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Areas of Excessive Rainfall and Extreme Heat; Monitoring Tropical Storm Erin

Heavy to excessive rainfall over the southern Appalachians may bring areas of flooding Tuesday. Hot to extremely hot temperatures are in place through Tuesday across much of the western U.S. and northern New England. Tropical Storm Erin is forecast to become a Major Hurricane by this weekend as it moves across the central Atlantic Ocean. Monitor future forecasts for any East Coast impacts. Read More >

Hazardous Weather Conditions

Current conditions at

Grand Marais, The Bay of Grand Marais (KGNA)

Lat: 47.75°NLon: 90.34°WElev: 610ft.

66°F

19°C

Humidity 87%
Wind Speed W 3 mph
Barometer 29.83 in (1009.5 mb)
Dewpoint 62°F (17°C)
Visibility NA
Last update 11 Aug 11:56 pm CDT
Extended Forecast for

Grand Marais MN

  • Overnight

    Overnight: A chance of showers, with thunderstorms also possible after 4am. Areas of smoke between 3am and 4am. Mostly cloudy, with a low around 63. Southwest wind around 5 mph. Chance of precipitation is 30%.

    Low: 63 °F

    Chance
    Showers

  • Tuesday

    Tuesday: A chance of showers before 1pm, then a slight chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 75. West wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 30%.

    High: 75 °F

    Chance
    Showers

  • Tuesday Night

    Tuesday Night: Patchy smoke before 10pm. Partly cloudy, with a low around 57. West wind around 5 mph, with gusts as high as 15 mph.

    Low: 57 °F

    Patchy Smoke
    then Mostly
    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 71. Northwest wind around 5 mph becoming southwest in the afternoon.

    High: 71 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 55. Calm wind becoming east around 5 mph after midnight.

    Low: 55 °F

    Partly Cloudy

  • Thursday

    Thursday: A 20 percent chance of showers after 1pm. Partly sunny, with a high near 69. East wind 5 to 10 mph, with gusts as high as 15 mph.

    High: 69 °F

    Mostly Sunny
    then Slight
    Chance
    Showers

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 61. East wind around 5 mph becoming south after midnight. Winds could gust as high as 15 mph.

    Low: 61 °F

    Chance
    Showers

  • Friday

    Friday: A chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 79. Southwest wind around 5 mph, with gusts as high as 15 mph.

    High: 79 °F

    Chance
    Showers

  • Friday Night

    Friday Night: A chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 61. Northwest wind around 5 mph.

    Low: 61 °F

    Slight Chance
    T-storms then
    Chance
    Showers

Detailed Forecast

Overnight
A chance of showers, with thunderstorms also possible after 4am. Areas of smoke between 3am and 4am. Mostly cloudy, with a low around 63. Southwest wind around 5 mph. Chance of precipitation is 30%.
Tuesday
A chance of showers before 1pm, then a slight chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 75. West wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 30%.
Tuesday Night
Patchy smoke before 10pm. Partly cloudy, with a low around 57. West wind around 5 mph, with gusts as high as 15 mph.
Wednesday
Sunny, with a high near 71. Northwest wind around 5 mph becoming southwest in the afternoon.
Wednesday Night
Partly cloudy, with a low around 55. Calm wind becoming east around 5 mph after midnight.
Thursday
A 20 percent chance of showers after 1pm. Partly sunny, with a high near 69. East wind 5 to 10 mph, with gusts as high as 15 mph.
Thursday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 61. East wind around 5 mph becoming south after midnight. Winds could gust as high as 15 mph.
Friday
A chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 79. Southwest wind around 5 mph, with gusts as high as 15 mph.
Friday Night
A chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 61. Northwest wind around 5 mph.
Saturday
A chance of showers, with thunderstorms also possible after 1pm. Mostly sunny, with a high near 75. North wind around 5 mph becoming southwest in the afternoon.
Saturday Night
A slight chance of showers. Partly cloudy, with a low around 57. North wind around 5 mph, with gusts as high as 15 mph.
Sunday
A slight chance of showers. Mostly sunny, with a high near 71. East wind around 5 mph, with gusts as high as 15 mph.
Sunday Night
A slight chance of showers. Partly cloudy, with a low around 56. Northeast wind around 5 mph.
Monday
A slight chance of showers. Mostly sunny, with a high near 69. East wind around 5 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Grand Marais MN
 47.76°N 90.33°W
Last Update:
9:26 pm CDT Aug 11, 2025
Forecast Valid:
12am CDT Aug 12, 2025-6pm CDT Aug 18, 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