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

28°F

-2°C

Humidity 75%
Wind Speed SW 12 mph
Barometer 30.25 in (1025.9 mb)
Dewpoint 21°F (-6°C)
Visibility 10.00 mi
Wind Chill18°F (-8°C)
Last update 11 Jan 4:53 pm CST
Extended Forecast for

Clear Lake IA

  • Tonight

    Tonight: Increasing clouds, with a low around 25. South southwest wind 8 to 15 mph becoming west northwest after midnight. Winds could gust as high as 24 mph.

    Low: 25 °F

    Increasing
    Clouds

  • Monday

    Monday: Patchy fog before 8am. Patchy freezing fog between 8am and 9am. Otherwise, mostly sunny, with a high near 41. West southwest wind 7 to 10 mph.

    High: 41 °F

    Patchy
    Freezing Fog
    and Patchy
    Fog then
    Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a steady temperature around 35. West southwest wind 8 to 14 mph, with gusts as high as 20 mph.

    Low: 35 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 44. Breezy, with a west northwest wind 16 to 20 mph, with gusts as high as 28 mph.

    High: 44 °F

    Mostly Sunny
    and Breezy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 21. Windy, with a northwest wind 18 to 28 mph, with gusts as high as 34 mph.

    Low: 21 °F

    Mostly Cloudy
    and Windy

  • Wednesday

    Wednesday: Partly sunny, with a high near 24. Windy.

    High: 24 °F

    Partly Sunny
    and Windy

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 12. Blustery.

    Low: 12 °F

    Mostly Clear
    and Blustery
    then Mostly
    Clear

  • Thursday

    Thursday: A 30 percent chance of snow after noon. Mostly cloudy, with a high near 29.

    High: 29 °F

    Partly Sunny
    then Chance
    Snow

  • Thursday Night

    Thursday Night: A 50 percent chance of snow. Mostly cloudy, with a low around 23.

    Low: 23 °F

    Chance Snow

Detailed Forecast

Tonight
Increasing clouds, with a low around 25. South southwest wind 8 to 15 mph becoming west northwest after midnight. Winds could gust as high as 24 mph.
Monday
Patchy fog before 8am. Patchy freezing fog between 8am and 9am. Otherwise, mostly sunny, with a high near 41. West southwest wind 7 to 10 mph.
Monday Night
Mostly cloudy, with a steady temperature around 35. West southwest wind 8 to 14 mph, with gusts as high as 20 mph.
Tuesday
Mostly sunny, with a high near 44. Breezy, with a west northwest wind 16 to 20 mph, with gusts as high as 28 mph.
Tuesday Night
Mostly cloudy, with a low around 21. Windy, with a northwest wind 18 to 28 mph, with gusts as high as 34 mph.
Wednesday
Partly sunny, with a high near 24. Windy.
Wednesday Night
Mostly clear, with a low around 12. Blustery.
Thursday
A 30 percent chance of snow after noon. Mostly cloudy, with a high near 29.
Thursday Night
A 50 percent chance of snow. Mostly cloudy, with a low around 23.
Friday
Snow likely, mainly after noon. Mostly cloudy, with a high near 30. Blustery. Chance of precipitation is 60%.
Friday Night
Mostly cloudy, with a low around 8. Blustery.
Saturday
Partly sunny, with a high near 16. Blustery.
Saturday Night
Partly cloudy, with a low around 5.
Sunday
Partly sunny, with a high near 22.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Clear Lake IA
 43.13°N 93.37°W
Last Update:
3:16 pm CST Jan 11, 2026
Forecast Valid:
5pm CST Jan 11, 2026-6pm CST Jan 18, 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