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

67°F

19°C

Humidity 76%
Wind Speed N 15 mph
Barometer 29.65 in (1003.5 mb)
Dewpoint 59°F (15°C)
Visibility 10.00 mi
Last update 14 Apr 6:53 pm CDT
Extended Forecast for

Thornton IA

  • Tonight

    Tonight: A slight chance of showers and thunderstorms before 3am, then a chance of showers between 3am and 5am, then a chance of showers and thunderstorms after 5am. Mostly cloudy, with a low around 49. North wind 6 to 11 mph. Chance of precipitation is 30%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 49 °F

    Chance
    T-storms

  • Wednesday

    Wednesday: A 40 percent chance of showers and thunderstorms, mainly after noon. Partly sunny, with a high near 68. North northeast wind 6 to 9 mph becoming east in the afternoon. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 68 °F

    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms before 1am, then a slight chance of showers. Mostly cloudy, with a low around 49. North wind 5 to 8 mph becoming east northeast in the evening. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 49 °F

    Chance
    T-storms

  • Thursday

    Thursday: Sunny, with a high near 76. West northwest wind 6 to 11 mph becoming south southwest in the afternoon.

    High: 76 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 55. South southeast wind 9 to 13 mph.

    Low: 55 °F

    Mostly Clear

  • Friday

    Friday: Showers likely and possibly a thunderstorm after 1pm. Mostly sunny, with a high near 78. Windy. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 78 °F

    Windy. Mostly
    Sunny then
    Showers
    Likely

  • Friday Night

    Friday Night: Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 33. Windy. Chance of precipitation is 60%.

    Low: 33 °F

    Showers
    Likely and
    Windy

  • Saturday

    Saturday: A chance of rain and snow showers before 1pm, then a slight chance of snow showers. Partly sunny, with a high near 44. Windy. Chance of precipitation is 30%.

    High: 44 °F

    Chance
    Rain/Snow and
    Windy

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 29. Windy.

    Low: 29 °F

    Mostly Cloudy
    and Windy
    then Partly
    Cloudy

Detailed Forecast

Tonight
A slight chance of showers and thunderstorms before 3am, then a chance of showers between 3am and 5am, then a chance of showers and thunderstorms after 5am. Mostly cloudy, with a low around 49. North wind 6 to 11 mph. Chance of precipitation is 30%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Wednesday
A 40 percent chance of showers and thunderstorms, mainly after noon. Partly sunny, with a high near 68. North northeast wind 6 to 9 mph becoming east in the afternoon. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Wednesday Night
A chance of showers and thunderstorms before 1am, then a slight chance of showers. Mostly cloudy, with a low around 49. North wind 5 to 8 mph becoming east northeast in the evening. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Thursday
Sunny, with a high near 76. West northwest wind 6 to 11 mph becoming south southwest in the afternoon.
Thursday Night
Mostly clear, with a low around 55. South southeast wind 9 to 13 mph.
Friday
Showers likely and possibly a thunderstorm after 1pm. Mostly sunny, with a high near 78. Windy. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Friday Night
Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 33. Windy. Chance of precipitation is 60%.
Saturday
A chance of rain and snow showers before 1pm, then a slight chance of snow showers. Partly sunny, with a high near 44. Windy. Chance of precipitation is 30%.
Saturday Night
Partly cloudy, with a low around 29. Windy.
Sunday
Sunny, with a high near 51.
Sunday Night
Mostly clear, with a low around 32.
Monday
Sunny, with a high near 60. Breezy.
Monday Night
Partly cloudy, with a low around 42. Breezy.
Tuesday
Sunny, with a high near 68. Windy.
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:
6:52 pm CDT Apr 14, 2026
Forecast Valid:
7pm CDT Apr 14, 2026-6pm CDT Apr 21, 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