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

Dangerous Heat over the South-Central and Southwest U.S. Through Next Week

Dangerous heat persists across the Desert Southwest through this weekend and across the Southern Plains and Lower Mississippi Valley through at least the middle of next week. Numerous daily record high temperatures are expected through at least Tuesday for much of Texas and Oklahoma as well as portions of Louisiana, New Mexico, and Arizona. Read More >

Current conditions at

Mason City Municipal Airport (KMCW)

Lat: 43.15°NLon: 93.33°WElev: 1188ft.

Fair

57°F

14°C

Humidity 93%
Wind Speed NW 6 mph
Barometer 30.12 in (1019.2 mb)
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Last update 22 Aug 11:53 pm CDT
Extended Forecast for

Clear Lake IA

  • Overnight

    Overnight: Mostly clear, with a low around 53. North northwest wind 3 to 5 mph.

    Low: 53 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 78. Light north northwest wind.

    High: 78 °F

    Sunny

  • Sunday Night

    Sunday Night: Increasing clouds, with a low around 56. Calm wind.

    Low: 56 °F

    Increasing
    Clouds

  • Monday

    Monday: Partly sunny, with a high near 76. Calm wind becoming south around 5 mph in the morning.

    High: 76 °F

    Partly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 61. Southeast wind around 6 mph.

    Low: 61 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: A 20 percent chance of showers before 1pm. Mostly sunny, with a high near 83.

    High: 83 °F

    Slight Chance
    Showers

  • Tuesday Night

    Tuesday Night: A 20 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 63.

    Low: 63 °F

    Partly Cloudy
    then Slight
    Chance
    T-storms

  • Wednesday

    Wednesday: Sunny, with a high near 82.

    High: 82 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Clear, with a low around 60.

    Low: 60 °F

    Clear

Detailed Forecast

Overnight
Mostly clear, with a low around 53. North northwest wind 3 to 5 mph.
Sunday
Sunny, with a high near 78. Light north northwest wind.
Sunday Night
Increasing clouds, with a low around 56. Calm wind.
Monday
Partly sunny, with a high near 76. Calm wind becoming south around 5 mph in the morning.
Monday Night
Mostly cloudy, with a low around 61. Southeast wind around 6 mph.
Tuesday
A 20 percent chance of showers before 1pm. Mostly sunny, with a high near 83.
Tuesday Night
A 20 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 63.
Wednesday
Sunny, with a high near 82.
Wednesday Night
Clear, with a low around 60.
Thursday
Sunny, with a high near 81.
Thursday Night
Mostly clear, with a low around 59.
Friday
Mostly sunny, with a high near 81.
Friday Night
A 30 percent chance of showers. Partly cloudy, with a low around 62.
Saturday
A 40 percent chance of showers. Partly sunny, with a high near 81.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Clear Lake IA
 43.13°N 93.37°W
Last Update:
10:11 pm CDT Aug 22, 2026
Forecast Valid:
12am CDT Aug 23, 2026-6pm CDT Aug 29, 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