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.

Fair

80°F

27°C

Humidity 62%
Wind Speed S 13 mph
Barometer 29.84 in (1008.9 mb)
Dewpoint 66°F (19°C)
Visibility 10.00 mi
Heat Index82°F (28°C)
Last update 22 Jun 10:53 pm CDT
Extended Forecast for

Clear Lake IA

  • Tonight

    Tonight: Increasing clouds, with a low around 76. Breezy, with a south southwest wind 17 to 20 mph, with gusts as high as 33 mph.

    Low: 76 °F

    Increasing
    Clouds and
    Breezy

  • Monday

    Monday: A chance of showers and thunderstorms between 11am and 1pm, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 83. Southwest wind 10 to 15 mph becoming northwest in the afternoon. 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.

    High: 83 °F

    Chance
    T-storms then
    Showers
    Likely

  • Monday Night

    Monday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 10pm. Mostly cloudy, with a low around 63. North northeast wind 6 to 8 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 63 °F

    Showers
    Likely

  • Tuesday

    Tuesday: Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 75. Northeast wind around 8 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.

    High: 75 °F

    Showers
    Likely

  • Tuesday Night

    Tuesday Night: Showers and possibly a thunderstorm. Low around 64. East wind around 7 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 64 °F

    Showers
    Likely then
    Showers

  • Wednesday

    Wednesday: Showers and possibly a thunderstorm. High near 85. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.

    High: 85 °F

    Showers then
    T-storms

  • Wednesday Night

    Wednesday Night: Showers and possibly a thunderstorm. Low around 67. Chance of precipitation is 80%.

    Low: 67 °F

    Showers

  • Thursday

    Thursday: Showers likely and possibly a thunderstorm. Partly sunny, with a high near 83. Chance of precipitation is 70%.

    High: 83 °F

    Showers
    Likely

  • Thursday Night

    Thursday Night: Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 63. Chance of precipitation is 60%.

    Low: 63 °F

    Showers
    Likely

Detailed Forecast

Tonight
Increasing clouds, with a low around 76. Breezy, with a south southwest wind 17 to 20 mph, with gusts as high as 33 mph.
Monday
A chance of showers and thunderstorms between 11am and 1pm, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 83. Southwest wind 10 to 15 mph becoming northwest in the afternoon. 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.
Monday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 10pm. Mostly cloudy, with a low around 63. North northeast wind 6 to 8 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Tuesday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 75. Northeast wind around 8 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Tuesday Night
Showers and possibly a thunderstorm. Low around 64. East wind around 7 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Wednesday
Showers and possibly a thunderstorm. High near 85. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.
Wednesday Night
Showers and possibly a thunderstorm. Low around 67. Chance of precipitation is 80%.
Thursday
Showers likely and possibly a thunderstorm. Partly sunny, with a high near 83. Chance of precipitation is 70%.
Thursday Night
Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 63. Chance of precipitation is 60%.
Friday
A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 84.
Friday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 66.
Saturday
A 30 percent chance of showers and thunderstorms. Sunny, with a high near 86.
Saturday Night
A 50 percent chance of showers and thunderstorms. Partly cloudy, with a low around 68.
Sunday
A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 86.
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ABOUT THIS FORECAST

 
Point Forecast:
Clear Lake IA
 43.13°N 93.37°W
Last Update:
10:36 pm CDT Jun 22, 2025
Forecast Valid:
11pm CDT Jun 22, 2025-6pm CDT Jun 29, 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