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

Autumn Temperatures for Eastern Third of the Country; Super Typhoon Approaching Guam

Cooler and less humid conditions for the eastern third of the nation as a cold slides off the east coast. Combination of dry and breezy conditions may result in spread of wildfires across the lower Mississippi Valley. In addition, fire weather conditions linger into portions of Southern California. For Guam, a super typhoon is approaching. Read More >

Current conditions at

Mason City Municipal Airport (KMCW)

Lat: 43.15°NLon: 93.33°WElev: 1188ft.

Fair

59°F

15°C

Humidity 32%
Wind Speed S 18 G 28 mph
Barometer 30.32 in (1026.8 mb)
Dewpoint 29°F (-2°C)
Visibility 10.00 mi
Last update 17 Oct 3:53 pm CDT
Extended Forecast for

Clear Lake IA

  • This Afternoon

    This Afternoon: Sunny, with a high near 59. Breezy, with a south southwest wind around 16 mph, with gusts as high as 25 mph.

    High: 59 °F

    Sunny and
    Breezy

  • Tonight

    Tonight: Clear, with a low around 41. South southwest wind 11 to 14 mph, with gusts as high as 22 mph.

    Low: 41 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 64. Breezy, with a south southwest wind 15 to 18 mph, with gusts as high as 28 mph.

    High: 64 °F

    Sunny and
    Breezy

  • Sunday Night

    Sunday Night: Clear, with a low around 40. South wind 5 to 8 mph.

    Low: 40 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 63. South wind 3 to 7 mph.

    High: 63 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 41.

    Low: 41 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 66.

    High: 66 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 47.

    Low: 47 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 71.

    High: 71 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Sunny, with a high near 59. Breezy, with a south southwest wind around 16 mph, with gusts as high as 25 mph.
Tonight
Clear, with a low around 41. South southwest wind 11 to 14 mph, with gusts as high as 22 mph.
Sunday
Sunny, with a high near 64. Breezy, with a south southwest wind 15 to 18 mph, with gusts as high as 28 mph.
Sunday Night
Clear, with a low around 40. South wind 5 to 8 mph.
Monday
Sunny, with a high near 63. South wind 3 to 7 mph.
Monday Night
Mostly clear, with a low around 41.
Tuesday
Sunny, with a high near 66.
Tuesday Night
Mostly clear, with a low around 47.
Wednesday
Mostly sunny, with a high near 71.
Wednesday Night
Partly cloudy, with a low around 50.
Thursday
Sunny, with a high near 73.
Thursday Night
Mostly clear, with a low around 52.
Friday
Mostly sunny, with a high near 72.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Clear Lake IA
 43.15°N 93.37°W
Last Update:
2:47 pm CDT Oct 17, 2026
Forecast Valid:
4pm CDT Oct 17, 2026-6pm CDT Oct 23, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

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Chance of Precipitation