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

22°C

71°F

Humidity 73%
Wind Speed W 7 km/h
Barometer 1013.6 mb (29.96 in)
Dewpoint 17°C (62°F)
Visibility 16 km
Last update 12 Jul 7:53 pm CDT
Extended Forecast for

Clear Lake IA

  • Tonight

    Tonight: Mostly clear, with a low around 14. West northwest wind 5 to 10 km/h becoming calm.

    Low: 14 °C

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 28. South southwest wind 10 to 15 km/h increasing to 16 to 21 km/h in the afternoon. Winds could gust as high as 32 km/h.

    High: 28 °C

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 18. South southwest wind 10 to 16 km/h.

    Low: 18 °C

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 31. South southwest wind around 10 km/h.

    High: 31 °C

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 19. South wind around 11 km/h.

    Low: 19 °C

    Mostly Clear

  • Tuesday

    Tuesday: A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 30.

    High: 30 °C

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A 50 percent chance of showers and thunderstorms. Partly cloudy, with a low around 19.

    Low: 19 °C

    Chance
    T-storms

  • Wednesday

    Wednesday: A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 27.

    High: 27 °C

    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 16.

    Low: 16 °C

    Chance
    T-storms

Detailed Forecast

Tonight
Mostly clear, with a low around 14. West northwest wind 5 to 10 km/h becoming calm.
Sunday
Sunny, with a high near 28. South southwest wind 10 to 15 km/h increasing to 16 to 21 km/h in the afternoon. Winds could gust as high as 32 km/h.
Sunday Night
Mostly clear, with a low around 18. South southwest wind 10 to 16 km/h.
Monday
Sunny, with a high near 31. South southwest wind around 10 km/h.
Monday Night
Mostly clear, with a low around 19. South wind around 11 km/h.
Tuesday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 30.
Tuesday Night
A 50 percent chance of showers and thunderstorms. Partly cloudy, with a low around 19.
Wednesday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 27.
Wednesday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 16.
Thursday
Partly sunny, with a high near 24.
Thursday Night
Mostly cloudy, with a low around 14.
Friday
Mostly sunny, with a high near 24.
Friday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 16.
Saturday
Partly sunny, with a high near 26.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Clear Lake IA
 43.13°N 93.37°W
Last Update:
6:38 pm CDT Jul 12, 2025
Forecast Valid:
8pm CDT Jul 12, 2025-6pm CDT Jul 19, 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