National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Critical Fire Weather for a Large Part of the Central U.S.; Areas of Severe Thunderstorms

Gusty to high winds and low relative humidity will bring elevated to critical fire weather across large parts of the Great Plains and more localized parts of the Great Basin and central Rockies Thursday into Friday. Severe thunderstorms with large hail and damaging wind gusts are possible over the central Plains Thursday into this weekend. Read More >

Current conditions at

Mason City Municipal Airport (KMCW)

Lat: 43.15°NLon: 93.33°WElev: 1188ft.

Fair

68°F

20°C

Humidity 23%
Wind Speed NE 12 mph
Barometer 30.03 in (1016.4 mb)
Dewpoint 29°F (-2°C)
Visibility 9.00 mi
Last update 13 May 7:53 pm CDT
Extended Forecast for

Clear Lake IA

  • Tonight

    Tonight: Mostly clear, with a low around 45. North northeast wind 5 to 9 mph becoming light and variable.

    Low: 45 °F

    Mostly Clear

  • Thursday

    Thursday: A 20 percent chance of showers and thunderstorms after 4pm. Increasing clouds, with a high near 77. Windy, with a south wind 13 to 18 mph increasing to 19 to 24 mph in the afternoon. Winds could gust as high as 33 mph.

    High: 77 °F

    Windy. Sunny
    then Slight
    Chance
    T-storms

  • Thursday Night

    Thursday Night: A 20 percent chance of showers after 1am. Mostly cloudy, then gradually becoming mostly clear, with a low around 52. Windy, with a south wind 11 to 21 mph, with gusts as high as 29 mph.

    Low: 52 °F

    Slight Chance
    Showers and
    Windy

  • Friday

    Friday: A 20 percent chance of showers after 1pm. Sunny, with a high near 86. South wind around 10 mph becoming west in the afternoon.

    High: 86 °F

    Sunny then
    Slight Chance
    Showers

  • Friday Night

    Friday Night: A chance of showers and thunderstorms before 10pm, then a chance of showers between 10pm and 1am. Mostly clear, with a low around 52. West southwest wind 5 to 10 mph becoming east southeast after midnight. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 52 °F

    Chance
    Showers

  • Saturday

    Saturday: A 30 percent chance of showers, mainly after 1pm. Mostly sunny, with a high near 82. New precipitation amounts of less than a tenth of an inch possible.

    High: 82 °F

    Chance
    Showers

  • Saturday Night

    Saturday Night: A 40 percent chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 52.

    Low: 52 °F

    Slight Chance
    T-storms then
    Chance
    Showers

  • Sunday

    Sunday: A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 78. Windy.

    High: 78 °F

    Windy. Chance
    Showers then
    Chance
    T-storms

  • Sunday Night

    Sunday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 59. Windy. Chance of precipitation is 60%.

    Low: 59 °F

    Showers
    Likely and
    Windy

Detailed Forecast

Tonight
Mostly clear, with a low around 45. North northeast wind 5 to 9 mph becoming light and variable.
Thursday
A 20 percent chance of showers and thunderstorms after 4pm. Increasing clouds, with a high near 77. Windy, with a south wind 13 to 18 mph increasing to 19 to 24 mph in the afternoon. Winds could gust as high as 33 mph.
Thursday Night
A 20 percent chance of showers after 1am. Mostly cloudy, then gradually becoming mostly clear, with a low around 52. Windy, with a south wind 11 to 21 mph, with gusts as high as 29 mph.
Friday
A 20 percent chance of showers after 1pm. Sunny, with a high near 86. South wind around 10 mph becoming west in the afternoon.
Friday Night
A chance of showers and thunderstorms before 10pm, then a chance of showers between 10pm and 1am. Mostly clear, with a low around 52. West southwest wind 5 to 10 mph becoming east southeast after midnight. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Saturday
A 30 percent chance of showers, mainly after 1pm. Mostly sunny, with a high near 82. New precipitation amounts of less than a tenth of an inch possible.
Saturday Night
A 40 percent chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 52.
Sunday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 78. Windy.
Sunday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 59. Windy. Chance of precipitation is 60%.
Monday
A chance of showers, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 79. Windy. Chance of precipitation is 70%.
Monday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 49. Windy.
Tuesday
Partly sunny, with a high near 65.
Tuesday Night
Mostly cloudy, with a low around 44.
Wednesday
Mostly sunny, with a high near 69.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Clear Lake IA
 43.13°N 93.37°W
Last Update:
7:32 pm CDT May 13, 2026
Forecast Valid:
8pm CDT May 13, 2026-6pm CDT May 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