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.

Overcast

62°F

17°C

Humidity 67%
Wind Speed SE 20 G 26 mph
Barometer 29.91 in (1012.5 mb)
Dewpoint 51°F (11°C)
Visibility 10.00 mi
Last update 22 May 5:53 pm CDT
Extended Forecast for

Clear Lake IA

  • Tonight

    Tonight: Showers and thunderstorms likely. Mostly cloudy, with a low around 50. Windy, with a southeast wind 16 to 21 mph decreasing to 8 to 13 mph after midnight. Winds could gust as high as 28 mph. Chance of precipitation is 70%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 50 °F

    Mostly Cloudy
    and Windy
    then Showers
    Likely

  • Saturday

    Saturday: A 30 percent chance of showers before 7am. Mostly cloudy, then gradually becoming sunny, with a high near 73. South wind 6 to 9 mph becoming west northwest in the afternoon. New precipitation amounts of less than a tenth of an inch possible.

    High: 73 °F

    Chance
    Showers then
    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, then gradually becoming mostly clear, with a low around 48. West northwest wind 5 to 8 mph becoming calm in the evening.

    Low: 48 °F

    Decreasing
    Clouds

  • Sunday

    Sunday: Sunny, with a high near 80. Light south southwest wind increasing to 6 to 11 mph in the morning.

    High: 80 °F

    Sunny

  • Sunday Night

    Sunday Night: A slight chance of showers and thunderstorms between 1am and 4am, then a slight chance of showers after 4am. Partly cloudy, with a low around 54. South southwest wind 6 to 8 mph. Chance of precipitation is 20%.

    Low: 54 °F

    Mostly Clear
    then Slight
    Chance
    T-storms

  • Memorial Day

    Memorial Day: Sunny, with a high near 84.

    High: 84 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 58.

    Low: 58 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 83.

    High: 83 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 58.

    Low: 58 °F

    Partly Cloudy

Detailed Forecast

Tonight
Showers and thunderstorms likely. Mostly cloudy, with a low around 50. Windy, with a southeast wind 16 to 21 mph decreasing to 8 to 13 mph after midnight. Winds could gust as high as 28 mph. Chance of precipitation is 70%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Saturday
A 30 percent chance of showers before 7am. Mostly cloudy, then gradually becoming sunny, with a high near 73. South wind 6 to 9 mph becoming west northwest in the afternoon. New precipitation amounts of less than a tenth of an inch possible.
Saturday Night
Mostly cloudy, then gradually becoming mostly clear, with a low around 48. West northwest wind 5 to 8 mph becoming calm in the evening.
Sunday
Sunny, with a high near 80. Light south southwest wind increasing to 6 to 11 mph in the morning.
Sunday Night
A slight chance of showers and thunderstorms between 1am and 4am, then a slight chance of showers after 4am. Partly cloudy, with a low around 54. South southwest wind 6 to 8 mph. Chance of precipitation is 20%.
Memorial Day
Sunny, with a high near 84.
Monday Night
Partly cloudy, with a low around 58.
Tuesday
Sunny, with a high near 83.
Tuesday Night
Partly cloudy, with a low around 58.
Wednesday
Mostly sunny, with a high near 82.
Wednesday Night
Partly cloudy, with a low around 58.
Thursday
Mostly sunny, with a high near 79.
Thursday Night
Partly cloudy, with a low around 57.
Friday
Mostly sunny, with a high near 79.
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:
5:46 pm CDT May 22, 2026
Forecast Valid:
6pm CDT May 22, 2026-6pm CDT May 29, 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