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.

Overcast

46°F

8°C

Humidity 83%
Wind Speed SE 8 mph
Barometer 30.01 in (1016.8 mb)
Dewpoint 41°F (5°C)
Visibility 10.00 mi
Wind Chill42°F (6°C)
Last update 4 Mar 3:53 pm CST
Extended Forecast for

Thornton IA

  • This Afternoon

    This Afternoon: Partly sunny, with a steady temperature around 46. East southeast wind 3 to 5 mph.

    High: 46 °F

    Partly Sunny

  • Tonight

    Tonight: Patchy fog before midnight, then patchy fog after 3am. Otherwise, mostly cloudy, with a low around 37. Southeast wind around 5 mph becoming light and variable in the evening.

    Low: 37 °F

    Patchy Fog

  • Thursday

    Thursday: Patchy fog before 10am. Otherwise, partly sunny, with a high near 55. Light east wind becoming east southeast 5 to 10 mph in the morning.

    High: 55 °F

    Patchy Fog
    then Mostly
    Sunny

  • Thursday Night

    Thursday Night: Rain and possibly a thunderstorm after midnight. Low around 43. Southeast wind 8 to 14 mph, with gusts as high as 21 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 43 °F

    Mostly Cloudy
    then Rain

  • Friday

    Friday: Rain and possibly a thunderstorm. High near 63. Southeast wind 13 to 15 mph becoming south southwest in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.

    High: 63 °F

    Rain

  • Friday Night

    Friday Night: Rain before 3am, then a chance of rain and snow. Some thunder is also possible. Low around 30. Blustery. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 30 °F

    Rain and
    Breezy then
    Chance
    Rain/Snow and
    Blustery

  • Saturday

    Saturday: Mostly sunny, with a high near 47. Breezy.

    High: 47 °F

    Mostly Sunny
    and Breezy
    then Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 34. Breezy.

    Low: 34 °F

    Clear then
    Mostly Clear
    and Breezy

  • Sunday

    Sunday: Sunny, with a high near 61. Breezy.

    High: 61 °F

    Sunny and
    Breezy

Detailed Forecast

This Afternoon
Partly sunny, with a steady temperature around 46. East southeast wind 3 to 5 mph.
Tonight
Patchy fog before midnight, then patchy fog after 3am. Otherwise, mostly cloudy, with a low around 37. Southeast wind around 5 mph becoming light and variable in the evening.
Thursday
Patchy fog before 10am. Otherwise, partly sunny, with a high near 55. Light east wind becoming east southeast 5 to 10 mph in the morning.
Thursday Night
Rain and possibly a thunderstorm after midnight. Low around 43. Southeast wind 8 to 14 mph, with gusts as high as 21 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Friday
Rain and possibly a thunderstorm. High near 63. Southeast wind 13 to 15 mph becoming south southwest in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Friday Night
Rain before 3am, then a chance of rain and snow. Some thunder is also possible. Low around 30. Blustery. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Saturday
Mostly sunny, with a high near 47. Breezy.
Saturday Night
Mostly clear, with a low around 34. Breezy.
Sunday
Sunny, with a high near 61. Breezy.
Sunday Night
Mostly clear, with a low around 42.
Monday
Sunny, with a high near 68. Breezy.
Monday Night
Mostly clear, with a low around 39.
Tuesday
A 50 percent chance of rain. Partly sunny, with a high near 54. 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:
3:01 pm CST Mar 4, 2026
Forecast Valid:
3pm CST Mar 4, 2026-6pm CDT Mar 10, 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