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

10°F

-12°C

Humidity 69%
Wind Speed N 6 mph
Barometer 30.58 in (1038.0 mb)
Dewpoint 2°F (-17°C)
Visibility 10.00 mi
Wind Chill0°F (-18°C)
Last update 23 Feb 9:53 am CST
Extended Forecast for

Thornton IA

  • Today

    Today: Sunny, with a high near 20. Wind chill values as low as 5. Light and variable wind becoming south 5 to 8 mph in the afternoon.

    High: 20 °F

    Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 11. Wind chill values as low as -5. South wind 8 to 15 mph, with gusts as high as 22 mph.

    Low: 11 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 41. Wind chill values as low as 5. Windy, with a south wind 14 to 21 mph becoming northwest in the afternoon. Winds could gust as high as 26 mph.

    High: 41 °F

    Partly Sunny
    and Windy

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 14. Wind chill values as low as zero. Blustery, with a northwest wind 11 to 17 mph, with gusts as high as 22 mph.

    Low: 14 °F

    Partly Cloudy
    and Blustery
    then Mostly
    Clear

  • Wednesday

    Wednesday: A 30 percent chance of snow after noon. Mostly sunny, with a high near 28. Northwest wind 6 to 10 mph becoming south southeast in the afternoon. Little or no snow accumulation expected.

    High: 28 °F

    Sunny then
    Chance Snow

  • Wednesday Night

    Wednesday Night: Snow likely, mainly before midnight. Mostly cloudy, with a low around 17. Chance of precipitation is 60%.

    Low: 17 °F

    Snow Likely

  • Thursday

    Thursday: Mostly sunny, with a high near 34.

    High: 34 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 24.

    Low: 24 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 48.

    High: 48 °F

    Sunny

Detailed Forecast

Today
Sunny, with a high near 20. Wind chill values as low as 5. Light and variable wind becoming south 5 to 8 mph in the afternoon.
Tonight
Partly cloudy, with a low around 11. Wind chill values as low as -5. South wind 8 to 15 mph, with gusts as high as 22 mph.
Tuesday
Partly sunny, with a high near 41. Wind chill values as low as 5. Windy, with a south wind 14 to 21 mph becoming northwest in the afternoon. Winds could gust as high as 26 mph.
Tuesday Night
Mostly clear, with a low around 14. Wind chill values as low as zero. Blustery, with a northwest wind 11 to 17 mph, with gusts as high as 22 mph.
Wednesday
A 30 percent chance of snow after noon. Mostly sunny, with a high near 28. Northwest wind 6 to 10 mph becoming south southeast in the afternoon. Little or no snow accumulation expected.
Wednesday Night
Snow likely, mainly before midnight. Mostly cloudy, with a low around 17. Chance of precipitation is 60%.
Thursday
Mostly sunny, with a high near 34.
Thursday Night
Mostly clear, with a low around 24.
Friday
Sunny, with a high near 48.
Friday Night
Partly cloudy, with a low around 20.
Saturday
Partly sunny, with a high near 33. Breezy.
Saturday Night
Partly cloudy, with a low around 12.
Sunday
A 30 percent chance of snow. Partly sunny, with a high near 27.
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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:
9:57 am CST Feb 23, 2026
Forecast Valid:
10am CST Feb 23, 2026-6pm CST Mar 1, 2026
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation