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

84°F

29°C

Humidity 59%
Wind Speed S 20 G 26 mph
Barometer 29.97 in (1013.4 mb)
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Heat Index87°F (31°C)
Last update 15 Jul 12:53 pm CDT
Extended Forecast for

Chapin IA

  • This Afternoon

    This Afternoon: Sunny, with a high near 86. South wind 10 to 13 mph.

    High: 86 °F

    Sunny

  • Tonight

    Tonight: A slight chance of showers between 3am and 4am, then a chance of showers and thunderstorms after 4am. Increasing clouds, with a low around 67. South wind around 6 mph. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 67 °F

    Mostly Clear
    then Chance
    T-storms

  • Wednesday

    Wednesday: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 1pm. High near 78. South southwest wind 5 to 10 mph becoming northwest in the afternoon. Chance of precipitation is 80%. New rainfall amounts between three quarters and one inch possible.

    High: 78 °F

    Chance
    T-storms then
    T-storms

  • Wednesday Night

    Wednesday Night: Showers and thunderstorms likely before 10pm, then a chance of showers. Mostly cloudy, with a low around 55. North wind around 10 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 55 °F

    T-storms
    Likely then
    Chance
    Showers

  • Thursday

    Thursday: Partly sunny, with a high near 70. North wind 9 to 11 mph.

    High: 70 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 55.

    Low: 55 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 77.

    High: 77 °F

    Mostly Sunny

  • Friday Night

    Friday Night: A chance of showers, with thunderstorms also possible after 1am. Mostly cloudy, with a low around 63. Chance of precipitation is 50%.

    Low: 63 °F

    Chance
    Showers then
    Chance
    T-storms

  • Saturday

    Saturday: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 80.

    High: 80 °F

    Chance
    T-storms

Detailed Forecast

This Afternoon
Sunny, with a high near 86. South wind 10 to 13 mph.
Tonight
A slight chance of showers between 3am and 4am, then a chance of showers and thunderstorms after 4am. Increasing clouds, with a low around 67. South wind around 6 mph. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Wednesday
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 1pm. High near 78. South southwest wind 5 to 10 mph becoming northwest in the afternoon. Chance of precipitation is 80%. New rainfall amounts between three quarters and one inch possible.
Wednesday Night
Showers and thunderstorms likely before 10pm, then a chance of showers. Mostly cloudy, with a low around 55. North wind around 10 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Thursday
Partly sunny, with a high near 70. North wind 9 to 11 mph.
Thursday Night
Partly cloudy, with a low around 55.
Friday
Mostly sunny, with a high near 77.
Friday Night
A chance of showers, with thunderstorms also possible after 1am. Mostly cloudy, with a low around 63. Chance of precipitation is 50%.
Saturday
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 80.
Saturday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 64. Chance of precipitation is 30%.
Sunday
Partly sunny, with a high near 80.
Sunday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 64.
Monday
A 30 percent chance of showers. Partly sunny, with a high near 81.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Chapin IA
 42.84°N 93.23°W
Last Update:
12:42 pm CDT Jul 15, 2025
Forecast Valid:
1pm CDT Jul 15, 2025-6pm CDT Jul 21, 2025
 
Forecast Discussion
 
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Additional Resources

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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