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

Dangerous Heat and Heavy Rainfall into the Weekend

Hot temperatures and high humidity are forecast to continue across the mid-Mississippi Valley into this weekend. Heat Advisories remain in effect. Heavy to excessive rainfall occurring at times through the weekend could bring areas of flooding to parts of the northern Rockies, upper Midwest, central Great Lakes, and southern New England. Read More >

Hazardous Weather Conditions

Current conditions at

Mason City Municipal Airport (KMCW)

Lat: 43.15°NLon: 93.33°WElev: 1188ft.

Overcast

59°F

15°C

Humidity 96%
Wind Speed NE 15 G 23 mph
Barometer 30.06 in (1017.3 mb)
Dewpoint 58°F (14°C)
Visibility 10.00 mi
Last update 20 Sep 9:53 am CDT
Extended Forecast for

Mason City Municipal Airport IA

  • Today

    Today: A slight chance of drizzle before 1pm. Mostly cloudy, with a high near 66. Breezy, with an east northeast wind around 16 mph, with gusts as high as 24 mph.

    High: 66 °F

    Slight Chance
    Drizzle and
    Breezy

  • Tonight

    Tonight: A slight chance of drizzle between 9pm and 1am, then a chance of showers after 1am. Cloudy, with a low around 49. East northeast wind 11 to 13 mph. Chance of precipitation is 50%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 49 °F

    Slight Chance
    Drizzle then
    Chance
    Showers

  • Monday

    Monday: Showers likely, mainly before 10am. Cloudy, with a high near 58. East northeast wind 11 to 13 mph, with gusts as high as 18 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 58 °F

    Showers
    Likely then
    Chance
    Showers

  • Monday Night

    Monday Night: A 20 percent chance of showers before 1am. Mostly cloudy, with a low around 45. East northeast wind 7 to 10 mph.

    Low: 45 °F

    Slight Chance
    Showers

  • Tuesday

    Tuesday: Mostly sunny, with a high near 61. East wind 8 to 10 mph.

    High: 61 °F

    Mostly Sunny

  • Tuesday Night

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

    Low: 41 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 64.

    High: 64 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 45.

    Low: 45 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly cloudy, with a high near 65.

    High: 65 °F

    Mostly Cloudy

Detailed Forecast

Today
A slight chance of drizzle before 1pm. Mostly cloudy, with a high near 66. Breezy, with an east northeast wind around 16 mph, with gusts as high as 24 mph.
Tonight
A slight chance of drizzle between 9pm and 1am, then a chance of showers after 1am. Cloudy, with a low around 49. East northeast wind 11 to 13 mph. Chance of precipitation is 50%. New precipitation amounts between a tenth and quarter of an inch possible.
Monday
Showers likely, mainly before 10am. Cloudy, with a high near 58. East northeast wind 11 to 13 mph, with gusts as high as 18 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Monday Night
A 20 percent chance of showers before 1am. Mostly cloudy, with a low around 45. East northeast wind 7 to 10 mph.
Tuesday
Mostly sunny, with a high near 61. East wind 8 to 10 mph.
Tuesday Night
Mostly clear, with a low around 41.
Wednesday
Sunny, with a high near 64.
Wednesday Night
Partly cloudy, with a low around 45.
Thursday
Mostly cloudy, with a high near 65.
Thursday Night
Mostly cloudy, with a low around 50.
Friday
Mostly cloudy, with a high near 68.
Friday Night
Mostly cloudy, with a low around 50.
Saturday
Partly sunny, with a high near 68.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Mason City Municipal Airport IA
 43.15°N 93.34°W
Last Update:
5:21 am CDT Sep 20, 2026
Forecast Valid:
10am CDT Sep 20, 2026-6pm CDT Sep 26, 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