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

78°F

26°C

Humidity 24%
Wind Speed W 15 G 25 mph
Barometer 29.61 in (1002.0 mb)
Dewpoint 38°F (3°C)
Visibility 10.00 mi
Heat Index78°F (26°C)
Last update 30 Mar 6:53 pm CDT
Extended Forecast for

Thornton IA

  • Tonight

    Tonight: A slight chance of showers and thunderstorms between 4am and 5am, then a chance of rain and thunderstorms after 5am. Mostly cloudy, then gradually becoming mostly clear, with a low around 47. West southwest wind 7 to 13 mph becoming southeast after midnight. Winds could gust as high as 18 mph. Chance of precipitation is 30%.

    Low: 47 °F

    Mostly Cloudy
    then Chance
    Showers

  • Tuesday

    Tuesday: A slight chance of rain and thunderstorms before 10am, then a slight chance of rain between 10am and 1pm. Partly sunny, with a high near 58. Windy, with a north wind 16 to 25 mph, with gusts as high as 32 mph. Chance of precipitation is 20%.

    High: 58 °F

    Windy. Slight
    Chance
    T-storms then
    Slight Chance
    Rain

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 32. Breezy, with a northeast wind 14 to 20 mph, with gusts as high as 25 mph.

    Low: 32 °F

    Mostly Cloudy
    and Breezy
    then Mostly
    Cloudy

  • Wednesday

    Wednesday: A chance of rain after 1pm, mixing with snow after 4pm. Mostly cloudy, with a high near 41. Breezy, with an east wind 14 to 18 mph, with gusts as high as 24 mph. Chance of precipitation is 50%. Little or no snow accumulation expected.

    High: 41 °F

    Breezy.
    Mostly Cloudy
    then Chance
    Rain/Snow

  • Wednesday Night

    Wednesday Night: Rain, possibly mixed with snow before 1am, then rain or freezing rain. Low around 30. Breezy, with an east wind 18 to 20 mph, with gusts as high as 24 mph. Chance of precipitation is 100%. New ice accumulation of less than a 0.1 of an inch possible. New snow accumulation of less than a half inch possible.

    Low: 30 °F

    Wintry Mix
    and Breezy

  • Thursday

    Thursday: Rain, possibly mixed with freezing rain, becoming all rain after 1pm. High near 44. Breezy. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

    High: 44 °F

    Rain/Freezing
    Rain and
    Breezy

  • Thursday Night

    Thursday Night: A 30 percent chance of rain before 1am. Mostly cloudy, with a low around 29.

    Low: 29 °F

    Chance Rain

  • Friday

    Friday: A 50 percent chance of rain and thunderstorms after 1pm. Mostly cloudy, with a high near 49. Breezy.

    High: 49 °F

    Partly Sunny
    then Chance
    T-storms and
    Breezy

  • Friday Night

    Friday Night: Rain and possibly a thunderstorm before 1am, then rain likely. Low around 34. Breezy. Chance of precipitation is 80%.

    Low: 34 °F

    Rain and
    Breezy

Detailed Forecast

Tonight
A slight chance of showers and thunderstorms between 4am and 5am, then a chance of rain and thunderstorms after 5am. Mostly cloudy, then gradually becoming mostly clear, with a low around 47. West southwest wind 7 to 13 mph becoming southeast after midnight. Winds could gust as high as 18 mph. Chance of precipitation is 30%.
Tuesday
A slight chance of rain and thunderstorms before 10am, then a slight chance of rain between 10am and 1pm. Partly sunny, with a high near 58. Windy, with a north wind 16 to 25 mph, with gusts as high as 32 mph. Chance of precipitation is 20%.
Tuesday Night
Mostly cloudy, with a low around 32. Breezy, with a northeast wind 14 to 20 mph, with gusts as high as 25 mph.
Wednesday
A chance of rain after 1pm, mixing with snow after 4pm. Mostly cloudy, with a high near 41. Breezy, with an east wind 14 to 18 mph, with gusts as high as 24 mph. Chance of precipitation is 50%. Little or no snow accumulation expected.
Wednesday Night
Rain, possibly mixed with snow before 1am, then rain or freezing rain. Low around 30. Breezy, with an east wind 18 to 20 mph, with gusts as high as 24 mph. Chance of precipitation is 100%. New ice accumulation of less than a 0.1 of an inch possible. New snow accumulation of less than a half inch possible.
Thursday
Rain, possibly mixed with freezing rain, becoming all rain after 1pm. High near 44. Breezy. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Thursday Night
A 30 percent chance of rain before 1am. Mostly cloudy, with a low around 29.
Friday
A 50 percent chance of rain and thunderstorms after 1pm. Mostly cloudy, with a high near 49. Breezy.
Friday Night
Rain and possibly a thunderstorm before 1am, then rain likely. Low around 34. Breezy. Chance of precipitation is 80%.
Saturday
A chance of rain and snow before 1pm, then a chance of rain. Mostly cloudy, with a high near 42. Windy. Chance of precipitation is 50%.
Saturday Night
A chance of rain and snow. Mostly cloudy, with a low around 28. Windy. Chance of precipitation is 30%.
Sunday
Mostly sunny, with a high near 47. Breezy.
Sunday Night
Mostly clear, with a low around 28.
Monday
Mostly sunny, with a high near 56. Breezy.
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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:
6:01 pm CDT Mar 30, 2026
Forecast Valid:
7pm CDT Mar 30, 2026-6pm CDT Apr 6, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation