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

1°F

-17°C

Humidity 79%
Wind Speed SW 7 mph
Barometer 29.95 in (1016.7 mb)
Dewpoint -4°F (-20°C)
Visibility 10.00 mi
Wind Chill-12°F (-24°C)
Last update 18 Jan 4:53 am CST
Extended Forecast for

Chapin IA

Cold Weather Advisory January 18, 09:00pm until January 19, 12:00pm
Winter Weather Advisory January 18, 12:00pm until January 18, 09:00pm
Click here for hazard details and duration
Cold Weather Advisory
Winter Weather Advisory

  • Today

    Today: A 40 percent chance of snow, mainly between 7am and 5pm. Patchy blowing snow after 2pm. Cloudy, with a high near 19. Wind chill values as low as -10. Windy, with a south southwest wind 8 to 13 mph becoming northwest 20 to 30 mph in the afternoon. Winds could gust as high as 39 mph. Total daytime snow accumulation of less than a half inch possible.

    High: 19 °F

    Chance Snow
    and Patchy
    Blowing Snow

  • Tonight

    Tonight: A 20 percent chance of snow before 7pm. Patchy blowing snow. Mostly cloudy, with a low around -5. Wind chill values as low as -30. Windy, with a northwest wind 21 to 31 mph, with gusts as high as 40 mph.

    Low: -5 °F

    Slight Chance
    Snow and
    Patchy
    Blowing Snow

  • M.L.King Day

    M.L.King Day: Mostly sunny and cold, with a high near 7. Wind chill values as low as -30. Blustery, with a northwest wind 15 to 20 mph decreasing to 9 to 14 mph in the afternoon. Winds could gust as high as 24 mph.

    High: 7 °F

    Cold and
    Blustery

  • Monday Night

    Monday Night: Partly cloudy, with a low around -2. Wind chill values as low as -10. West wind around 7 mph.

    Low: -2 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 20. West southwest wind 6 to 8 mph becoming south southeast in the afternoon.

    High: 20 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A 20 percent chance of snow before midnight. Mostly cloudy, with a low around 13.

    Low: 13 °F

    Slight Chance
    Snow then
    Mostly Cloudy

  • Wednesday

    Wednesday: A 20 percent chance of snow after noon. Partly sunny, with a high near 23. Blustery.

    High: 23 °F

    Partly Sunny
    then Slight
    Chance Snow
    and Blustery

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 4.

    Low: 4 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 22.

    High: 22 °F

    Mostly Sunny

Detailed Forecast

Today
A 40 percent chance of snow, mainly between 7am and 5pm. Patchy blowing snow after 2pm. Cloudy, with a high near 19. Wind chill values as low as -10. Windy, with a south southwest wind 8 to 13 mph becoming northwest 20 to 30 mph in the afternoon. Winds could gust as high as 39 mph. Total daytime snow accumulation of less than a half inch possible.
Tonight
A 20 percent chance of snow before 7pm. Patchy blowing snow. Mostly cloudy, with a low around -5. Wind chill values as low as -30. Windy, with a northwest wind 21 to 31 mph, with gusts as high as 40 mph.
M.L.King Day
Mostly sunny and cold, with a high near 7. Wind chill values as low as -30. Blustery, with a northwest wind 15 to 20 mph decreasing to 9 to 14 mph in the afternoon. Winds could gust as high as 24 mph.
Monday Night
Partly cloudy, with a low around -2. Wind chill values as low as -10. West wind around 7 mph.
Tuesday
Mostly sunny, with a high near 20. West southwest wind 6 to 8 mph becoming south southeast in the afternoon.
Tuesday Night
A 20 percent chance of snow before midnight. Mostly cloudy, with a low around 13.
Wednesday
A 20 percent chance of snow after noon. Partly sunny, with a high near 23. Blustery.
Wednesday Night
Partly cloudy, with a low around 4.
Thursday
Mostly sunny, with a high near 22.
Thursday Night
Mostly cloudy, with a low around 8.
Friday
Mostly cloudy, with a high near 15.
Friday Night
Mostly cloudy, with a low around -5.
Saturday
Partly sunny and cold, with a high near 2.
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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:
4:52 am CST Jan 18, 2026
Forecast Valid:
5am CST Jan 18, 2026-6pm CST Jan 24, 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