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

30°F

-1°C

Humidity 92%
Wind Speed SE 5 mph
Barometer 29.63 in (1003.8 mb)
Dewpoint 28°F (-2°C)
Visibility 10.00 mi
Wind Chill25°F (-4°C)
Last update 8 Jan 4:53 am CST
Extended Forecast for

Thornton IA

  • Today

    Today: Rain, mainly after 2pm. High near 40. Light and variable wind becoming north 9 to 14 mph in the afternoon. Winds could gust as high as 18 mph. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.

    High: 40 °F

    Mostly Cloudy
    then Rain

  • Tonight

    Tonight: Rain and snow before 4am, then a slight chance of snow between 4am and 5am. Low around 28. Blustery, with a north northwest wind 15 to 17 mph, with gusts as high as 24 mph. Chance of precipitation is 100%. Little or no snow accumulation expected.

    Low: 28 °F

    Blustery.
    Rain/Snow
    then
    Rain/Snow
    Likely

  • Friday

    Friday: Mostly cloudy, then gradually becoming sunny, with a high near 35. North northwest wind 6 to 14 mph, with gusts as high as 20 mph.

    High: 35 °F

    Decreasing
    Clouds

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 23. Northwest wind 5 to 9 mph.

    Low: 23 °F

    Mostly Cloudy

  • Saturday

    Saturday: A 30 percent chance of snow. Partly sunny, with a high near 27. Blustery, with a northwest wind 10 to 20 mph, with gusts as high as 25 mph. New snow accumulation of less than a half inch possible.

    High: 27 °F

    Chance Snow
    and Blustery

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 12. Blustery.

    Low: 12 °F

    Mostly Cloudy
    and Blustery

  • Sunday

    Sunday: Mostly sunny, with a high near 25.

    High: 25 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 20.

    Low: 20 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 40.

    High: 40 °F

    Sunny

Detailed Forecast

Today
Rain, mainly after 2pm. High near 40. Light and variable wind becoming north 9 to 14 mph in the afternoon. Winds could gust as high as 18 mph. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.
Tonight
Rain and snow before 4am, then a slight chance of snow between 4am and 5am. Low around 28. Blustery, with a north northwest wind 15 to 17 mph, with gusts as high as 24 mph. Chance of precipitation is 100%. Little or no snow accumulation expected.
Friday
Mostly cloudy, then gradually becoming sunny, with a high near 35. North northwest wind 6 to 14 mph, with gusts as high as 20 mph.
Friday Night
Mostly cloudy, with a low around 23. Northwest wind 5 to 9 mph.
Saturday
A 30 percent chance of snow. Partly sunny, with a high near 27. Blustery, with a northwest wind 10 to 20 mph, with gusts as high as 25 mph. New snow accumulation of less than a half inch possible.
Saturday Night
Mostly cloudy, with a low around 12. Blustery.
Sunday
Mostly sunny, with a high near 25.
Sunday Night
Partly cloudy, with a low around 20.
Monday
Sunny, with a high near 40.
Monday Night
Mostly cloudy, with a low around 30.
Tuesday
Partly sunny, with a high near 39.
Tuesday Night
Mostly cloudy, with a low around 24.
Wednesday
Partly sunny, with a high near 29. Blustery.
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ABOUT THIS FORECAST

 
Point Forecast:
Thornton IA
 42.95°N 93.37°W
Last Update:
3:16 am CST Jan 8, 2026
Forecast Valid:
5am CST Jan 8, 2026-6pm CST Jan 14, 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