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

2°F

-17°C

Humidity 80%
Wind Speed NW 8 mph
Barometer 30.59 in (1038.5 mb)
Dewpoint -3°F (-19°C)
Visibility 10.00 mi
Wind Chill-12°F (-24°C)
Last update 23 Feb 6:53 am CST
Extended Forecast for

Clear Lake IA

  • Today

    Today: Sunny, with a high near 21. Wind chill values as low as -10. North northwest wind 5 to 8 mph becoming light and variable.

    High: 21 °F

    Sunny

  • Tonight

    Tonight: Partly cloudy, with a temperature falling to near 12 by 9pm, then rising to around 18 during the remainder of the night. Wind chill values as low as zero. Breezy, with a south wind 8 to 16 mph, with gusts as high as 22 mph.

    Low: 12 °F⇑

    Partly Cloudy
    then Mostly
    Cloudy and
    Breezy

  • Tuesday

    Tuesday: Partly sunny, with a high near 42. Wind chill values as low as 5. Breezy, with a south wind 15 to 20 mph becoming northwest in the afternoon. Winds could gust as high as 25 mph.

    High: 42 °F

    Partly Sunny
    and Breezy

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 14. Wind chill values as low as 5. Blustery, with a northwest wind 11 to 18 mph, with gusts as high as 24 mph.

    Low: 14 °F

    Partly Cloudy
    and Blustery
    then Mostly
    Clear

  • Wednesday

    Wednesday: A 30 percent chance of snow after noon. Mostly sunny, with a high near 27. Northwest wind 6 to 10 mph becoming south southeast in the afternoon. Little or no snow accumulation expected.

    High: 27 °F

    Sunny then
    Chance Snow

  • Wednesday Night

    Wednesday Night: A 50 percent chance of snow. The snow could be heavy at times. Mostly cloudy, with a low around 17.

    Low: 17 °F

    Heavy Snow

  • Thursday

    Thursday: Mostly sunny, with a high near 35.

    High: 35 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 24.

    Low: 24 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 49.

    High: 49 °F

    Sunny

Detailed Forecast

Today
Sunny, with a high near 21. Wind chill values as low as -10. North northwest wind 5 to 8 mph becoming light and variable.
Tonight
Partly cloudy, with a temperature falling to near 12 by 9pm, then rising to around 18 during the remainder of the night. Wind chill values as low as zero. Breezy, with a south wind 8 to 16 mph, with gusts as high as 22 mph.
Tuesday
Partly sunny, with a high near 42. Wind chill values as low as 5. Breezy, with a south wind 15 to 20 mph becoming northwest in the afternoon. Winds could gust as high as 25 mph.
Tuesday Night
Mostly clear, with a low around 14. Wind chill values as low as 5. Blustery, with a northwest wind 11 to 18 mph, with gusts as high as 24 mph.
Wednesday
A 30 percent chance of snow after noon. Mostly sunny, with a high near 27. Northwest wind 6 to 10 mph becoming south southeast in the afternoon. Little or no snow accumulation expected.
Wednesday Night
A 50 percent chance of snow. The snow could be heavy at times. Mostly cloudy, with a low around 17.
Thursday
Mostly sunny, with a high near 35.
Thursday Night
Mostly clear, with a low around 24.
Friday
Sunny, with a high near 49.
Friday Night
Partly cloudy, with a low around 20.
Saturday
Partly sunny, with a high near 33. Breezy.
Saturday Night
Partly cloudy, with a low around 12.
Sunday
A 30 percent chance of snow. Partly sunny, with a high near 27.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Clear Lake IA
 43.13°N 93.37°W
Last Update:
6:36 am CST Feb 23, 2026
Forecast Valid:
7am CST Feb 23, 2026-6pm CST Mar 1, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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