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

0°F

-18°C

Humidity 79%
Wind Speed W 10 mph
Barometer 30.25 in (1027.1 mb)
Dewpoint -5°F (-21°C)
Visibility 10.00 mi
Wind Chill-16°F (-27°C)
Last update 27 Jan 11:53 pm CST
Extended Forecast for

Thornton IA

  • Overnight

    Overnight: Partly cloudy, with a steady temperature around 2. Wind chill values as low as -15. West wind around 8 mph.

    Low: 2 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Partly sunny, then gradually becoming sunny, with a high near 13. Wind chill values as low as -10. Northwest wind 8 to 13 mph, with gusts as high as 18 mph.

    High: 13 °F

    Becoming
    Sunny

  • Wednesday Night

    Wednesday Night: Increasing clouds, with a low around -4. Wind chill values as low as -15. North northwest wind 3 to 6 mph.

    Low: -4 °F

    Increasing
    Clouds

  • Thursday

    Thursday: Mostly sunny and cold, with a high near 8. Wind chill values as low as -10. North northwest wind 3 to 7 mph.

    High: 8 °F

    Cold

  • Thursday Night

    Thursday Night: Mostly clear, with a low around -7. North wind around 7 mph.

    Low: -7 °F

    Mostly Clear

  • Friday

    Friday: Sunny and cold, with a high near 6.

    High: 6 °F

    Cold

  • Friday Night

    Friday Night: Mostly clear, with a low around -6.

    Low: -6 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 15.

    High: 15 °F

    Sunny

  • Saturday Night

    Saturday Night: A 30 percent chance of snow after midnight. Mostly cloudy, with a low around 5.

    Low: 5 °F

    Partly Cloudy
    then Chance
    Snow

Detailed Forecast

Overnight
Partly cloudy, with a steady temperature around 2. Wind chill values as low as -15. West wind around 8 mph.
Wednesday
Partly sunny, then gradually becoming sunny, with a high near 13. Wind chill values as low as -10. Northwest wind 8 to 13 mph, with gusts as high as 18 mph.
Wednesday Night
Increasing clouds, with a low around -4. Wind chill values as low as -15. North northwest wind 3 to 6 mph.
Thursday
Mostly sunny and cold, with a high near 8. Wind chill values as low as -10. North northwest wind 3 to 7 mph.
Thursday Night
Mostly clear, with a low around -7. North wind around 7 mph.
Friday
Sunny and cold, with a high near 6.
Friday Night
Mostly clear, with a low around -6.
Saturday
Sunny, with a high near 15.
Saturday Night
A 30 percent chance of snow after midnight. Mostly cloudy, with a low around 5.
Sunday
A 50 percent chance of snow. Partly sunny, with a high near 24.
Sunday Night
Mostly cloudy, with a low around 13.
Monday
Partly sunny, with a high near 24.
Monday Night
Mostly cloudy, with a low around 9.
Tuesday
Partly sunny, with a high near 24.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Thornton IA
 42.95°N 93.37°W
Last Update:
10:12 pm CST Jan 27, 2026
Forecast Valid:
12am CST Jan 28, 2026-6pm CST Feb 3, 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