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

69°F

21°C

Humidity 96%
Wind Speed S 5 mph
Barometer 29.90 in (1011.4 mb)
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Last update 19 Jul 7:53 am CDT
Extended Forecast for

Chapin IA

  • Today

    Today: A 50 percent chance of showers and thunderstorms, mainly before 11am. Partly sunny, with a high near 80. South wind 5 to 7 mph becoming north in the afternoon. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 80 °F

    Chance
    T-storms then
    Partly Sunny

  • Tonight

    Tonight: A 30 percent chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 63. North wind around 6 mph becoming east northeast after midnight. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 63 °F

    Chance
    T-storms

  • Sunday

    Sunday: A slight chance of showers and thunderstorms before 7am, then a slight chance of showers between 7am and 4pm, then a slight chance of showers and thunderstorms after 4pm. Mostly cloudy, with a high near 76. East wind 6 to 10 mph. Chance of precipitation is 20%.

    High: 76 °F

    Slight Chance
    T-storms

  • Sunday Night

    Sunday Night: A slight chance of showers and thunderstorms, then a chance of showers after 7pm. Mostly cloudy, with a low around 63. East wind 8 to 10 mph. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 63 °F

    Slight Chance
    T-storms then
    Chance
    Showers

  • Monday

    Monday: Mostly cloudy, with a high near 79. Southeast wind around 11 mph.

    High: 79 °F

    Mostly Cloudy

  • Monday Night

    Monday Night: A 20 percent chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 69.

    Low: 69 °F

    Mostly Cloudy
    then Slight
    Chance
    T-storms

  • Tuesday

    Tuesday: A 30 percent chance of showers and thunderstorms, mainly before 1pm. Partly sunny, with a high near 87.

    High: 87 °F

    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 72.

    Low: 72 °F

    Chance
    T-storms

  • Wednesday

    Wednesday: Sunny, with a high near 88.

    High: 88 °F

    Sunny

Detailed Forecast

Today
A 50 percent chance of showers and thunderstorms, mainly before 11am. Partly sunny, with a high near 80. South wind 5 to 7 mph becoming north in the afternoon. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tonight
A 30 percent chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 63. North wind around 6 mph becoming east northeast after midnight. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Sunday
A slight chance of showers and thunderstorms before 7am, then a slight chance of showers between 7am and 4pm, then a slight chance of showers and thunderstorms after 4pm. Mostly cloudy, with a high near 76. East wind 6 to 10 mph. Chance of precipitation is 20%.
Sunday Night
A slight chance of showers and thunderstorms, then a chance of showers after 7pm. Mostly cloudy, with a low around 63. East wind 8 to 10 mph. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Monday
Mostly cloudy, with a high near 79. Southeast wind around 11 mph.
Monday Night
A 20 percent chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 69.
Tuesday
A 30 percent chance of showers and thunderstorms, mainly before 1pm. Partly sunny, with a high near 87.
Tuesday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 72.
Wednesday
Sunny, with a high near 88.
Wednesday Night
A 40 percent chance of showers. Partly cloudy, with a low around 69.
Thursday
A 30 percent chance of showers. Mostly sunny, with a high near 84.
Thursday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 68.
Friday
Mostly sunny, with a high near 86.
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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:
8:05 am CDT Jul 19, 2025
Forecast Valid:
8am CDT Jul 19, 2025-6pm CDT Jul 25, 2025
 
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