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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

Duluth International Airport (KDLH)

Lat: 46.84°NLon: 92.19°WElev: 1427ft.

Partly Cloudy and Breezy

60°F

16°C

Humidity 80%
Wind Speed E 23 G 32 mph
Barometer 30.12 in (1020.3 mb)
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Last update 17 Aug 5:55 pm CDT
Extended Forecast for

Hermantown MN

  • Tonight

    Tonight: Showers and thunderstorms likely, then showers and possibly a thunderstorm after 1am. Patchy fog after midnight. Low around 56. Breezy, with an east wind around 15 mph, with gusts as high as 30 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 56 °F

    Chance
    T-storms and
    Breezy then
    Showers and
    Patchy Fog

  • Monday

    Monday: Showers and thunderstorms likely, mainly before 1pm. Patchy fog between 8am and noon. Otherwise, cloudy, with a high near 72. East wind around 10 mph, with gusts as high as 15 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 72 °F

    Showers
    Likely and
    Patchy Fog
    then Chance
    Showers

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 58. North wind around 5 mph.

    Low: 58 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 75. North wind 5 to 10 mph.

    High: 75 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 56. Northeast wind around 5 mph becoming calm in the evening.

    Low: 56 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 78. Calm wind becoming east around 5 mph in the afternoon.

    High: 78 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 57. East wind around 5 mph becoming calm in the evening.

    Low: 57 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 81. South wind 5 to 10 mph, with gusts as high as 15 mph.

    High: 81 °F

    Sunny

  • Thursday Night

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

    Low: 62 °F

    Slight Chance
    T-storms then
    Chance
    Showers

Detailed Forecast

Tonight
Showers and thunderstorms likely, then showers and possibly a thunderstorm after 1am. Patchy fog after midnight. Low around 56. Breezy, with an east wind around 15 mph, with gusts as high as 30 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Monday
Showers and thunderstorms likely, mainly before 1pm. Patchy fog between 8am and noon. Otherwise, cloudy, with a high near 72. East wind around 10 mph, with gusts as high as 15 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Monday Night
Mostly cloudy, with a low around 58. North wind around 5 mph.
Tuesday
Partly sunny, with a high near 75. North wind 5 to 10 mph.
Tuesday Night
Mostly clear, with a low around 56. Northeast wind around 5 mph becoming calm in the evening.
Wednesday
Sunny, with a high near 78. Calm wind becoming east around 5 mph in the afternoon.
Wednesday Night
Mostly clear, with a low around 57. East wind around 5 mph becoming calm in the evening.
Thursday
Sunny, with a high near 81. South wind 5 to 10 mph, with gusts as high as 15 mph.
Thursday Night
A chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 62. Southwest wind around 5 mph.
Friday
A slight chance of showers, with thunderstorms also possible after 1pm. Mostly sunny, with a high near 78. West wind 5 to 10 mph, with gusts as high as 20 mph.
Friday Night
Mostly clear, with a low around 55. West wind 5 to 10 mph, with gusts as high as 15 mph.
Saturday
Mostly sunny, with a high near 69. Breezy, with a northwest wind 10 to 15 mph, with gusts as high as 20 mph.
Saturday Night
Partly cloudy, with a low around 50. Northwest wind 5 to 10 mph, with gusts as high as 15 mph.
Sunday
Mostly sunny, with a high near 68. Northwest wind around 10 mph, with gusts as high as 15 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Hermantown MN
 46.81°N 92.23°W
Last Update:
4:26 pm CDT Aug 17, 2025
Forecast Valid:
6pm CDT Aug 17, 2025-6pm CDT Aug 24, 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