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.

Overcast

59°F

15°C

Humidity 90%
Wind Speed W 13 mph
Barometer 29.65 in (1002.9 mb)
Dewpoint 56°F (13°C)
Visibility 10.00 mi
Last update 18 Jun 3:53 am CDT
Extended Forecast for

Grafton IA

  • Today

    Today: Mostly sunny, with a high near 71. Northwest wind 11 to 13 mph, with gusts as high as 22 mph.

    High: 71 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 50. Northwest wind 5 to 10 mph becoming light after midnight. Winds could gust as high as 18 mph.

    Low: 50 °F

    Mostly Clear

  • Juneteenth

    Juneteenth: A slight chance of showers and thunderstorms between 1pm and 4pm. Increasing clouds, with a high near 75. Light west wind becoming west southwest 8 to 13 mph in the morning. Winds could gust as high as 23 mph. Chance of precipitation is 20%.

    High: 75 °F

    Sunny then
    Slight Chance
    T-storms

  • Friday Night

    Friday Night: A slight chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 1am. Partly cloudy, with a low around 55. West northwest wind 6 to 13 mph, with gusts as high as 22 mph. Chance of precipitation is 20%.

    Low: 55 °F

    Slight Chance
    T-storms then
    Slight Chance
    Showers

  • Saturday

    Saturday: Sunny, with a high near 78. North northwest wind around 7 mph.

    High: 78 °F

    Sunny

  • Saturday Night

    Saturday Night: A 40 percent chance of showers after 1am. Mostly cloudy, with a low around 56. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 56 °F

    Mostly Cloudy
    then Chance
    Showers

  • Sunday

    Sunday: A 50 percent chance of showers. Partly sunny, with a high near 72.

    High: 72 °F

    Chance
    Showers

  • Sunday Night

    Sunday Night: A 20 percent chance of showers before 1am. Mostly cloudy, with a low around 52.

    Low: 52 °F

    Slight Chance
    Showers

  • Monday

    Monday: Mostly sunny, with a high near 75.

    High: 75 °F

    Mostly Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 71. Northwest wind 11 to 13 mph, with gusts as high as 22 mph.
Tonight
Mostly clear, with a low around 50. Northwest wind 5 to 10 mph becoming light after midnight. Winds could gust as high as 18 mph.
Juneteenth
A slight chance of showers and thunderstorms between 1pm and 4pm. Increasing clouds, with a high near 75. Light west wind becoming west southwest 8 to 13 mph in the morning. Winds could gust as high as 23 mph. Chance of precipitation is 20%.
Friday Night
A slight chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 1am. Partly cloudy, with a low around 55. West northwest wind 6 to 13 mph, with gusts as high as 22 mph. Chance of precipitation is 20%.
Saturday
Sunny, with a high near 78. North northwest wind around 7 mph.
Saturday Night
A 40 percent chance of showers after 1am. Mostly cloudy, with a low around 56. New precipitation amounts between a tenth and quarter of an inch possible.
Sunday
A 50 percent chance of showers. Partly sunny, with a high near 72.
Sunday Night
A 20 percent chance of showers before 1am. Mostly cloudy, with a low around 52.
Monday
Mostly sunny, with a high near 75.
Monday Night
Partly cloudy, with a low around 54.
Tuesday
Mostly sunny, with a high near 76.
Tuesday Night
A 40 percent chance of showers. Partly cloudy, with a low around 57.
Wednesday
Mostly sunny, with a high near 79.
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ABOUT THIS FORECAST

 
Point Forecast:
Grafton IA
 43.32°N 93.07°W
Last Update:
1:32 am CDT Jun 18, 2026
Forecast Valid:
4am CDT Jun 18, 2026-6pm CDT Jun 24, 2026
 
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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