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.

Fog

13°C

56°F

Humidity 100%
Wind Speed W 7 km/h
Barometer 1005.3 mb (29.72 in)
Dewpoint 13°C (56°F)
Visibility 0.40 km
Last update 16 May 3:53 am CDT
Extended Forecast for

Chapin IA

  • Today

    Today: Mostly sunny, with a high near 28. North northwest wind 5 to 11 km/h becoming east northeast in the afternoon.

    High: 28 °C

    Mostly Sunny

  • Tonight

    Tonight: A 50 percent chance of showers and thunderstorms, mainly after 8pm. Mostly cloudy, with a low around 14. East southeast wind 11 to 18 km/h. New rainfall amounts between 7.5 mm and 1 cm possible.

    Low: 14 °C

    Chance
    Showers then
    Chance
    T-storms

  • Sunday

    Sunday: Showers likely and possibly a thunderstorm before 8am, then a chance of showers and thunderstorms between 8am and 1pm. Mostly cloudy, with a high near 28. Windy, with a south wind 26 to 36 km/h increasing to 37 to 47 km/h in the afternoon. Winds could gust as high as 60 km/h. Chance of precipitation is 60%. New rainfall amounts between 2.5 and 5 mm possible.

    High: 28 °C

    Windy.
    Showers
    Likely then
    Chance
    T-storms

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 1am. Low around 16. Windy, with a south wind 40 to 45 km/h decreasing to 27 to 32 km/h after midnight. Winds could gust as high as 55 km/h. Chance of precipitation is 80%. New rainfall amounts between 7.5 mm and 1 cm possible.

    Low: 16 °C

    Windy. Chance
    T-storms then
    Showers

  • Monday

    Monday: Showers and possibly a thunderstorm. High near 28. Windy, with a south wind 26 to 34 km/h, with gusts as high as 42 km/h. Chance of precipitation is 90%. New rainfall amounts between 7.5 mm and 1 cm possible.

    High: 28 °C

    Showers and
    Windy

  • Monday Night

    Monday Night: Showers and possibly a thunderstorm before 4am, then showers likely. Low around 12. Windy. Chance of precipitation is 90%. New rainfall amounts between 2 and 3 cm possible.

    Low: 12 °C

    Showers and
    Windy

  • Tuesday

    Tuesday: Partly sunny, with a high near 18. Windy.

    High: 18 °C

    Partly Sunny
    and Windy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 5. Breezy.

    Low: 5 °C

    Mostly Cloudy
    and Breezy
    then Mostly
    Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 16.

    High: 16 °C

    Mostly Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 28. North northwest wind 5 to 11 km/h becoming east northeast in the afternoon.
Tonight
A 50 percent chance of showers and thunderstorms, mainly after 8pm. Mostly cloudy, with a low around 14. East southeast wind 11 to 18 km/h. New rainfall amounts between 7.5 mm and 1 cm possible.
Sunday
Showers likely and possibly a thunderstorm before 8am, then a chance of showers and thunderstorms between 8am and 1pm. Mostly cloudy, with a high near 28. Windy, with a south wind 26 to 36 km/h increasing to 37 to 47 km/h in the afternoon. Winds could gust as high as 60 km/h. Chance of precipitation is 60%. New rainfall amounts between 2.5 and 5 mm possible.
Sunday Night
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 1am. Low around 16. Windy, with a south wind 40 to 45 km/h decreasing to 27 to 32 km/h after midnight. Winds could gust as high as 55 km/h. Chance of precipitation is 80%. New rainfall amounts between 7.5 mm and 1 cm possible.
Monday
Showers and possibly a thunderstorm. High near 28. Windy, with a south wind 26 to 34 km/h, with gusts as high as 42 km/h. Chance of precipitation is 90%. New rainfall amounts between 7.5 mm and 1 cm possible.
Monday Night
Showers and possibly a thunderstorm before 4am, then showers likely. Low around 12. Windy. Chance of precipitation is 90%. New rainfall amounts between 2 and 3 cm possible.
Tuesday
Partly sunny, with a high near 18. Windy.
Tuesday Night
Mostly cloudy, with a low around 5. Breezy.
Wednesday
Mostly sunny, with a high near 16.
Wednesday Night
Partly cloudy, with a low around 4.
Thursday
Sunny, with a high near 19.
Thursday Night
Partly cloudy, with a low around 7.
Friday
Mostly sunny, with a high near 23.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Chapin IA
 42.84°N 93.23°W
Last Update:
2:44 am CDT May 16, 2026
Forecast Valid:
4am CDT May 16, 2026-6pm CDT May 22, 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