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.

Overcast

60°F

16°C

Humidity 62%
Wind Speed NW 8 mph
Barometer 29.96 in (1014.1 mb)
Dewpoint 47°F (8°C)
Visibility 10.00 mi
Last update 13 Oct 7:53 pm CDT
Extended Forecast for

Clear Lake IA

  • Tonight

    Tonight: Partly cloudy, with a low around 45. North wind around 9 mph.

    Low: 45 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Increasing clouds, with a high near 63. North northeast wind 8 to 10 mph.

    High: 63 °F

    Increasing
    Clouds

  • Wednesday Night

    Wednesday Night: A 30 percent chance of showers after 4am. Mostly cloudy, with a low around 46. East northeast wind around 6 mph. New precipitation amounts of less than a tenth of an inch possible.

    Low: 46 °F

    Mostly Cloudy
    then Chance
    Showers

  • Thursday

    Thursday: Showers. High near 60. East wind 5 to 9 mph becoming north northwest in the afternoon. Chance of precipitation is 90%. New precipitation amounts between a half and three quarters of an inch possible.

    High: 60 °F

    Showers

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 38. Windy, with a northwest wind 11 to 21 mph, with gusts as high as 28 mph.

    Low: 38 °F

    Mostly Cloudy
    and Windy

  • Friday

    Friday: Mostly sunny, with a high near 55. Windy.

    High: 55 °F

    Mostly Sunny
    and Windy

  • Friday Night

    Friday Night: Widespread frost, mainly after 4am. Otherwise, clear, with a low around 32.

    Low: 32 °F

    Clear then
    Frost

  • Saturday

    Saturday: Widespread frost, mainly before 8am. Otherwise, sunny, with a high near 60. Breezy.

    High: 60 °F

    Frost then
    Sunny and
    Breezy

  • Saturday Night

    Saturday Night: Clear, with a low around 40.

    Low: 40 °F

    Clear

Detailed Forecast

Tonight
Partly cloudy, with a low around 45. North wind around 9 mph.
Wednesday
Increasing clouds, with a high near 63. North northeast wind 8 to 10 mph.
Wednesday Night
A 30 percent chance of showers after 4am. Mostly cloudy, with a low around 46. East northeast wind around 6 mph. New precipitation amounts of less than a tenth of an inch possible.
Thursday
Showers. High near 60. East wind 5 to 9 mph becoming north northwest in the afternoon. Chance of precipitation is 90%. New precipitation amounts between a half and three quarters of an inch possible.
Thursday Night
Mostly cloudy, with a low around 38. Windy, with a northwest wind 11 to 21 mph, with gusts as high as 28 mph.
Friday
Mostly sunny, with a high near 55. Windy.
Friday Night
Widespread frost, mainly after 4am. Otherwise, clear, with a low around 32.
Saturday
Widespread frost, mainly before 8am. Otherwise, sunny, with a high near 60. Breezy.
Saturday Night
Clear, with a low around 40.
Sunday
Sunny, with a high near 65. Breezy.
Sunday Night
Mostly cloudy, with a low around 44.
Monday
Mostly sunny, with a high near 67.
Monday Night
Partly cloudy, with a low around 45.
Tuesday
Mostly sunny, with a high near 71.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Clear Lake IA
 43.13°N 93.37°W
Last Update:
6:01 pm CDT Oct 13, 2026
Forecast Valid:
8pm CDT Oct 13, 2026-6pm CDT Oct 20, 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