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

2°F

-17°C

Humidity 76%
Wind Speed NW 3 mph
Barometer 30.14 in (1022.8 mb)
Dewpoint -4°F (-20°C)
Visibility 10.00 mi
Last update 17 Mar 7:53 am CDT
Extended Forecast for

Thornton IA

  • Today

    Today: Snow, mainly after 4pm. High near 21. Wind chill values as low as zero. Light and variable wind becoming south 10 to 15 mph in the morning. Winds could gust as high as 21 mph. Chance of precipitation is 80%. Total daytime snow accumulation of less than one inch possible.

    High: 21 °F

    Partly Sunny
    then Snow

  • Tonight

    Tonight: Snow, mainly before 10pm. Temperature rising to around 24 by 2am. Wind chill values as low as 5. Breezy, with a south wind 9 to 16 mph, with gusts as high as 24 mph. Chance of precipitation is 80%. New snow accumulation of less than one inch possible.

    Low: 19 °F⇑

    Snow and
    Breezy then
    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 46. West southwest wind around 7 mph.

    High: 46 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 33. Southwest wind around 7 mph.

    Low: 33 °F

    Mostly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 51. North northwest wind 6 to 8 mph.

    High: 51 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 39.

    Low: 39 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 62.

    High: 62 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 40.

    Low: 40 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 70. Breezy.

    High: 70 °F

    Mostly Sunny
    then Sunny
    and Breezy

Detailed Forecast

Today
Snow, mainly after 4pm. High near 21. Wind chill values as low as zero. Light and variable wind becoming south 10 to 15 mph in the morning. Winds could gust as high as 21 mph. Chance of precipitation is 80%. Total daytime snow accumulation of less than one inch possible.
Tonight
Snow, mainly before 10pm. Temperature rising to around 24 by 2am. Wind chill values as low as 5. Breezy, with a south wind 9 to 16 mph, with gusts as high as 24 mph. Chance of precipitation is 80%. New snow accumulation of less than one inch possible.
Wednesday
Mostly sunny, with a high near 46. West southwest wind around 7 mph.
Wednesday Night
Mostly cloudy, with a low around 33. Southwest wind around 7 mph.
Thursday
Sunny, with a high near 51. North northwest wind 6 to 8 mph.
Thursday Night
Partly cloudy, with a low around 39.
Friday
Mostly sunny, with a high near 62.
Friday Night
Mostly cloudy, with a low around 40.
Saturday
Mostly sunny, with a high near 70. Breezy.
Saturday Night
Partly cloudy, with a low around 37.
Sunday
Partly sunny, with a high near 51. Breezy.
Sunday Night
Mostly cloudy, with a low around 27.
Monday
Partly sunny, with a high near 44.
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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:
8:46 am CDT Mar 17, 2026
Forecast Valid:
8am CDT Mar 17, 2026-6pm CDT Mar 23, 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