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

Hazardous Weather Conditions

Current conditions at

Ephraim-Gibraltar Airport (K3D2)

Lat: 45.14°NLon: 87.19°WElev: 773ft.

Overcast

61°F

16°C

Humidity 78%
Wind Speed E 6 mph
Barometer 30.37 in
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Last update 18 Sep 9:35 am CDT
Extended Forecast for

Sister Bay WI

  • Today

    Today: A 40 percent chance of showers, mainly after 3pm. Mostly cloudy, with a high near 64. East northeast wind around 8 mph.

    High: 64 °F

    Mostly Cloudy
    then Chance
    Showers

  • Tonight

    Tonight: Showers likely, mainly before 8pm. Mostly cloudy, with a low around 53. East wind around 7 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 53 °F

    Showers
    Likely then
    Chance
    Showers

  • Saturday

    Saturday: A chance of showers before 1pm, then a slight chance of showers after 3pm. Cloudy, with a high near 63. East southeast wind 7 to 9 mph. Chance of precipitation is 30%.

    High: 63 °F

    Chance
    Showers

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 51. East northeast wind 6 to 8 mph.

    Low: 51 °F

    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 66. Northeast wind 11 to 14 mph, with gusts as high as 20 mph.

    High: 66 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 50.

    Low: 50 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly cloudy, with a high near 61.

    High: 61 °F

    Mostly Cloudy

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 48.

    Low: 48 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 62.

    High: 62 °F

    Mostly Sunny

Detailed Forecast

Today
A 40 percent chance of showers, mainly after 3pm. Mostly cloudy, with a high near 64. East northeast wind around 8 mph.
Tonight
Showers likely, mainly before 8pm. Mostly cloudy, with a low around 53. East wind around 7 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Saturday
A chance of showers before 1pm, then a slight chance of showers after 3pm. Cloudy, with a high near 63. East southeast wind 7 to 9 mph. Chance of precipitation is 30%.
Saturday Night
Mostly cloudy, with a low around 51. East northeast wind 6 to 8 mph.
Sunday
Partly sunny, with a high near 66. Northeast wind 11 to 14 mph, with gusts as high as 20 mph.
Sunday Night
Mostly cloudy, with a low around 50.
Monday
Mostly cloudy, with a high near 61.
Monday Night
Mostly cloudy, with a low around 48.
Tuesday
Mostly sunny, with a high near 62.
Tuesday Night
Partly cloudy, with a low around 48.
Wednesday
Mostly sunny, with a high near 64.
Wednesday Night
Mostly cloudy, with a low around 49.
Thursday
Partly sunny, with a high near 66.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Sister Bay WI
 45.19°N 87.12°W (Elev. 630 ft)
Last Update:
8:37 am CDT Sep 18, 2026
Forecast Valid:
9am CDT Sep 18, 2026-6pm CDT Sep 24, 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