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 85%
Wind Speed W 6 mph
Barometer 30.08 in (1019.7 mb)
Dewpoint 26°F (-3°C)
Visibility 10.00 mi
Wind Chill24°F (-4°C)
Last update 12 Jan 5:53 am CST
Extended Forecast for

Thornton IA

  • Today

    Today: Sunny, with a high near 44. West wind 7 to 10 mph.

    High: 44 °F

    Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 33. West southwest wind 8 to 15 mph, with gusts as high as 20 mph.

    Low: 33 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 44. Breezy, with a west wind 15 to 18 mph, with gusts as high as 24 mph.

    High: 44 °F

    Partly Sunny
    and Breezy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 19. Wind chill values as low as 5. Windy, with a northwest wind 14 to 19 mph increasing to 23 to 28 mph after midnight.

    Low: 19 °F

    Mostly Cloudy
    and Windy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 24. Windy, with a north northwest wind 20 to 29 mph, with gusts as high as 33 mph.

    High: 24 °F

    Mostly Sunny
    and Windy

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 10. Blustery.

    Low: 10 °F

    Mostly Clear
    and Blustery
    then Mostly
    Clear

  • Thursday

    Thursday: A 40 percent chance of snow after noon. Partly sunny, with a high near 29.

    High: 29 °F

    Partly Sunny
    then Chance
    Snow

  • Thursday Night

    Thursday Night: Snow likely, mainly before midnight. Mostly cloudy, with a low around 23. Blustery. Chance of precipitation is 60%.

    Low: 23 °F

    Snow Likely
    and Blustery

  • Friday

    Friday: Snow likely. Mostly cloudy, with a high near 30. Windy. Chance of precipitation is 60%.

    High: 30 °F

    Snow Likely
    and Windy

Detailed Forecast

Today
Sunny, with a high near 44. West wind 7 to 10 mph.
Tonight
Partly cloudy, with a low around 33. West southwest wind 8 to 15 mph, with gusts as high as 20 mph.
Tuesday
Partly sunny, with a high near 44. Breezy, with a west wind 15 to 18 mph, with gusts as high as 24 mph.
Tuesday Night
Mostly cloudy, with a low around 19. Wind chill values as low as 5. Windy, with a northwest wind 14 to 19 mph increasing to 23 to 28 mph after midnight.
Wednesday
Mostly sunny, with a high near 24. Windy, with a north northwest wind 20 to 29 mph, with gusts as high as 33 mph.
Wednesday Night
Mostly clear, with a low around 10. Blustery.
Thursday
A 40 percent chance of snow after noon. Partly sunny, with a high near 29.
Thursday Night
Snow likely, mainly before midnight. Mostly cloudy, with a low around 23. Blustery. Chance of precipitation is 60%.
Friday
Snow likely. Mostly cloudy, with a high near 30. Windy. Chance of precipitation is 60%.
Friday Night
Mostly cloudy, with a low around 5. Windy.
Saturday
Partly sunny, with a high near 11. Windy.
Saturday Night
Mostly cloudy, with a low around 0. Blustery.
Sunday
Mostly sunny, with a high near 18. Blustery.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Thornton IA
 42.95°N 93.37°W
Last Update:
3:11 am CST Jan 12, 2026
Forecast Valid:
6am CST Jan 12, 2026-6pm CST Jan 18, 2026
 
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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