National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

Mason City Municipal Airport (KMCW)

Lat: 43.15°NLon: 93.33°WElev: 1188ft.

Fair

4°F

-16°C

Humidity 76%
Wind Speed N 14 mph
Barometer 30.23 in (1025.7 mb)
Dewpoint -2°F (-19°C)
Visibility 10.00 mi
Wind Chill-14°F (-26°C)
Last update 7 Dec 7:53 am CST
Extended Forecast for

Clear Lake IA

  • Today

    Today: Sunny and cold, with a high near 10. Wind chill values as low as -10. North wind 5 to 11 mph.

    High: 10 °F

    Cold

  • Tonight

    Tonight: A 40 percent chance of snow, mainly between 11pm and 5am. Increasing clouds, with a temperature rising to around 8 by 5am. Wind chill values as low as -10. Light and variable wind becoming south southeast 5 to 8 mph after midnight. New snow accumulation of less than a half inch possible.

    Low: 2 °F⇑

    Chance Snow

  • Monday

    Monday: Mostly cloudy, with a high near 26. Wind chill values as low as -5. South wind 9 to 14 mph, with gusts as high as 21 mph.

    High: 26 °F

    Mostly Cloudy

  • Monday Night

    Monday Night: Cloudy, then gradually becoming partly cloudy, with a steady temperature around 24. South wind 10 to 14 mph becoming west after midnight. Winds could gust as high as 21 mph.

    Low: 24 °F

    Decreasing
    Clouds

  • Tuesday

    Tuesday: A 30 percent chance of rain after noon. Mostly cloudy, with a high near 38. West wind 9 to 15 mph becoming south in the afternoon. Winds could gust as high as 22 mph.

    High: 38 °F

    Mostly Cloudy
    then Chance
    Rain

  • Tuesday Night

    Tuesday Night: A 40 percent chance of rain before midnight. Mostly cloudy, with a low around 18. Windy. New precipitation amounts of less than a tenth of an inch possible.

    Low: 18 °F

    Windy. Chance
    Rain then
    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 26. Windy.

    High: 26 °F

    Mostly Cloudy
    and Windy

  • Wednesday Night

    Wednesday Night: A 20 percent chance of snow after midnight. Mostly cloudy, with a low around 8.

    Low: 8 °F

    Mostly Cloudy
    then Slight
    Chance Snow

  • Thursday

    Thursday: A 30 percent chance of snow. Mostly cloudy, with a high near 16.

    High: 16 °F

    Chance Snow

Detailed Forecast

Today
Sunny and cold, with a high near 10. Wind chill values as low as -10. North wind 5 to 11 mph.
Tonight
A 40 percent chance of snow, mainly between 11pm and 5am. Increasing clouds, with a temperature rising to around 8 by 5am. Wind chill values as low as -10. Light and variable wind becoming south southeast 5 to 8 mph after midnight. New snow accumulation of less than a half inch possible.
Monday
Mostly cloudy, with a high near 26. Wind chill values as low as -5. South wind 9 to 14 mph, with gusts as high as 21 mph.
Monday Night
Cloudy, then gradually becoming partly cloudy, with a steady temperature around 24. South wind 10 to 14 mph becoming west after midnight. Winds could gust as high as 21 mph.
Tuesday
A 30 percent chance of rain after noon. Mostly cloudy, with a high near 38. West wind 9 to 15 mph becoming south in the afternoon. Winds could gust as high as 22 mph.
Tuesday Night
A 40 percent chance of rain before midnight. Mostly cloudy, with a low around 18. Windy. New precipitation amounts of less than a tenth of an inch possible.
Wednesday
Mostly cloudy, with a high near 26. Windy.
Wednesday Night
A 20 percent chance of snow after midnight. Mostly cloudy, with a low around 8.
Thursday
A 30 percent chance of snow. Mostly cloudy, with a high near 16.
Thursday Night
Mostly cloudy, with a low around -5. Blustery.
Friday
Partly sunny and cold, with a high near 4. Blustery.
Friday Night
Mostly cloudy, with a low around -11.
Saturday
Mostly cloudy and cold, with a high near 4.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Clear Lake IA
 43.13°N 93.37°W
Last Update:
6:42 am CST Dec 7, 2025
Forecast Valid:
8am CST Dec 7, 2025-6pm CST Dec 13, 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