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.

Mostly Cloudy

3°F

-16°C

Humidity 62%
Wind Speed W 16 mph
Barometer 30.28 in (1028.2 mb)
Dewpoint -7°F (-22°C)
Visibility 10.00 mi
Wind Chill-16°F (-27°C)
Last update 19 Jan 1:53 pm CST
Extended Forecast for

Thornton IA

  • M.L.King Day

    M.L.King Day: Partly sunny and cold, with a high near 7. Wind chill values as low as -15. Breezy, with a west wind 11 to 16 mph, with gusts as high as 22 mph.

    High: 7 °F

    Cold and
    Breezy

  • Tonight

    Tonight: Mostly cloudy during the early evening, then gradual clearing, with a low around -3. Wind chill values as low as -10. West wind 5 to 9 mph becoming light after midnight.

    Low: -3 °F

    Gradual
    Clearing

  • Tuesday

    Tuesday: A 20 percent chance of snow after noon. Increasing clouds, with a high near 16. Wind chill values as low as -5. Light and variable wind becoming south 5 to 9 mph in the morning.

    High: 16 °F

    Sunny then
    Slight Chance
    Snow

  • Tuesday Night

    Tuesday Night: Snow, mainly before midnight. Low around 10. Wind chill values as low as zero. Southeast wind 5 to 9 mph becoming light and variable. Chance of precipitation is 80%. New snow accumulation of 1 to 3 inches possible.

    Low: 10 °F

    Snow then
    Slight Chance
    Snow

  • Wednesday

    Wednesday: A 30 percent chance of snow after noon. Partly sunny, with a high near 26. Breezy, with a west wind 10 to 18 mph, with gusts as high as 23 mph. Little or no snow accumulation expected.

    High: 26 °F

    Partly Sunny
    then Chance
    Snow and
    Breezy

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 4. Blustery.

    Low: 4 °F

    Mostly Cloudy
    and Blustery
    then Partly
    Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 15.

    High: 15 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around -13.

    Low: -13 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly sunny and cold, with a high near -6.

    High: -6 °F

    Cold

Detailed Forecast

M.L.King Day
Partly sunny and cold, with a high near 7. Wind chill values as low as -15. Breezy, with a west wind 11 to 16 mph, with gusts as high as 22 mph.
Tonight
Mostly cloudy during the early evening, then gradual clearing, with a low around -3. Wind chill values as low as -10. West wind 5 to 9 mph becoming light after midnight.
Tuesday
A 20 percent chance of snow after noon. Increasing clouds, with a high near 16. Wind chill values as low as -5. Light and variable wind becoming south 5 to 9 mph in the morning.
Tuesday Night
Snow, mainly before midnight. Low around 10. Wind chill values as low as zero. Southeast wind 5 to 9 mph becoming light and variable. Chance of precipitation is 80%. New snow accumulation of 1 to 3 inches possible.
Wednesday
A 30 percent chance of snow after noon. Partly sunny, with a high near 26. Breezy, with a west wind 10 to 18 mph, with gusts as high as 23 mph. Little or no snow accumulation expected.
Wednesday Night
Partly cloudy, with a low around 4. Blustery.
Thursday
Mostly sunny, with a high near 15.
Thursday Night
Mostly cloudy, with a low around -13.
Friday
Mostly sunny and cold, with a high near -6.
Friday Night
Partly cloudy, with a low around -20.
Saturday
Mostly sunny and cold, with a high near -3.
Saturday Night
Partly cloudy, with a low around -9.
Sunday
Mostly sunny, with a high near 12.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Thornton IA
 42.95°N 93.37°W
Last Update:
11:12 am CST Jan 19, 2026
Forecast Valid:
2pm CST Jan 19, 2026-6pm CST Jan 25, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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