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

Mason City Municipal Airport (KMCW)

Lat: 43.15°NLon: 93.33°WElev: 1188ft.

Light Rain

32°F

0°C

Humidity 92%
Wind Speed S 12 mph
Barometer 30.10 in (1020.1 mb)
Dewpoint 30°F (-1°C)
Visibility 9.00 mi
Wind Chill23°F (-5°C)
Last update 2 Mar 11:53 pm CST
Extended Forecast for

Thornton IA

  • Overnight

    Overnight: A chance of drizzle or freezing rain, mainly before 1am. Mostly cloudy, with a steady temperature around 34. South southeast wind 3 to 7 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 34 °F

    Chance
    Drizzle/Freezing
    Rain

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 42. Light east northeast wind.

    High: 42 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 30. Calm wind.

    Low: 30 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 47. Calm wind becoming southeast around 6 mph in the morning.

    High: 47 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: A 30 percent chance of rain, mainly after midnight. Mostly cloudy, with a low around 36. East southeast wind around 5 mph becoming calm in the evening. New precipitation amounts of less than a tenth of an inch possible.

    Low: 36 °F

    Chance Rain

  • Thursday

    Thursday: A 30 percent chance of rain before noon. Mostly cloudy, with a high near 53.

    High: 53 °F

    Chance Rain
    then Partly
    Sunny

  • Thursday Night

    Thursday Night: Rain likely after midnight. Mostly cloudy, with a low around 41. Chance of precipitation is 60%.

    Low: 41 °F

    Partly Cloudy
    then Rain
    Likely

  • Friday

    Friday: Rain and possibly a thunderstorm. High near 62. Breezy. Chance of precipitation is 90%.

    High: 62 °F

    Rain and
    Breezy

  • Friday Night

    Friday Night: Rain likely and possibly a thunderstorm before midnight, then a chance of rain. Mostly cloudy, with a low around 37. Chance of precipitation is 60%.

    Low: 37 °F

    Rain Likely

Detailed Forecast

Overnight
A chance of drizzle or freezing rain, mainly before 1am. Mostly cloudy, with a steady temperature around 34. South southeast wind 3 to 7 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Tuesday
Mostly cloudy, with a high near 42. Light east northeast wind.
Tuesday Night
Mostly cloudy, with a low around 30. Calm wind.
Wednesday
Mostly sunny, with a high near 47. Calm wind becoming southeast around 6 mph in the morning.
Wednesday Night
A 30 percent chance of rain, mainly after midnight. Mostly cloudy, with a low around 36. East southeast wind around 5 mph becoming calm in the evening. New precipitation amounts of less than a tenth of an inch possible.
Thursday
A 30 percent chance of rain before noon. Mostly cloudy, with a high near 53.
Thursday Night
Rain likely after midnight. Mostly cloudy, with a low around 41. Chance of precipitation is 60%.
Friday
Rain and possibly a thunderstorm. High near 62. Breezy. Chance of precipitation is 90%.
Friday Night
Rain likely and possibly a thunderstorm before midnight, then a chance of rain. Mostly cloudy, with a low around 37. Chance of precipitation is 60%.
Saturday
Mostly sunny, with a high near 51.
Saturday Night
Mostly clear, with a low around 34.
Sunday
Sunny, with a high near 58. Breezy.
Sunday Night
Partly cloudy, with a low around 37.
Monday
Mostly sunny, with a high near 60. 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:
10:52 pm CST Mar 2, 2026
Forecast Valid:
12am CST Mar 3, 2026-6pm CDT Mar 9, 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