National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Threats For Heavy Rain and Severe Thunderstorms Continue in the Plains; Fire Weather Conditions Worsen in the Southwest

On Monday and Tuesday, the focus for heavy rain and severe thunderstorms will continue in the Plains and central Mississippi River Valley. Meanwhile, hot conditions and Critical Fire Weather looms over the Great Basin and Southwest U.S. through midweek. Read More >

Hazardous Weather Conditions

Current conditions at

Mason City Municipal Airport (KMCW)

Lat: 43.15°NLon: 93.33°WElev: 1188ft.

Fair

72°F

22°C

Humidity 91%
Wind Speed Calm
Barometer 30.02 in (1015.7 mb)
Dewpoint 69°F (21°C)
Visibility 10.00 mi
Last update 15 Jun 8:53 pm CDT
Extended Forecast for

Thornton IA

  • Tonight

    Tonight: Scattered showers and thunderstorms, mainly after 3am. Mostly cloudy, with a low around 65. Light and variable wind becoming southeast around 6 mph in the evening. Chance of precipitation is 40%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 65 °F

    Scattered
    T-storms

  • Monday

    Monday: Scattered showers and thunderstorms, mainly before 10am. Partly sunny, with a high near 86. South wind 7 to 14 mph, with gusts as high as 20 mph. Chance of precipitation is 30%. New rainfall amounts between a quarter and half of an inch possible.

    High: 86 °F

    Scattered
    T-storms

  • Monday Night

    Monday Night: Showers and thunderstorms likely, mainly before 1am. Mostly cloudy, with a low around 66. South wind 8 to 11 mph, with gusts 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.

    Low: 66 °F

    T-storms
    Likely

  • Tuesday

    Tuesday: Showers and thunderstorms likely, mainly after 1pm. Partly sunny, with a high near 80. West northwest wind around 8 mph becoming north in the afternoon. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

    High: 80 °F

    T-storms
    Likely

  • Tuesday Night

    Tuesday Night: Showers and possibly a thunderstorm. Low around 62. East northeast wind around 7 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 62 °F

    T-storms then
    Showers

  • Wednesday

    Wednesday: A chance of showers, with thunderstorms also possible after 10am. Partly sunny, with a high near 79. Chance of precipitation is 50%. New rainfall amounts between a quarter and half of an inch possible.

    High: 79 °F

    Chance
    Showers then
    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 59.

    Low: 59 °F

    Slight Chance
    T-storms

  • Juneteenth

    Juneteenth: Sunny, with a high near 82.

    High: 82 °F

    Sunny

  • Thursday Night

    Thursday Night: A 30 percent chance of showers after 1am. Mostly clear, with a low around 62.

    Low: 62 °F

    Mostly Clear
    then Chance
    Showers

Detailed Forecast

Tonight
Scattered showers and thunderstorms, mainly after 3am. Mostly cloudy, with a low around 65. Light and variable wind becoming southeast around 6 mph in the evening. Chance of precipitation is 40%. New rainfall amounts between a quarter and half of an inch possible.
Monday
Scattered showers and thunderstorms, mainly before 10am. Partly sunny, with a high near 86. South wind 7 to 14 mph, with gusts as high as 20 mph. Chance of precipitation is 30%. New rainfall amounts between a quarter and half of an inch possible.
Monday Night
Showers and thunderstorms likely, mainly before 1am. Mostly cloudy, with a low around 66. South wind 8 to 11 mph, with gusts 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.
Tuesday
Showers and thunderstorms likely, mainly after 1pm. Partly sunny, with a high near 80. West northwest wind around 8 mph becoming north in the afternoon. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Tuesday Night
Showers and possibly a thunderstorm. Low around 62. East northeast wind around 7 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Wednesday
A chance of showers, with thunderstorms also possible after 10am. Partly sunny, with a high near 79. Chance of precipitation is 50%. New rainfall amounts between a quarter and half of an inch possible.
Wednesday Night
A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 59.
Juneteenth
Sunny, with a high near 82.
Thursday Night
A 30 percent chance of showers after 1am. Mostly clear, with a low around 62.
Friday
Sunny, with a high near 86. Windy.
Friday Night
Partly cloudy, with a low around 71. Windy.
Saturday
Sunny, with a high near 92. Breezy.
Saturday Night
Mostly clear, with a low around 72. Breezy.
Sunday
Sunny, with a high near 89. Windy.
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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:
9:11 pm CDT Jun 15, 2025
Forecast Valid:
9pm CDT Jun 15, 2025-6pm CDT Jun 22, 2025
 
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