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Hazardous Weather Conditions

Current conditions at

Mason City Municipal Airport (KMCW)

Lat: 43.15°NLon: 93.33°WElev: 1188ft.

A Few Clouds

84°F

29°C

Humidity 67%
Wind Speed E 5 mph
Barometer 29.98 in (1013.7 mb)
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Heat Index90°F (32°C)
Last update 1 Sep 11:53 am CDT
Extended Forecast for

Thornton IA

  • This Afternoon

    This Afternoon: Partly sunny, with a high near 88. Calm wind becoming south southeast around 5 mph.

    High: 88 °F

    Partly Sunny

  • Tonight

    Tonight: A 20 percent chance of showers and thunderstorms after 1am. Increasing clouds, with a low around 68. Light and variable wind becoming west northwest around 6 mph in the evening.

    Low: 68 °F

    Partly Cloudy
    then Slight
    Chance
    T-storms

  • Wednesday

    Wednesday: Mostly sunny, with a high near 88. Southeast wind 6 to 8 mph becoming southwest in the morning.

    High: 88 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: A 50 percent chance of showers and thunderstorms after 1am. Increasing clouds, with a low around 69. Calm wind becoming south southeast around 5 mph after midnight. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 69 °F

    Partly Cloudy
    then Chance
    T-storms

  • Thursday

    Thursday: Showers likely and possibly a thunderstorm before 1pm. Mostly sunny, with a high near 87. East wind 5 to 11 mph becoming south in the afternoon. Winds could gust as high as 18 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 87 °F

    Showers
    Likely

  • Thursday Night

    Thursday Night: A 50 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 72. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 72 °F

    Mostly Clear
    then Chance
    T-storms

  • Friday

    Friday: A 30 percent chance of showers and thunderstorms before 1pm. Mostly sunny, with a high near 90.

    High: 90 °F

    Chance
    T-storms

  • Friday Night

    Friday Night: Mostly clear, with a low around 70.

    Low: 70 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 91.

    High: 91 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Partly sunny, with a high near 88. Calm wind becoming south southeast around 5 mph.
Tonight
A 20 percent chance of showers and thunderstorms after 1am. Increasing clouds, with a low around 68. Light and variable wind becoming west northwest around 6 mph in the evening.
Wednesday
Mostly sunny, with a high near 88. Southeast wind 6 to 8 mph becoming southwest in the morning.
Wednesday Night
A 50 percent chance of showers and thunderstorms after 1am. Increasing clouds, with a low around 69. Calm wind becoming south southeast around 5 mph after midnight. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Thursday
Showers likely and possibly a thunderstorm before 1pm. Mostly sunny, with a high near 87. East wind 5 to 11 mph becoming south in the afternoon. Winds could gust as high as 18 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Thursday Night
A 50 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 72. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Friday
A 30 percent chance of showers and thunderstorms before 1pm. Mostly sunny, with a high near 90.
Friday Night
Mostly clear, with a low around 70.
Saturday
Mostly sunny, with a high near 91.
Saturday Night
A 30 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 68.
Sunday
Mostly sunny, with a high near 86.
Sunday Night
Partly cloudy, with a low around 64.
Labor Day
Partly sunny, with a high near 82.
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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:
12:11 pm CDT Sep 1, 2026
Forecast Valid:
12pm CDT Sep 1, 2026-6pm CDT Sep 7, 2026
 
Forecast Discussion
 
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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