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

Hazardous Weather Conditions

Current conditions at

Mason City Municipal Airport (KMCW)

Lat: 43.15°NLon: 93.33°WElev: 1188ft.

Overcast

-3°F

-19°C

Humidity 79%
Wind Speed N 5 mph
Barometer 30.33 in (1029.9 mb)
Dewpoint -8°F (-22°C)
Visibility 10.00 mi
Wind Chill-14°F (-26°C)
Last update 7 Dec 7:53 pm CST
Extended Forecast for

Grafton IA

  • Tonight

    Tonight: A chance of flurries between 11pm and midnight, then a chance of snow after midnight. Mostly cloudy, with a temperature rising to around 6 by 4am. Wind chill values as low as -10. Calm wind becoming south southeast 5 to 8 mph after midnight. Chance of precipitation is 30%. Total nighttime snow accumulation of less than a half inch possible.

    Low: -1 °F⇑

    Mostly Cloudy
    then Chance
    Snow

  • Monday

    Monday: Snow likely before 11am, then a chance of flurries between 11am and noon. Mostly cloudy, with a high near 21. Wind chill values as low as -5. South wind 8 to 14 mph, with gusts as high as 22 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

    High: 21 °F

    Snow Likely
    then Mostly
    Cloudy

  • Monday Night

    Monday Night: Mostly cloudy, with a temperature rising to around 26 by 5am. Wind chill values as low as zero. South wind 9 to 14 mph becoming west after midnight. Winds could gust as high as 23 mph.

    Low: 16 °F⇑

    Mostly Cloudy

  • Tuesday

    Tuesday: A chance of snow after noon, mixing with rain after 3pm. Mostly cloudy, with a high near 39. West wind 8 to 15 mph becoming south in the afternoon. Winds could gust as high as 24 mph. Chance of precipitation is 30%. Little or no snow accumulation expected.

    High: 39 °F

    Mostly Cloudy
    then Chance
    Rain/Snow

  • Tuesday Night

    Tuesday Night: A 40 percent chance of rain before midnight. Mostly cloudy, with a low around 18. Windy, with a south southwest wind 21 to 29 mph becoming northwest after midnight. Winds could gust as high as 38 mph. New precipitation amounts of less than a tenth of an inch possible.

    Low: 18 °F

    Windy. Chance
    Rain then
    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 24. Windy.

    High: 24 °F

    Mostly Cloudy
    and Windy

  • Wednesday Night

    Wednesday Night: A 20 percent chance of snow after midnight. Mostly cloudy, with a low around 5.

    Low: 5 °F

    Mostly Cloudy
    then Slight
    Chance Snow

  • Thursday

    Thursday: A 40 percent chance of snow. Mostly cloudy, with a high near 16.

    High: 16 °F

    Chance Snow

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around -4.

    Low: -4 °F

    Mostly Cloudy

Detailed Forecast

Tonight
A chance of flurries between 11pm and midnight, then a chance of snow after midnight. Mostly cloudy, with a temperature rising to around 6 by 4am. Wind chill values as low as -10. Calm wind becoming south southeast 5 to 8 mph after midnight. Chance of precipitation is 30%. Total nighttime snow accumulation of less than a half inch possible.
Monday
Snow likely before 11am, then a chance of flurries between 11am and noon. Mostly cloudy, with a high near 21. Wind chill values as low as -5. South wind 8 to 14 mph, with gusts as high as 22 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Monday Night
Mostly cloudy, with a temperature rising to around 26 by 5am. Wind chill values as low as zero. South wind 9 to 14 mph becoming west after midnight. Winds could gust as high as 23 mph.
Tuesday
A chance of snow after noon, mixing with rain after 3pm. Mostly cloudy, with a high near 39. West wind 8 to 15 mph becoming south in the afternoon. Winds could gust as high as 24 mph. Chance of precipitation is 30%. Little or no snow accumulation expected.
Tuesday Night
A 40 percent chance of rain before midnight. Mostly cloudy, with a low around 18. Windy, with a south southwest wind 21 to 29 mph becoming northwest after midnight. Winds could gust as high as 38 mph. New precipitation amounts of less than a tenth of an inch possible.
Wednesday
Mostly cloudy, with a high near 24. Windy.
Wednesday Night
A 20 percent chance of snow after midnight. Mostly cloudy, with a low around 5.
Thursday
A 40 percent chance of snow. Mostly cloudy, with a high near 16.
Thursday Night
Mostly cloudy, with a low around -4.
Friday
Mostly cloudy and cold, with a high near 6. Blustery.
Friday Night
Mostly cloudy, with a low around -10. Blustery.
Saturday
Mostly cloudy and cold, with a high near 2.
Saturday Night
Mostly cloudy, with a low around -9.
Sunday
Partly sunny and cold, with a high near 10.
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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:
6:17 pm CST Dec 7, 2025
Forecast Valid:
8pm CST Dec 7, 2025-6pm CST Dec 14, 2025
 
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