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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.

Overcast

45°F

7°C

Humidity 90%
Wind Speed W 18 G 26 mph
Barometer 30.08 in (1018.5 mb)
Dewpoint 42°F (6°C)
Visibility 10.00 mi
Wind Chill37°F (3°C)
Last update 16 Oct 1:53 am CDT
Extended Forecast for

Grafton IA

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

  • Overnight

    Overnight: A 30 percent chance of showers, mainly after 4am. Mostly cloudy, with a low around 42. Breezy, with a west northwest wind 16 to 18 mph, with gusts as high as 28 mph. New precipitation amounts of less than a tenth of an inch possible.

    Low: 42 °F

    Chance
    Showers and
    Breezy

  • Friday

    Friday: A 40 percent chance of showers between 8am and 10am. Cloudy, then gradually becoming mostly sunny, with a high near 50. Windy, with a north wind 17 to 26 mph, with gusts as high as 41 mph. New precipitation amounts of less than a tenth of an inch possible.

    High: 50 °F

    Windy. Chance
    Showers then
    Partly Sunny

  • Friday Night

    Friday Night: Widespread frost, mainly after 2am. Otherwise, clear, with a low around 29. North northwest wind 5 to 8 mph becoming calm in the evening.

    Low: 29 °F

    Frost

  • Saturday

    Saturday: Widespread frost, mainly before 9am. Otherwise, sunny, with a high near 56. Breezy, with a south southwest wind 5 to 10 mph increasing to 11 to 16 mph in the afternoon. Winds could gust as high as 24 mph.

    High: 56 °F

    Frost then
    Sunny and
    Breezy

  • Saturday Night

    Saturday Night: Clear, with a low around 38. South southwest wind around 14 mph, with gusts as high as 22 mph.

    Low: 38 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 63. Breezy.

    High: 63 °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 64.

    High: 64 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 42.

    Low: 42 °F

    Partly Cloudy

Detailed Forecast

Overnight
A 30 percent chance of showers, mainly after 4am. Mostly cloudy, with a low around 42. Breezy, with a west northwest wind 16 to 18 mph, with gusts as high as 28 mph. New precipitation amounts of less than a tenth of an inch possible.
Friday
A 40 percent chance of showers between 8am and 10am. Cloudy, then gradually becoming mostly sunny, with a high near 50. Windy, with a north wind 17 to 26 mph, with gusts as high as 41 mph. New precipitation amounts of less than a tenth of an inch possible.
Friday Night
Widespread frost, mainly after 2am. Otherwise, clear, with a low around 29. North northwest wind 5 to 8 mph becoming calm in the evening.
Saturday
Widespread frost, mainly before 9am. Otherwise, sunny, with a high near 56. Breezy, with a south southwest wind 5 to 10 mph increasing to 11 to 16 mph in the afternoon. Winds could gust as high as 24 mph.
Saturday Night
Clear, with a low around 38. South southwest wind around 14 mph, with gusts as high as 22 mph.
Sunday
Sunny, with a high near 63. Breezy.
Sunday Night
Mostly clear, with a low around 42.
Monday
Mostly sunny, with a high near 64.
Monday Night
Partly cloudy, with a low around 42.
Tuesday
Mostly sunny, with a high near 69.
Tuesday Night
Partly cloudy, with a low around 48.
Wednesday
Mostly sunny, with a high near 72.
Wednesday Night
Partly cloudy, with a low around 53.
Thursday
Partly sunny, with a high near 72.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Grafton IA
 43.34°N 93.07°W
Last Update:
1:26 am CDT Oct 16, 2026
Forecast Valid:
2am CDT Oct 16, 2026-6pm CDT Oct 22, 2026
 
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Additional Resources

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High Temperature

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Chance of Precipitation