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

61°F

16°C

Humidity 93%
Wind Speed SW 14 G 23 mph
Barometer 29.71 in (1005.1 mb)
Dewpoint 59°F (15°C)
Visibility 10.00 mi
Last update 13 Apr 12:53 am CDT
Extended Forecast for

Thornton IA

  • Overnight

    Overnight: Partly cloudy, with a low around 55. Southwest wind 7 to 13 mph.

    Low: 55 °F

    Partly Cloudy

  • Monday

    Monday: A slight chance of showers and thunderstorms between 1pm and 3pm. Partly sunny, with a high near 77. Breezy, with a south wind 6 to 11 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 25 mph. Chance of precipitation is 20%.

    High: 77 °F

    Partly Sunny
    then Slight
    Chance
    T-storms and
    Breezy

  • Monday Night

    Monday Night: A 40 percent chance of showers and thunderstorms, mainly between 8pm and 1am. Partly cloudy, with a low around 54. Breezy, with a south southwest wind 8 to 18 mph, with gusts as high as 25 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 54 °F

    Chance
    T-storms and
    Breezy

  • Tuesday

    Tuesday: A 40 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 77. West wind 6 to 11 mph becoming north in the afternoon. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 77 °F

    Mostly Sunny
    then Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 52. North wind 8 to 10 mph. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 52 °F

    Chance
    T-storms then
    Chance
    Showers

  • Wednesday

    Wednesday: A chance of showers, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 71. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

    High: 71 °F

    Showers
    Likely

  • 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. Chance of precipitation is 50%.

    Low: 49 °F

    Chance
    T-storms

  • Thursday

    Thursday: Mostly sunny, with a high near 76.

    High: 76 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 56. Breezy.

    Low: 56 °F

    Mostly Clear
    then Partly
    Cloudy and
    Breezy

Detailed Forecast

Overnight
Partly cloudy, with a low around 55. Southwest wind 7 to 13 mph.
Monday
A slight chance of showers and thunderstorms between 1pm and 3pm. Partly sunny, with a high near 77. Breezy, with a south wind 6 to 11 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 25 mph. Chance of precipitation is 20%.
Monday Night
A 40 percent chance of showers and thunderstorms, mainly between 8pm and 1am. Partly cloudy, with a low around 54. Breezy, with a south southwest wind 8 to 18 mph, with gusts as high as 25 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tuesday
A 40 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 77. West wind 6 to 11 mph becoming north in the afternoon. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tuesday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 52. North wind 8 to 10 mph. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Wednesday
A chance of showers, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 71. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Wednesday Night
A chance of showers and thunderstorms before 1am, then a slight chance of showers. Mostly cloudy, with a low around 49. Chance of precipitation is 50%.
Thursday
Mostly sunny, with a high near 76.
Thursday Night
Mostly clear, with a low around 56. Breezy.
Friday
Showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 75. Windy. Chance of precipitation is 60%.
Friday Night
A 50 percent chance of showers. Mostly cloudy, with a low around 35. Breezy.
Saturday
A chance of rain and snow showers. Partly sunny, with a high near 48. Breezy. Chance of precipitation is 30%.
Saturday Night
A chance of rain and snow showers. Partly cloudy, with a low around 30. Blustery. Chance of precipitation is 30%.
Sunday
Sunny, with a high near 54. Breezy.
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ABOUT THIS FORECAST

 
Point Forecast:
Thornton IA
 42.95°N 93.37°W
Last Update:
10:52 pm CDT Apr 12, 2026
Forecast Valid:
1am CDT Apr 13, 2026-6pm CDT Apr 19, 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