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

14°F

-10°C

Humidity 71%
Wind Speed NW 13 mph
Barometer 30.18 in (1023.9 mb)
Dewpoint 6°F (-14°C)
Visibility 10.00 mi
Wind Chill0°F (-18°C)
Last update 14 Jan 9:53 pm CST
Extended Forecast for

Thornton IA

  • Tonight

    Tonight: Increasing clouds, with a low around 11. Wind chill values as low as zero. North northwest wind 5 to 9 mph becoming light and variable after midnight.

    Low: 11 °F

    Increasing
    Clouds

  • Thursday

    Thursday: A 30 percent chance of snow, mainly between noon and 5pm. Mostly cloudy, with a high near 30. Wind chill values as low as 5. Light west southwest wind becoming south southwest 10 to 15 mph in the morning. Winds could gust as high as 22 mph. Little or no snow accumulation expected.

    High: 30 °F

    Partly Sunny
    then Chance
    Snow

  • Thursday Night

    Thursday Night: A 30 percent chance of snow, mainly after midnight. Mostly cloudy, with a temperature rising to around 30 by 10pm. Blustery, with a west northwest wind 11 to 20 mph, with gusts as high as 23 mph. Little or no snow accumulation expected.

    Low: 27 °F⇑

    Chance Snow
    and Blustery

  • Friday

    Friday: A chance of snow before noon, then snow showers likely after noon. Patchy blowing snow after 3pm. Mostly cloudy, with a temperature falling to around 19 by 5pm. Wind chill values as low as zero. Windy, with a northwest wind 20 to 26 mph, with gusts as high as 33 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

    High: 31 °F⇓

    Snow Showers
    Likely and
    Patchy
    Blowing Snow

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 2. Windy, with a northwest wind 21 to 24 mph, with gusts as high as 29 mph.

    Low: 2 °F

    Mostly Cloudy
    and Windy

  • Saturday

    Saturday: Mostly cloudy and cold, with a high near 6. Windy.

    High: 6 °F

    Cold and
    Windy

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around -3. Blustery.

    Low: -3 °F

    Partly Cloudy
    and Blustery
    then Mostly
    Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 16. Breezy.

    High: 16 °F

    Partly Sunny
    then Partly
    Sunny and
    Breezy

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around -1. Blustery.

    Low: -1 °F

    Mostly Cloudy
    and Blustery

Detailed Forecast

Tonight
Increasing clouds, with a low around 11. Wind chill values as low as zero. North northwest wind 5 to 9 mph becoming light and variable after midnight.
Thursday
A 30 percent chance of snow, mainly between noon and 5pm. Mostly cloudy, with a high near 30. Wind chill values as low as 5. Light west southwest wind becoming south southwest 10 to 15 mph in the morning. Winds could gust as high as 22 mph. Little or no snow accumulation expected.
Thursday Night
A 30 percent chance of snow, mainly after midnight. Mostly cloudy, with a temperature rising to around 30 by 10pm. Blustery, with a west northwest wind 11 to 20 mph, with gusts as high as 23 mph. Little or no snow accumulation expected.
Friday
A chance of snow before noon, then snow showers likely after noon. Patchy blowing snow after 3pm. Mostly cloudy, with a temperature falling to around 19 by 5pm. Wind chill values as low as zero. Windy, with a northwest wind 20 to 26 mph, with gusts as high as 33 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Friday Night
Mostly cloudy, with a low around 2. Windy, with a northwest wind 21 to 24 mph, with gusts as high as 29 mph.
Saturday
Mostly cloudy and cold, with a high near 6. Windy.
Saturday Night
Mostly cloudy, with a low around -3. Blustery.
Sunday
Partly sunny, with a high near 16. Breezy.
Sunday Night
Mostly cloudy, with a low around -1. Blustery.
M.L.King Day
Mostly sunny and cold, with a high near 8. Blustery.
Monday Night
Partly cloudy, with a low around 0.
Tuesday
Mostly sunny, with a high near 18.
Tuesday Night
Mostly cloudy, with a low around 7.
Wednesday
Partly sunny, with a high near 23.
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ABOUT THIS FORECAST

 
Point Forecast:
Thornton IA
 42.95°N 93.37°W
Last Update:
6:36 pm CST Jan 14, 2026
Forecast Valid:
10pm CST Jan 14, 2026-6pm CST Jan 21, 2026
 
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Additional Resources

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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