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

Hazardous Weather Conditions

Current conditions at

Mason City Municipal Airport (KMCW)

Lat: 43.15°NLon: 93.33°WElev: 1188ft.

Fair

89°F

32°C

Humidity 65%
Wind Speed S 8 mph
Barometer 29.86 in (1009.6 mb)
Dewpoint 76°F (24°C)
Visibility 10.00 mi
Heat Index100°F (38°C)
Last update 26 Jul 2:53 pm CDT
Extended Forecast for

Plymouth IA

Heat Advisory July 26, 09:00pm until July 27, 10:00pm
Extreme Heat Warning until July 26, 09:00pm
Click here for hazard details and duration
Heat Advisory
Extreme Heat Warning
  •  
    Extreme Heat Warning until July 26, 09:00pm

    NOW until 9:00pm Sun

    Extreme Heat Warning

  • This Afternoon

    High: 92 °F

    Partly Sunny

  • Tonight

    Tonight: A slight chance of showers and thunderstorms between 10pm and 3am. Partly cloudy, with a low around 76. South wind around 9 mph. Chance of precipitation is 20%.

    Low: 76 °F

    Slight Chance
    T-storms

  • Monday

    Monday: Patchy smoke after 2pm. Sunny, with a high near 93. Heat index values as high as 108. Southwest wind 6 to 13 mph becoming north northwest in the afternoon. Winds could gust as high as 20 mph.

    High: 93 °F

    Sunny then
    Patchy Smoke

  • Monday Night

    Monday Night: Increasing clouds, with a low around 68. North northwest wind 5 to 10 mph.

    Low: 68 °F

    Increasing
    Clouds

  • Tuesday

    Tuesday: Mostly sunny, with a high near 86. Light east northeast wind.

    High: 86 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 65.

    Low: 65 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 86.

    High: 86 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 66.

    Low: 66 °F

    Mostly Clear

Detailed Forecast

This Afternoon
Partly sunny, with a high near 92. Heat index values as high as 112. South wind around 9 mph.
Tonight
A slight chance of showers and thunderstorms between 10pm and 3am. Partly cloudy, with a low around 76. South wind around 9 mph. Chance of precipitation is 20%.
Monday
Patchy smoke after 2pm. Sunny, with a high near 93. Heat index values as high as 108. Southwest wind 6 to 13 mph becoming north northwest in the afternoon. Winds could gust as high as 20 mph.
Monday Night
Increasing clouds, with a low around 68. North northwest wind 5 to 10 mph.
Tuesday
Mostly sunny, with a high near 86. Light east northeast wind.
Tuesday Night
Mostly clear, with a low around 65.
Wednesday
Sunny, with a high near 86.
Wednesday Night
Mostly clear, with a low around 66.
Thursday
A 30 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 85.
Thursday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 66. Chance of precipitation is 70%.
Friday
A 50 percent chance of showers. Partly sunny, with a high near 80.
Friday Night
Mostly clear, with a low around 63.
Saturday
Sunny, with a high near 82.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Plymouth IA
 43.25°N 93.13°W
Last Update:
2:31 pm CDT Jul 26, 2026
Forecast Valid:
3pm CDT Jul 26, 2026-6pm CDT Aug 1, 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