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

22°F

-6°C

Humidity 75%
Wind Speed SW 10 mph
Barometer 30.39 in (1030.7 mb)
Dewpoint 15°F (-9°C)
Visibility 10.00 mi
Wind Chill11°F (-12°C)
Last update 11 Jan 11:53 am CST
Extended Forecast for

Grafton IA

  • This Afternoon

    This Afternoon: Partly sunny, with a high near 28. Southwest wind 8 to 11 mph, with gusts as high as 23 mph.

    High: 28 °F

    Partly Sunny

  • Tonight

    Tonight: Increasing clouds, with a low around 24. South southwest wind 7 to 14 mph becoming west northwest after midnight. Winds could gust as high as 23 mph.

    Low: 24 °F

    Increasing
    Clouds

  • Monday

    Monday: Patchy fog before 9am. Otherwise, mostly sunny, with a high near 40. West southwest wind 6 to 9 mph.

    High: 40 °F

    Patchy Fog
    then Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 31. Southwest wind 6 to 14 mph, with gusts as high as 20 mph.

    Low: 31 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 44. Breezy, with a west wind 14 to 17 mph, with gusts as high as 25 mph.

    High: 44 °F

    Mostly Sunny
    and Breezy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 21. Windy.

    Low: 21 °F

    Mostly Cloudy
    and Windy

  • Wednesday

    Wednesday: Partly sunny, with a high near 25. Windy.

    High: 25 °F

    Partly Sunny
    and Windy

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 14.

    Low: 14 °F

    Partly Cloudy

  • Thursday

    Thursday: A 40 percent chance of snow after noon. Mostly cloudy, with a high near 31.

    High: 31 °F

    Partly Sunny
    then Chance
    Snow

Detailed Forecast

This Afternoon
Partly sunny, with a high near 28. Southwest wind 8 to 11 mph, with gusts as high as 23 mph.
Tonight
Increasing clouds, with a low around 24. South southwest wind 7 to 14 mph becoming west northwest after midnight. Winds could gust as high as 23 mph.
Monday
Patchy fog before 9am. Otherwise, mostly sunny, with a high near 40. West southwest wind 6 to 9 mph.
Monday Night
Mostly cloudy, with a low around 31. Southwest wind 6 to 14 mph, with gusts as high as 20 mph.
Tuesday
Mostly sunny, with a high near 44. Breezy, with a west wind 14 to 17 mph, with gusts as high as 25 mph.
Tuesday Night
Mostly cloudy, with a low around 21. Windy.
Wednesday
Partly sunny, with a high near 25. Windy.
Wednesday Night
Partly cloudy, with a low around 14.
Thursday
A 40 percent chance of snow after noon. Mostly cloudy, with a high near 31.
Thursday Night
A 40 percent chance of snow. Mostly cloudy, with a low around 22.
Friday
A 40 percent chance of snow. Mostly cloudy, with a high near 28. Blustery.
Friday Night
Mostly cloudy, with a low around 8. Blustery.
Saturday
Mostly cloudy, with a high near 14.
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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:
11:17 am CST Jan 11, 2026
Forecast Valid:
12pm CST Jan 11, 2026-6pm CST Jan 17, 2026
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation