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

56°F

13°C

Humidity 90%
Wind Speed Calm
Barometer 29.92 in (1012.4 mb)
Dewpoint 53°F (12°C)
Visibility 10.00 mi
Last update 21 Jun 1:53 am CDT
Extended Forecast for

Clear Lake IA

  • Overnight

    Overnight: Cloudy, with a steady temperature around 61. East wind around 5 mph.

    Low: 61 °F

    Cloudy

  • Sunday

    Sunday: Showers likely, mainly between noon and 3pm. Mostly cloudy, with a high near 68. East southeast wind 7 to 11 mph, with gusts as high as 18 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    High: 68 °F

    Showers
    Likely

  • Sunday Night

    Sunday Night: A 10 percent chance of showers before 7pm. Mostly cloudy, with a low around 51. East wind 5 to 9 mph becoming light and variable.

    Low: 51 °F

    Slight Chance
    Showers then
    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 76. Northeast wind around 6 mph.

    High: 76 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 53. East northeast wind around 5 mph becoming calm in the evening.

    Low: 53 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A slight chance of showers between 1pm and 4pm, then a slight chance of showers and thunderstorms after 4pm. Mostly sunny, with a high near 77. Chance of precipitation is 20%.

    High: 77 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: Showers and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am. Low around 57. Chance of precipitation is 80%.

    Low: 57 °F

    Showers

  • Wednesday

    Wednesday: Sunny, with a high near 75.

    High: 75 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 53.

    Low: 53 °F

    Mostly Clear

Detailed Forecast

Overnight
Cloudy, with a steady temperature around 61. East wind around 5 mph.
Sunday
Showers likely, mainly between noon and 3pm. Mostly cloudy, with a high near 68. East southeast wind 7 to 11 mph, with gusts as high as 18 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Sunday Night
A 10 percent chance of showers before 7pm. Mostly cloudy, with a low around 51. East wind 5 to 9 mph becoming light and variable.
Monday
Sunny, with a high near 76. Northeast wind around 6 mph.
Monday Night
Partly cloudy, with a low around 53. East northeast wind around 5 mph becoming calm in the evening.
Tuesday
A slight chance of showers between 1pm and 4pm, then a slight chance of showers and thunderstorms after 4pm. Mostly sunny, with a high near 77. Chance of precipitation is 20%.
Tuesday Night
Showers and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am. Low around 57. Chance of precipitation is 80%.
Wednesday
Sunny, with a high near 75.
Wednesday Night
Mostly clear, with a low around 53.
Thursday
Mostly sunny, with a high near 76.
Thursday Night
Partly cloudy, with a low around 53.
Friday
Mostly sunny, with a high near 78.
Friday Night
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 59.
Saturday
Partly sunny, with a high near 81. Breezy.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Clear Lake IA
 43.13°N 93.37°W
Last Update:
2:43 am CDT Jun 21, 2026
Forecast Valid:
2am CDT Jun 21, 2026-6pm CDT Jun 27, 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