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.

Fair

34°F

1°C

Humidity 97%
Wind Speed S 6 mph
Barometer 29.94 in (1014.5 mb)
Dewpoint 33°F (1°C)
Visibility 8.00 mi
Wind Chill29°F (-2°C)
Last update 18 Mar 11:53 pm CDT
Extended Forecast for

Thornton IA

  • Overnight

    Overnight: Mostly cloudy, with a low around 32. South southwest wind around 6 mph becoming west northwest.

    Low: 32 °F

    Mostly Cloudy

  • Thursday

    Thursday: Patchy fog before 11am. Otherwise, mostly sunny, with a high near 52. North northwest wind around 5 mph becoming light and variable.

    High: 52 °F

    Patchy Fog
    then Mostly
    Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 40. South southwest wind 6 to 10 mph.

    Low: 40 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 66. Northwest wind 9 to 11 mph.

    High: 66 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 40. Northwest wind around 6 mph becoming southwest after midnight.

    Low: 40 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 74.

    High: 74 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 39. Breezy.

    Low: 39 °F

    Mostly Clear
    then Partly
    Cloudy and
    Breezy

  • Sunday

    Sunday: Mostly cloudy, with a high near 48. Breezy.

    High: 48 °F

    Mostly Cloudy
    and Breezy

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 25. Blustery.

    Low: 25 °F

    Mostly Cloudy
    and Blustery
    then Mostly
    Cloudy

Detailed Forecast

Overnight
Mostly cloudy, with a low around 32. South southwest wind around 6 mph becoming west northwest.
Thursday
Patchy fog before 11am. Otherwise, mostly sunny, with a high near 52. North northwest wind around 5 mph becoming light and variable.
Thursday Night
Mostly cloudy, with a low around 40. South southwest wind 6 to 10 mph.
Friday
Mostly sunny, with a high near 66. Northwest wind 9 to 11 mph.
Friday Night
Partly cloudy, with a low around 40. Northwest wind around 6 mph becoming southwest after midnight.
Saturday
Sunny, with a high near 74.
Saturday Night
Partly cloudy, with a low around 39. Breezy.
Sunday
Mostly cloudy, with a high near 48. Breezy.
Sunday Night
Mostly cloudy, with a low around 25. Blustery.
Monday
Mostly sunny, with a high near 46.
Monday Night
Mostly cloudy, with a low around 31.
Tuesday
Mostly cloudy, with a high near 51.
Tuesday Night
Mostly cloudy, with a low around 34.
Wednesday
Mostly cloudy, with a high near 60. Breezy.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Thornton IA
 42.95°N 93.37°W
Last Update:
10:16 pm CDT Mar 18, 2026
Forecast Valid:
12am CDT Mar 19, 2026-6pm CDT Mar 25, 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