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.

Fair

63°F

17°C

Humidity 93%
Wind Speed S 3 mph
Barometer 30.09 in (1018.1 mb)
Dewpoint 61°F (16°C)
Visibility 10.00 mi
Last update 24 Aug 10:53 pm CDT
Extended Forecast for

Grafton IA

  • Tonight

    Tonight: Mostly cloudy, with a low around 62. Calm wind becoming south around 5 mph after midnight.

    Low: 62 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 83. South southwest wind 6 to 13 mph, with gusts as high as 18 mph.

    High: 83 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, then gradually becoming clear, with a low around 63. South southwest wind 7 to 9 mph becoming west northwest after midnight.

    Low: 63 °F

    Decreasing
    Clouds

  • Wednesday

    Wednesday: Sunny, with a high near 80. Breezy, with a northwest wind 8 to 16 mph, with gusts as high as 24 mph.

    High: 80 °F

    Sunny then
    Sunny and
    Breezy

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 59. Northwest wind 5 to 10 mph.

    Low: 59 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 80.

    High: 80 °F

    Sunny

  • Thursday Night

    Thursday Night: Clear, with a low around 56.

    Low: 56 °F

    Clear

  • Friday

    Friday: Sunny, with a high near 82.

    High: 82 °F

    Sunny

  • Friday Night

    Friday Night: A 40 percent chance of showers after 1am. Mostly cloudy, with a low around 63.

    Low: 63 °F

    Partly Cloudy
    then Chance
    Showers

Detailed Forecast

Tonight
Mostly cloudy, with a low around 62. Calm wind becoming south around 5 mph after midnight.
Tuesday
Mostly sunny, with a high near 83. South southwest wind 6 to 13 mph, with gusts as high as 18 mph.
Tuesday Night
Mostly cloudy, then gradually becoming clear, with a low around 63. South southwest wind 7 to 9 mph becoming west northwest after midnight.
Wednesday
Sunny, with a high near 80. Breezy, with a northwest wind 8 to 16 mph, with gusts as high as 24 mph.
Wednesday Night
Mostly clear, with a low around 59. Northwest wind 5 to 10 mph.
Thursday
Sunny, with a high near 80.
Thursday Night
Clear, with a low around 56.
Friday
Sunny, with a high near 82.
Friday Night
A 40 percent chance of showers after 1am. Mostly cloudy, with a low around 63.
Saturday
A 40 percent chance of showers before 1pm. Partly sunny, with a high near 82. Breezy.
Saturday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 66. Breezy.
Sunday
Partly sunny, with a high near 86.
Sunday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 67.
Monday
A 30 percent chance of showers. Partly sunny, with a high near 83.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Grafton IA
 43.34°N 93.07°W
Last Update:
10:36 pm CDT Aug 24, 2026
Forecast Valid:
11pm CDT Aug 24, 2026-6pm CDT Aug 31, 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