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.

Light Snow and Windy

6°F

-14°C

Humidity 76%
Wind Speed NW 26 G 36 mph
Barometer 30.11 in (1022.0 mb)
Dewpoint 0°F (-18°C)
Visibility 1.75 mi
Wind Chill-16°F (-27°C)
Last update 17 Jan 2:53 pm CST
Extended Forecast for

Thornton IA

Winter Weather Advisory January 18, 03:00am until January 18, 09:00pm
Cold Weather Advisory January 18, 09:00pm until January 19, 12:00pm
Click here for hazard details and duration
Winter Weather Advisory
Cold Weather Advisory

  • This Afternoon

    This Afternoon: A chance of flurries before 4pm. Patchy blowing snow. Mostly cloudy and cold, with a steady temperature around 6. Wind chill values as low as -15. Windy, with a northwest wind 17 to 21 mph, with gusts as high as 31 mph.

    High: 6 °F

    Chance
    Flurries and
    Patchy
    Blowing Snow

  • Tonight

    Tonight: A chance of flurries after 4am. Mostly cloudy, with a low around 1. Wind chill values as low as -15. Blustery, with a northwest wind 6 to 16 mph becoming south southwest after midnight. Winds could gust as high as 29 mph.

    Low: 1 °F

    Mostly Cloudy
    and Blustery
    then Mostly
    Cloudy

  • Sunday

    Sunday: A 50 percent chance of snow. Patchy blowing snow after 1pm. Mostly cloudy, with a high near 19. Wind chill values as low as -10. Windy, with a south southwest wind 13 to 18 mph becoming northwest 25 to 30 mph in the afternoon. Winds could gust as high as 43 mph. New snow accumulation of less than a half inch possible.

    High: 19 °F

    Chance Snow
    and Patchy
    Blowing Snow

  • Sunday Night

    Sunday Night: Patchy blowing snow. Mostly cloudy, with a low around -6. Wind chill values as low as -30. Windy, with a northwest wind 21 to 30 mph, with gusts as high as 43 mph.

    Low: -6 °F

    Patchy
    Blowing Snow
    and Windy

  • M.L.King Day

    M.L.King Day: Mostly sunny and cold, with a high near 7. Blustery, with a west northwest wind 15 to 20 mph decreasing to 9 to 14 mph in the afternoon. Winds could gust as high as 23 mph.

    High: 7 °F

    Cold and
    Blustery

  • Monday Night

    Monday Night: Partly cloudy, with a low around -2.

    Low: -2 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 21.

    High: 21 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A 30 percent chance of snow before midnight. Mostly cloudy, with a low around 13.

    Low: 13 °F

    Chance Snow
    then Mostly
    Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 21. Blustery.

    High: 21 °F

    Partly Sunny
    and Blustery

Detailed Forecast

This Afternoon
A chance of flurries before 4pm. Patchy blowing snow. Mostly cloudy and cold, with a steady temperature around 6. Wind chill values as low as -15. Windy, with a northwest wind 17 to 21 mph, with gusts as high as 31 mph.
Tonight
A chance of flurries after 4am. Mostly cloudy, with a low around 1. Wind chill values as low as -15. Blustery, with a northwest wind 6 to 16 mph becoming south southwest after midnight. Winds could gust as high as 29 mph.
Sunday
A 50 percent chance of snow. Patchy blowing snow after 1pm. Mostly cloudy, with a high near 19. Wind chill values as low as -10. Windy, with a south southwest wind 13 to 18 mph becoming northwest 25 to 30 mph in the afternoon. Winds could gust as high as 43 mph. New snow accumulation of less than a half inch possible.
Sunday Night
Patchy blowing snow. Mostly cloudy, with a low around -6. Wind chill values as low as -30. Windy, with a northwest wind 21 to 30 mph, with gusts as high as 43 mph.
M.L.King Day
Mostly sunny and cold, with a high near 7. Blustery, with a west northwest wind 15 to 20 mph decreasing to 9 to 14 mph in the afternoon. Winds could gust as high as 23 mph.
Monday Night
Partly cloudy, with a low around -2.
Tuesday
Mostly sunny, with a high near 21.
Tuesday Night
A 30 percent chance of snow before midnight. Mostly cloudy, with a low around 13.
Wednesday
Partly sunny, with a high near 21. Blustery.
Wednesday Night
Partly cloudy, with a low around 3.
Thursday
Mostly sunny, with a high near 22.
Thursday Night
Mostly cloudy, with a low around 7.
Friday
Partly sunny, with a high near 15.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Thornton IA
 42.95°N 93.37°W
Last Update:
3:16 pm CST Jan 17, 2026
Forecast Valid:
3pm CST Jan 17, 2026-6pm CST Jan 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