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.

Overcast

73°F

23°C

Humidity 76%
Wind Speed S 14 G 22 mph
Barometer 29.72 in (1005.3 mb)
Dewpoint 65°F (18°C)
Visibility 10.00 mi
Last update 13 Apr 1:53 pm CDT
Extended Forecast for

Chapin IA

  • This Afternoon

    This Afternoon: A 20 percent chance of showers and thunderstorms before 3pm. Mostly cloudy, with a high near 77. Windy, with a south wind 17 to 21 mph, with gusts as high as 25 mph.

    High: 77 °F

    Slight Chance
    T-storms and
    Windy

  • Tonight

    Tonight: A 30 percent chance of showers and thunderstorms, mainly before 8pm. Patchy fog after 5am. Otherwise, mostly cloudy, with a low around 55. Breezy, with a south wind 15 to 20 mph becoming west 7 to 12 mph after midnight. Winds could gust as high as 24 mph. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 55 °F

    Chance
    T-storms and
    Breezy then
    Patchy Fog

  • Tuesday

    Tuesday: A 50 percent chance of showers and thunderstorms after 1pm. Patchy fog before 9am. Otherwise, partly sunny, with a high near 76. Light north wind increasing to 5 to 9 mph in the morning. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 76 °F

    Patchy Fog
    then Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 51. North northeast wind 6 to 9 mph. Chance of precipitation is 50%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 51 °F

    Chance
    T-storms

  • Wednesday

    Wednesday: A chance of showers before 10am, then a chance of showers and thunderstorms between 10am and 1pm, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 71. Northeast wind 6 to 11 mph becoming south southeast in the afternoon. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

    High: 71 °F

    Chance
    Showers then
    Showers
    Likely

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 51. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 51 °F

    Chance
    T-storms then
    Chance
    Showers

  • Thursday

    Thursday: A 20 percent chance of showers. Sunny, with a high near 75.

    High: 75 °F

    Slight Chance
    Showers

  • Thursday Night

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

    Low: 55 °F

    Mostly Clear

  • Friday

    Friday: Showers likely and possibly a thunderstorm after 1pm. Mostly sunny, with a high near 78. Windy. Chance of precipitation is 60%.

    High: 78 °F

    Windy. Mostly
    Sunny then
    Showers
    Likely

Detailed Forecast

This Afternoon
A 20 percent chance of showers and thunderstorms before 3pm. Mostly cloudy, with a high near 77. Windy, with a south wind 17 to 21 mph, with gusts as high as 25 mph.
Tonight
A 30 percent chance of showers and thunderstorms, mainly before 8pm. Patchy fog after 5am. Otherwise, mostly cloudy, with a low around 55. Breezy, with a south wind 15 to 20 mph becoming west 7 to 12 mph after midnight. Winds could gust as high as 24 mph. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tuesday
A 50 percent chance of showers and thunderstorms after 1pm. Patchy fog before 9am. Otherwise, partly sunny, with a high near 76. Light north wind increasing to 5 to 9 mph in the morning. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tuesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 51. North northeast wind 6 to 9 mph. Chance of precipitation is 50%. New rainfall amounts between a quarter and half of an inch possible.
Wednesday
A chance of showers before 10am, then a chance of showers and thunderstorms between 10am and 1pm, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 71. Northeast wind 6 to 11 mph becoming south southeast in the afternoon. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Wednesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 51. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Thursday
A 20 percent chance of showers. Sunny, with a high near 75.
Thursday Night
Mostly clear, with a low around 55.
Friday
Showers likely and possibly a thunderstorm after 1pm. Mostly sunny, with a high near 78. Windy. Chance of precipitation is 60%.
Friday Night
Showers likely and possibly a thunderstorm before 1am, then a chance of showers. Mostly cloudy, with a low around 36. Windy. Chance of precipitation is 70%.
Saturday
A chance of rain and snow showers. Partly sunny, with a high near 50. Windy. Chance of precipitation is 30%.
Saturday Night
Mostly cloudy, with a low around 28. Windy.
Sunday
Sunny, with a high near 52.
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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:
1:27 pm CDT Apr 13, 2026
Forecast Valid:
2pm CDT Apr 13, 2026-6pm CDT Apr 19, 2026
 
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