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

Heavy Rainfall Threat Continues in the Southwest on Monday; Record Warmth in the Plains and Midwest

Remnant moisture from Tropical Storm Rachel will persist over portions of the Great Basin and Southwest on Monday, bringing a potential heavy to excessive rainfall risk. Well above average and potentially record breaking temperatures will develop across the Plains and Midwest early this week, spreading into the Lower Mississippi Valley and Southeast midweek. Read More >

Current conditions at

Mason City Municipal Airport (KMCW)

Lat: 43.15°NLon: 93.33°WElev: 1188ft.

Fair

70°F

21°C

Humidity 61%
Wind Speed S 9 mph
Barometer 29.76 in (1006.2 mb)
Dewpoint 56°F (13°C)
Visibility 10.00 mi
Last update 12 Oct 1:53 am CDT
Extended Forecast for

Thornton IA

  • Overnight

    Overnight: Partly cloudy, with a low around 66. South southwest wind around 10 mph.

    Low: 66 °F

    Partly Cloudy

  • Columbus Day

    Columbus Day: Mostly sunny, with a high near 88. South southwest wind 9 to 15 mph, with gusts as high as 24 mph.

    High: 88 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 56. Southwest wind 8 to 10 mph becoming northwest after midnight.

    Low: 56 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 73. North northwest wind 5 to 7 mph.

    High: 73 °F

    Sunny

  • Tuesday Night

    Tuesday Night: A 20 percent chance of showers before 1am. Partly cloudy, with a low around 51. North wind around 6 mph.

    Low: 51 °F

    Slight Chance
    Showers

  • Wednesday

    Wednesday: Mostly sunny, with a high near 67.

    High: 67 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: A 50 percent chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 49.

    Low: 49 °F

    Mostly Cloudy
    then Chance
    Showers

  • Thursday

    Thursday: Showers likely. Mostly cloudy, with a high near 64. Chance of precipitation is 70%.

    High: 64 °F

    Showers
    Likely

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 41. Breezy.

    Low: 41 °F

    Mostly Cloudy
    then Partly
    Cloudy and
    Breezy

Detailed Forecast

Overnight
Partly cloudy, with a low around 66. South southwest wind around 10 mph.
Columbus Day
Mostly sunny, with a high near 88. South southwest wind 9 to 15 mph, with gusts as high as 24 mph.
Monday Night
Mostly clear, with a low around 56. Southwest wind 8 to 10 mph becoming northwest after midnight.
Tuesday
Sunny, with a high near 73. North northwest wind 5 to 7 mph.
Tuesday Night
A 20 percent chance of showers before 1am. Partly cloudy, with a low around 51. North wind around 6 mph.
Wednesday
Mostly sunny, with a high near 67.
Wednesday Night
A 50 percent chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 49.
Thursday
Showers likely. Mostly cloudy, with a high near 64. Chance of precipitation is 70%.
Thursday Night
Mostly cloudy, with a low around 41. Breezy.
Friday
Mostly sunny, with a high near 55. Windy.
Friday Night
Mostly clear, with a low around 33.
Saturday
Sunny, with a high near 58.
Saturday Night
Mostly clear, with a low around 39.
Sunday
Sunny, with a high near 65. Breezy.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Thornton IA
 42.95°N 93.4°W
Last Update:
1:27 am CDT Oct 12, 2026
Forecast Valid:
2am CDT Oct 12, 2026-6pm CDT Oct 18, 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