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Hazardous Weather Conditions

Current conditions at

Mason City Municipal Airport (KMCW)

Lat: 43.15°NLon: 93.33°WElev: 1188ft.

Mostly Cloudy

74°F

23°C

Humidity 91%
Wind Speed SE 17 mph
Barometer 29.82 in (1008.6 mb)
Dewpoint 71°F (22°C)
Visibility 10.00 mi
Last update 20 Jul 10:53 am CDT
Extended Forecast for

Sheffield IA

Heat Advisory July 20, 12:00pm until July 20, 08:00pm
Click here for hazard details and duration
Heat Advisory

  • Today

    Today: A 40 percent chance of showers and thunderstorms, mainly after 4pm. Some of the storms could be severe. Mostly sunny, with a high near 91. Heat index values as high as 105. South southwest wind 8 to 14 mph, with gusts as high as 22 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 91 °F

    Severe
    Thunderstorms

  • Tonight

    Tonight: A 30 percent chance of showers and thunderstorms, mainly before 9pm. Some of the storms could be severe. Patchy smoke. Partly cloudy, with a low around 67. West wind around 9 mph becoming north northwest after midnight. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 67 °F

    Severe
    Thunderstorms
    then Areas
    Smoke

  • Tuesday

    Tuesday: Patchy smoke between 2pm and 4pm. Sunny, with a high near 80. Breezy, with a north northwest wind 13 to 20 mph, with gusts as high as 28 mph.

    High: 80 °F

    Patchy Smoke
    and Breezy

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 56. North northwest wind 5 to 14 mph, with gusts as high as 20 mph.

    Low: 56 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 77. Light north wind.

    High: 77 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 55.

    Low: 55 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 79.

    High: 79 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: A 20 percent chance of showers after 1am. Mostly cloudy, with a low around 59.

    Low: 59 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Friday

    Friday: Mostly sunny, with a high near 79.

    High: 79 °F

    Mostly Sunny

Detailed Forecast

Today
A 40 percent chance of showers and thunderstorms, mainly after 4pm. Some of the storms could be severe. Mostly sunny, with a high near 91. Heat index values as high as 105. South southwest wind 8 to 14 mph, with gusts as high as 22 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tonight
A 30 percent chance of showers and thunderstorms, mainly before 9pm. Some of the storms could be severe. Patchy smoke. Partly cloudy, with a low around 67. West wind around 9 mph becoming north northwest after midnight. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tuesday
Patchy smoke between 2pm and 4pm. Sunny, with a high near 80. Breezy, with a north northwest wind 13 to 20 mph, with gusts as high as 28 mph.
Tuesday Night
Mostly clear, with a low around 56. North northwest wind 5 to 14 mph, with gusts as high as 20 mph.
Wednesday
Sunny, with a high near 77. Light north wind.
Wednesday Night
Mostly clear, with a low around 55.
Thursday
Mostly sunny, with a high near 79.
Thursday Night
A 20 percent chance of showers after 1am. Mostly cloudy, with a low around 59.
Friday
Mostly sunny, with a high near 79.
Friday Night
Mostly clear, with a low around 60.
Saturday
Sunny, with a high near 85.
Saturday Night
Mostly clear, with a low around 66.
Sunday
Mostly sunny, with a high near 92.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Sheffield IA
 42.89°N 93.23°W
Last Update:
10:47 am CDT Jul 20, 2026
Forecast Valid:
11am CDT Jul 20, 2026-6pm CDT Jul 26, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation