monday: A 20 percent chance of showers before 1pm. Partly sunny, with a high near 89.

    High: 89 °F

    Slight Chance
    Showers

  • Monday Night

    Monday Night: A 20 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 68.

    Low: 68 °F

    Partly Cloudy
    then Slight
    Chance
    T-storms

  • Tuesday

    Tuesday: Mostly sunny, with a high near 86.

    High: 86 °F

    Mostly Sunny

Detailed Forecast

Today
Sunny, with a high near 83. Calm wind becoming southwest around 5 mph in the afternoon.
Tonight
A slight chance of showers, then a chance of showers and thunderstorms after 4am. Mostly cloudy, with a low around 65. South wind 6 to 9 mph. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Saturday
Showers and thunderstorms, mainly before 11am. High near 82. Breezy, with a south wind 11 to 18 mph, with gusts as high as 28 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Saturday Night
Partly cloudy, with a low around 69. South southeast wind 10 to 13 mph, with gusts as high as 20 mph.
Sunday
Partly sunny, with a high near 89. South wind 10 to 13 mph, with gusts as high as 18 mph.
Sunday Night
A 20 percent chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 71.
Monday
A 20 percent chance of showers before 1pm. Partly sunny, with a high near 89.
Monday Night
A 20 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 68.
Tuesday
Mostly sunny, with a high near 86.
Tuesday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 65. Chance of precipitation is 30%.
Wednesday
Mostly sunny, with a high near 87.
Wednesday Night
Partly cloudy, with a low around 68.
Thursday
Mostly sunny, with a high near 88.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Plymouth IA
 43.25°N 93.13°W
Last Update:
6:31 am CDT Aug 28, 2026
Forecast Valid:
8am CDT Aug 28, 2026-6pm CDT Sep 3, 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