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

7°F

-14°C

Humidity 80%
Wind Speed W 20 G 29 mph
Barometer 29.81 in (1011.1 mb)
Dewpoint 2°F (-17°C)
Visibility 1.75 mi
Wind Chill-13°F (-25°C)
Last update 17 Jan 1:53 am CST
Extended Forecast for

Thornton IA

  • Overnight

    Overnight: Snow. Low around 6. Wind chill values as low as -15. Blustery, with a northwest wind 14 to 20 mph, with gusts as high as 28 mph. Chance of precipitation is 80%. Total nighttime snow accumulation of less than a half inch possible.

    Low: 6 °F

    Snow and
    Blustery

  • Saturday

    Saturday: Snow likely, mainly before noon. Mostly cloudy and cold, with a high near 9. Wind chill values as low as -15. Windy, with a northwest wind 20 to 24 mph, with gusts as high as 33 mph. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.

    High: 9 °F

    Windy. Snow
    Likely then
    Slight Chance
    Snow

  • Saturday Night

    Saturday Night: A 20 percent chance of snow after 5am. Mostly cloudy, with a low around 2. Wind chill values as low as -15. Blustery, with a northwest wind 7 to 17 mph becoming southwest after midnight. Winds could gust as high as 25 mph.

    Low: 2 °F

    Mostly Cloudy
    and Blustery
    then Slight
    Chance Snow

  • Sunday

    Sunday: Snow likely, mainly before noon. Mostly cloudy, with a high near 20. Wind chill values as low as -10. Windy, with a south southwest wind 11 to 21 mph becoming northwest 21 to 31 mph in the afternoon. Winds could gust as high as 37 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

    High: 20 °F

    Snow Likely
    and Breezy
    then Chance
    Snow and
    Windy

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around -5. Windy, with a northwest wind 26 to 31 mph decreasing to 20 to 25 mph after midnight. Winds could gust as high as 38 mph.

    Low: -5 °F

    Mostly Cloudy
    and Windy

  • M.L.King Day

    M.L.King Day: Mostly sunny and cold, with a high near 8. Blustery.

    High: 8 °F

    Cold and
    Blustery

  • Monday Night

    Monday Night: Mostly clear, with a low around -2.

    Low: -2 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 23.

    High: 23 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 14.

    Low: 14 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Snow. Low around 6. Wind chill values as low as -15. Blustery, with a northwest wind 14 to 20 mph, with gusts as high as 28 mph. Chance of precipitation is 80%. Total nighttime snow accumulation of less than a half inch possible.
Saturday
Snow likely, mainly before noon. Mostly cloudy and cold, with a high near 9. Wind chill values as low as -15. Windy, with a northwest wind 20 to 24 mph, with gusts as high as 33 mph. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.
Saturday Night
A 20 percent chance of snow after 5am. Mostly cloudy, with a low around 2. Wind chill values as low as -15. Blustery, with a northwest wind 7 to 17 mph becoming southwest after midnight. Winds could gust as high as 25 mph.
Sunday
Snow likely, mainly before noon. Mostly cloudy, with a high near 20. Wind chill values as low as -10. Windy, with a south southwest wind 11 to 21 mph becoming northwest 21 to 31 mph in the afternoon. Winds could gust as high as 37 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Sunday Night
Mostly cloudy, with a low around -5. Windy, with a northwest wind 26 to 31 mph decreasing to 20 to 25 mph after midnight. Winds could gust as high as 38 mph.
M.L.King Day
Mostly sunny and cold, with a high near 8. Blustery.
Monday Night
Mostly clear, with a low around -2.
Tuesday
Mostly sunny, with a high near 23.
Tuesday Night
Mostly cloudy, with a low around 14.
Wednesday
Partly sunny, with a high near 21. Blustery.
Wednesday Night
Mostly cloudy, with a low around 5.
Thursday
Mostly sunny, with a high near 17.
Thursday Night
Mostly cloudy, with a low around 4.
Friday
Partly sunny, with a high near 18.
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ABOUT THIS FORECAST

 
Point Forecast:
Thornton IA
 42.95°N 93.37°W
Last Update:
2:36 am CST Jan 17, 2026
Forecast Valid:
2am CST Jan 17, 2026-6pm CST Jan 23, 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