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

83°F

28°C

Humidity 74%
Wind Speed S 8 mph
Barometer 29.81 in (1008.2 mb)
Dewpoint 74°F (23°C)
Visibility 10.00 mi
Heat Index90°F (32°C)
Last update 3 Sep 6:53 pm CDT
Extended Forecast for

Thornton IA

  • Tonight

    Tonight: A slight chance of showers and thunderstorms before 2am, then a slight chance of showers and thunderstorms after 4am. Mostly clear, with a low around 71. South wind around 9 mph. Chance of precipitation is 20%.

    Low: 71 °F

    Mostly Clear
    then Slight
    Chance
    T-storms

  • Friday

    Friday: A 20 percent chance of showers and thunderstorms, mainly between 9am and 10am. Sunny, with a high near 91. South southwest wind 5 to 8 mph.

    High: 91 °F

    Slight Chance
    T-storms then
    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 68. Calm wind.

    Low: 68 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 89. Calm wind becoming east around 5 mph in the afternoon.

    High: 89 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 66. East southeast wind around 6 mph.

    Low: 66 °F

    Partly Cloudy

  • Sunday

    Sunday: A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 83. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 83 °F

    Chance
    Showers

  • Sunday Night

    Sunday Night: A 20 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 64.

    Low: 64 °F

    Partly Cloudy
    then Slight
    Chance
    T-storms

  • Labor Day

    Labor Day: A 20 percent chance of showers before 1pm. Partly sunny, with a high near 83.

    High: 83 °F

    Slight Chance
    Showers

  • Monday Night

    Monday Night: A 40 percent chance of showers after 1am. Partly cloudy, with a low around 68. Breezy.

    Low: 68 °F

    Breezy.
    Partly Cloudy
    then Chance
    Showers

Detailed Forecast

Tonight
A slight chance of showers and thunderstorms before 2am, then a slight chance of showers and thunderstorms after 4am. Mostly clear, with a low around 71. South wind around 9 mph. Chance of precipitation is 20%.
Friday
A 20 percent chance of showers and thunderstorms, mainly between 9am and 10am. Sunny, with a high near 91. South southwest wind 5 to 8 mph.
Friday Night
Mostly clear, with a low around 68. Calm wind.
Saturday
Mostly sunny, with a high near 89. Calm wind becoming east around 5 mph in the afternoon.
Saturday Night
Partly cloudy, with a low around 66. East southeast wind around 6 mph.
Sunday
A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 83. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Sunday Night
A 20 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 64.
Labor Day
A 20 percent chance of showers before 1pm. Partly sunny, with a high near 83.
Monday Night
A 40 percent chance of showers after 1am. Partly cloudy, with a low around 68. Breezy.
Tuesday
A 40 percent chance of showers before 1pm. Partly sunny, with a high near 89.
Tuesday Night
Showers and thunderstorms likely. Partly cloudy, with a low around 68. Chance of precipitation is 60%.
Wednesday
Mostly sunny, with a high near 85.
Wednesday Night
A 30 percent chance of showers. Partly cloudy, with a low around 63.
Thursday
Mostly sunny, with a high near 81.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Thornton IA
 42.93°N 93.37°W
Last Update:
5:36 pm CDT Sep 3, 2026
Forecast Valid:
7pm CDT Sep 3, 2026-6pm CDT Sep 10, 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