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Watching Hurricane Erin; Heavy Rainfall Threat for Upper Midwest; Heatrisk for Mississippi Valley

Hurricane Erin continues to track westward with its outer bands bringing heavy rainfall and gusty winds for Puerto Rico and US Virgin Islands. Life-threatening surf and rip currents are occurring and will spread across the Atlantic coasts this week. Meanwhile, heavy rainfall and possible flooding are in the forecast for upper Midwest through Monday. Heatrisk continues for the Mississippi Valley. Read More >

Hazardous Weather Conditions

Current conditions at

Grand Marais, The Bay of Grand Marais (KGNA)

Lat: 47.75°NLon: 90.34°WElev: 610ft.

61°F

16°C

Humidity 70%
Wind Speed E 18 mph
Barometer 30.23 in (1023.5 mb)
Dewpoint 51°F (11°C)
Visibility NA
Last update 17 Aug 2:56 pm CDT
Extended Forecast for

Grand Marais MN

  • Tonight

    Tonight: Showers likely, mainly after 5am. Increasing clouds, with a low around 54. Breezy, with an east wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 54 °F

    Breezy.
    Mostly Cloudy
    then Showers
    Likely

  • Monday

    Monday: Showers and possibly a thunderstorm, mainly before 2pm, then a chance of showers and thunderstorms after 2pm. Patchy fog between noon and 1pm. High near 67. Breezy, with an east wind 5 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    High: 67 °F

    Showers and
    Patchy Fog

  • Monday Night

    Monday Night: A 30 percent chance of showers, mainly before 8pm. Mostly cloudy, with a low around 58. North wind 5 to 10 mph, with gusts as high as 15 mph.

    Low: 58 °F

    Chance
    Showers then
    Mostly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 71. North wind 5 to 10 mph, with gusts as high as 15 mph.

    High: 71 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 57. Calm wind becoming north around 5 mph.

    Low: 57 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 74. Calm wind becoming south around 5 mph.

    High: 74 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 59. Calm wind.

    Low: 59 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 75. Calm wind becoming south around 5 mph in the afternoon.

    High: 75 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 62. West wind around 5 mph, with gusts as high as 15 mph.

    Low: 62 °F

    Slight Chance
    T-storms then
    Chance
    Showers

Detailed Forecast

Tonight
Showers likely, mainly after 5am. Increasing clouds, with a low around 54. Breezy, with an east wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Monday
Showers and possibly a thunderstorm, mainly before 2pm, then a chance of showers and thunderstorms after 2pm. Patchy fog between noon and 1pm. High near 67. Breezy, with an east wind 5 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Monday Night
A 30 percent chance of showers, mainly before 8pm. Mostly cloudy, with a low around 58. North wind 5 to 10 mph, with gusts as high as 15 mph.
Tuesday
Partly sunny, with a high near 71. North wind 5 to 10 mph, with gusts as high as 15 mph.
Tuesday Night
Mostly clear, with a low around 57. Calm wind becoming north around 5 mph.
Wednesday
Sunny, with a high near 74. Calm wind becoming south around 5 mph.
Wednesday Night
Mostly clear, with a low around 59. Calm wind.
Thursday
Mostly sunny, with a high near 75. Calm wind becoming south around 5 mph in the afternoon.
Thursday Night
A chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 62. West wind around 5 mph, with gusts as high as 15 mph.
Friday
A slight chance of showers. Mostly sunny, with a high near 75. West wind around 10 mph, with gusts as high as 15 mph.
Friday Night
Partly cloudy, with a low around 57. West wind 5 to 10 mph, with gusts as high as 20 mph.
Saturday
A slight chance of showers. Mostly sunny, with a high near 67. West wind around 10 mph, with gusts as high as 20 mph.
Saturday Night
Partly cloudy, with a low around 52. Northwest wind around 10 mph, with gusts as high as 20 mph.
Sunday
Mostly sunny, with a high near 68. Northwest wind 5 to 10 mph, with gusts as high as 20 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Grand Marais MN
 47.77°N 90.36°W
Last Update:
2:40 pm CDT Aug 17, 2025
Forecast Valid:
3pm CDT Aug 17, 2025-6pm CDT Aug 24, 2025
 
Forecast Discussion
 
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Additional Resources

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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