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

71°F

22°C

Humidity 79%
Wind Speed NE 16 G 26 mph
Barometer 29.90 in (1011.3 mb)
Dewpoint 64°F (18°C)
Visibility 8.00 mi
Last update 13 Aug 12:53 pm CDT
Extended Forecast for

Sheffield IA

Flood Watch until August 14, 01:00pm
Click here for hazard details and duration
Flood Watch
  •  
    Flood Watch until August 14, 01:00pm

    NOW until 1:00pm Fri

    Flood Watch

  • This Afternoon

    High: 73 °F

    Showers
    Likely

  • Tonight

    Tonight: Showers and thunderstorms likely, mainly before 10pm, then showers likely and possibly a thunderstorm after 2am. Mostly cloudy, with a low around 63. East wind 9 to 11 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 63 °F

    Showers
    Likely

  • Friday

    Friday: Showers and possibly a thunderstorm before 11am, then a chance of showers and thunderstorms between 11am and 2pm, then showers likely and possibly a thunderstorm after 2pm. High near 77. East wind 11 to 14 mph, with gusts as high as 21 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    High: 77 °F

    Showers

  • Friday Night

    Friday Night: Showers and thunderstorms before 4am, then a chance of showers between 4am and 5am, then showers and possibly a thunderstorm after 5am. Some of the storms could produce heavy rainfall. Low around 66. East southeast wind 7 to 13 mph, with gusts as high as 18 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 66 °F

    Heavy Rain

  • Saturday

    Saturday: Showers and possibly a thunderstorm before 7am, then a chance of showers between 7am and 4pm, then a chance of showers and thunderstorms after 4pm. High near 84. South southeast wind around 6 mph becoming west in the afternoon. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 84 °F

    Showers then
    Chance
    Showers

  • Saturday Night

    Saturday Night: Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 66. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 66 °F

    Showers
    Likely

  • Sunday

    Sunday: A 20 percent chance of showers before 1pm. Partly sunny, with a high near 79.

    High: 79 °F

    Slight Chance
    Showers

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 59.

    Low: 59 °F

    Mostly Clear

Detailed Forecast

This Afternoon
Showers likely and possibly a thunderstorm before 3pm, then a chance of showers and thunderstorms between 3pm and 4pm, then showers likely and possibly a thunderstorm after 4pm. Mostly cloudy, with a high near 73. East wind 9 to 11 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tonight
Showers and thunderstorms likely, mainly before 10pm, then showers likely and possibly a thunderstorm after 2am. Mostly cloudy, with a low around 63. East wind 9 to 11 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Friday
Showers and possibly a thunderstorm before 11am, then a chance of showers and thunderstorms between 11am and 2pm, then showers likely and possibly a thunderstorm after 2pm. High near 77. East wind 11 to 14 mph, with gusts as high as 21 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Friday Night
Showers and thunderstorms before 4am, then a chance of showers between 4am and 5am, then showers and possibly a thunderstorm after 5am. Some of the storms could produce heavy rainfall. Low around 66. East southeast wind 7 to 13 mph, with gusts as high as 18 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Saturday
Showers and possibly a thunderstorm before 7am, then a chance of showers between 7am and 4pm, then a chance of showers and thunderstorms after 4pm. High near 84. South southeast wind around 6 mph becoming west in the afternoon. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Saturday Night
Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 66. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Sunday
A 20 percent chance of showers before 1pm. Partly sunny, with a high near 79.
Sunday Night
Mostly clear, with a low around 59.
Monday
Sunny, with a high near 77.
Monday Night
Mostly clear, with a low around 58.
Tuesday
A 30 percent chance of showers. Mostly sunny, with a high near 79.
Tuesday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 61.
Wednesday
A 30 percent chance of showers. Partly sunny, with a high near 78.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Sheffield IA
 42.89°N 93.23°W
Last Update:
12:02 pm CDT Aug 13, 2026
Forecast Valid:
1pm CDT Aug 13, 2026-6pm CDT Aug 19, 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