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

Mason City Municipal Airport (KMCW)

Lat: 43.15°NLon: 93.33°WElev: 1188ft.

Fair

35°F

2°C

Humidity 61%
Wind Speed S 9 mph
Barometer 30.01 in (1016.5 mb)
Dewpoint 23°F (-5°C)
Visibility 10.00 mi
Wind Chill28°F (-2°C)
Last update 29 Mar 7:53 am CDT
Extended Forecast for

Thornton IA

  • Today

    Today: Mostly sunny, with a high near 68. South wind 10 to 15 mph, with gusts as high as 24 mph.

    High: 68 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 43. South southwest wind 6 to 9 mph.

    Low: 43 °F

    Mostly Clear

  • Monday

    Monday: Increasing clouds, with a high near 79. Breezy, with a south wind 6 to 16 mph, with gusts as high as 22 mph.

    High: 79 °F

    Sunny then
    Mostly Sunny
    and Breezy

  • Monday Night

    Monday Night: A chance of showers, with thunderstorms also possible after 10pm. Mostly cloudy, with a low around 45. South wind 10 to 15 mph, with gusts as high as 18 mph. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 45 °F

    Chance
    T-storms

  • Tuesday

    Tuesday: A 30 percent chance of showers, mainly after 1pm. Mostly cloudy, with a high near 57. Windy, with a north northwest wind 18 to 23 mph, with gusts as high as 29 mph. New precipitation amounts of less than a tenth of an inch possible.

    High: 57 °F

    Chance
    Showers and
    Windy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 29. Windy.

    Low: 29 °F

    Mostly Cloudy
    and Windy

  • Wednesday

    Wednesday: A 20 percent chance of showers after 1pm. Partly sunny, with a high near 47.

    High: 47 °F

    Mostly Sunny
    then Slight
    Chance
    Showers

  • Wednesday Night

    Wednesday Night: A chance of rain and snow showers before 1am, then a chance of snow showers. Mostly cloudy, with a low around 29. Chance of precipitation is 40%.

    Low: 29 °F

    Chance
    Rain/Snow

  • Thursday

    Thursday: A chance of snow showers before 1pm, then a chance of rain and snow showers. Mostly cloudy, with a high near 41. Breezy. Chance of precipitation is 50%.

    High: 41 °F

    Breezy.
    Chance Snow
    Showers then
    Chance
    Rain/Snow

Detailed Forecast

Today
Mostly sunny, with a high near 68. South wind 10 to 15 mph, with gusts as high as 24 mph.
Tonight
Mostly clear, with a low around 43. South southwest wind 6 to 9 mph.
Monday
Increasing clouds, with a high near 79. Breezy, with a south wind 6 to 16 mph, with gusts as high as 22 mph.
Monday Night
A chance of showers, with thunderstorms also possible after 10pm. Mostly cloudy, with a low around 45. South wind 10 to 15 mph, with gusts as high as 18 mph. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tuesday
A 30 percent chance of showers, mainly after 1pm. Mostly cloudy, with a high near 57. Windy, with a north northwest wind 18 to 23 mph, with gusts as high as 29 mph. New precipitation amounts of less than a tenth of an inch possible.
Tuesday Night
Mostly cloudy, with a low around 29. Windy.
Wednesday
A 20 percent chance of showers after 1pm. Partly sunny, with a high near 47.
Wednesday Night
A chance of rain and snow showers before 1am, then a chance of snow showers. Mostly cloudy, with a low around 29. Chance of precipitation is 40%.
Thursday
A chance of snow showers before 1pm, then a chance of rain and snow showers. Mostly cloudy, with a high near 41. Breezy. Chance of precipitation is 50%.
Thursday Night
A 30 percent chance of showers before 1am. Mostly cloudy, with a low around 31. Breezy.
Friday
A 40 percent chance of showers. Mostly cloudy, with a high near 51. Breezy.
Friday Night
Showers likely. Mostly cloudy, with a low around 37. Breezy. Chance of precipitation is 70%.
Saturday
A 50 percent chance of showers. Mostly cloudy, with a high near 49. Windy.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Thornton IA
 42.95°N 93.37°W
Last Update:
6:27 am CDT Mar 29, 2026
Forecast Valid:
8am CDT Mar 29, 2026-6pm CDT Apr 4, 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