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Severe Thunderstorms and Heavy Rainfall; Typhoon Watch in Guam and CNMI

Heavy to excessive rainfall will continue through tonight from the Texas Big Bend region into southern Oklahoma. Scattered damaging wind gusts and a few tornadoes may accompany a line of severe thunderstorms that is expected across the Mid-Atlantic into New England Friday. A Typhoon Watch continues for Guam and CNMI as Tropical Storm Champi will strengthen and approach the islands this weekend. Read More >

Hazardous Weather Conditions

Current conditions at

Mason City Municipal Airport (KMCW)

Lat: 43.15°NLon: 93.33°WElev: 1188ft.

Fair and Breezy

46°F

8°C

Humidity 79%
Wind Speed NW 21 G 29 mph
Barometer 30.06 in (1017.8 mb)
Dewpoint 40°F (4°C)
Visibility 10.00 mi
Wind Chill38°F (3°C)
Last update 15 Oct 9:53 pm CDT
Extended Forecast for

Sheffield IA

Freeze Watch October 17, 01:00am until October 17, 09:00am
Click here for hazard details and duration
Freeze Watch

  • Tonight

    Tonight: A 20 percent chance of rain after 3am. Increasing clouds, with a steady temperature around 45. Breezy, with a northwest wind 15 to 20 mph, with gusts as high as 29 mph.

    Low: 45 °F

    Breezy.
    Mostly Cloudy
    then Slight
    Chance Rain

  • Friday

    Friday: A 30 percent chance of rain, mainly before 9am. Cloudy, with a high near 50. Windy, with a north wind 20 to 26 mph, with gusts as high as 39 mph. New precipitation amounts of less than a tenth of an inch possible.

    High: 50 °F

    Windy. Chance
    Rain then
    Mostly Cloudy

  • Friday Night

    Friday Night: Widespread frost, mainly after 1am. Otherwise, mostly clear, with a low around 29. North wind 5 to 8 mph becoming calm in the evening.

    Low: 29 °F

    Frost

  • Saturday

    Saturday: Widespread frost before 9am. Otherwise, sunny, with a high near 57. Light southwest wind becoming south southwest 9 to 14 mph in the morning. Winds could gust as high as 21 mph.

    High: 57 °F

    Frost then
    Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 38. South southwest wind around 10 mph.

    Low: 38 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 65. Breezy.

    High: 65 °F

    Sunny and
    Breezy

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 42.

    Low: 42 °F

    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 66.

    High: 66 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 43.

    Low: 43 °F

    Partly Cloudy

Detailed Forecast

Tonight
A 20 percent chance of rain after 3am. Increasing clouds, with a steady temperature around 45. Breezy, with a northwest wind 15 to 20 mph, with gusts as high as 29 mph.
Friday
A 30 percent chance of rain, mainly before 9am. Cloudy, with a high near 50. Windy, with a north wind 20 to 26 mph, with gusts as high as 39 mph. New precipitation amounts of less than a tenth of an inch possible.
Friday Night
Widespread frost, mainly after 1am. Otherwise, mostly clear, with a low around 29. North wind 5 to 8 mph becoming calm in the evening.
Saturday
Widespread frost before 9am. Otherwise, sunny, with a high near 57. Light southwest wind becoming south southwest 9 to 14 mph in the morning. Winds could gust as high as 21 mph.
Saturday Night
Clear, with a low around 38. South southwest wind around 10 mph.
Sunday
Sunny, with a high near 65. Breezy.
Sunday Night
Mostly clear, with a low around 42.
Monday
Mostly sunny, with a high near 66.
Monday Night
Partly cloudy, with a low around 43.
Tuesday
Mostly sunny, with a high near 70.
Tuesday Night
Mostly clear, with a low around 48.
Wednesday
Mostly sunny, with a high near 73.
Wednesday Night
A 30 percent chance of showers. Partly cloudy, with a low around 53.
Thursday
A 30 percent chance of showers. Partly sunny, with a high near 73.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Sheffield IA
 42.89°N 93.23°W
Last Update:
9:56 pm CDT Oct 15, 2026
Forecast Valid:
10pm CDT Oct 15, 2026-6pm CDT Oct 22, 2026
 
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Additional Resources

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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