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

Ephraim-Gibraltar Airport (K3D2)

Lat: 45.14°NLon: 87.19°WElev: 773ft.

Fair

17°F

-8°C

Humidity 55%
Wind Speed Calm
Barometer 30.48 in
Dewpoint 4°F (-16°C)
Visibility 10.00 mi
Last update 1 Mar 5:55 pm CST
Extended Forecast for

Sister Bay WI

  • Tonight

    Tonight: Mostly clear, with a low around 12. Calm wind becoming south around 6 mph after midnight.

    Low: 12 °F

    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 34. South southwest wind 7 to 16 mph, with gusts as high as 24 mph.

    High: 34 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Increasing clouds, with a steady temperature around 29. South southwest wind 6 to 11 mph becoming light southwest after midnight.

    Low: 29 °F

    Increasing
    Clouds

  • Tuesday

    Tuesday: Cloudy, then gradually becoming mostly sunny, with a high near 36. Calm wind becoming south around 5 mph.

    High: 36 °F

    Decreasing
    Clouds

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 25. Calm wind.

    Low: 25 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 36.

    High: 36 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: A 20 percent chance of rain. Mostly cloudy, with a low around 29.

    Low: 29 °F

    Slight Chance
    Rain

  • Thursday

    Thursday: A 30 percent chance of rain. Mostly cloudy, with a high near 38.

    High: 38 °F

    Chance Rain

  • Thursday Night

    Thursday Night: A 20 percent chance of rain. Cloudy, with a low around 32.

    Low: 32 °F

    Slight Chance
    Rain

Detailed Forecast

Tonight
Mostly clear, with a low around 12. Calm wind becoming south around 6 mph after midnight.
Monday
Mostly sunny, with a high near 34. South southwest wind 7 to 16 mph, with gusts as high as 24 mph.
Monday Night
Increasing clouds, with a steady temperature around 29. South southwest wind 6 to 11 mph becoming light southwest after midnight.
Tuesday
Cloudy, then gradually becoming mostly sunny, with a high near 36. Calm wind becoming south around 5 mph.
Tuesday Night
Partly cloudy, with a low around 25. Calm wind.
Wednesday
Mostly sunny, with a high near 36.
Wednesday Night
A 20 percent chance of rain. Mostly cloudy, with a low around 29.
Thursday
A 30 percent chance of rain. Mostly cloudy, with a high near 38.
Thursday Night
A 20 percent chance of rain. Cloudy, with a low around 32.
Friday
Rain likely, mainly after noon. Mostly cloudy, with a high near 44. Chance of precipitation is 60%.
Friday Night
Rain likely. Mostly cloudy, with a low around 31. Chance of precipitation is 60%.
Saturday
Partly sunny, with a high near 42.
Saturday Night
Partly cloudy, with a low around 31.
Sunday
Mostly sunny, with a high near 45.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Sister Bay WI
 45.19°N 87.12°W (Elev. 630 ft)
Last Update:
1:32 pm CST Mar 1, 2026
Forecast Valid:
6pm CST Mar 1, 2026-6pm CDT Mar 8, 2026
 
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