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.

Partly Cloudy

59°F

15°C

Humidity 81%
Wind Speed Calm
Barometer 30.08 in
Dewpoint 53°F (12°C)
Visibility 10.00 mi
Last update 27 Aug 11:55 pm CDT
Extended Forecast for

Sister Bay WI

  • Overnight

    Overnight: Mostly cloudy, with a steady temperature around 60. East southeast wind 3 to 5 mph.

    Low: 60 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 73. Calm wind becoming southeast 5 to 7 mph in the morning.

    High: 73 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Patchy fog after 5am. Otherwise, partly cloudy, with a low around 62. South southeast wind around 7 mph.

    Low: 62 °F

    Partly Cloudy
    then Patchy
    Fog

  • Saturday

    Saturday: A 30 percent chance of showers after 1pm. Patchy fog before 8am. Otherwise, increasing clouds, with a high near 77. Southwest wind 7 to 10 mph.

    High: 77 °F

    Patchy Fog
    then Chance
    Showers

  • Saturday Night

    Saturday Night: A chance of showers, with thunderstorms also possible after 4am. Cloudy, with a low around 64. South southwest wind 7 to 10 mph. Chance of precipitation is 50%.

    Low: 64 °F

    Slight Chance
    Showers then
    Chance
    Showers

  • Sunday

    Sunday: Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 77. Chance of precipitation is 60%.

    High: 77 °F

    Showers
    Likely

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 64. Chance of precipitation is 40%.

    Low: 64 °F

    Chance
    Showers

  • Monday

    Monday: A 20 percent chance of showers before 1pm. Partly sunny, with a high near 81.

    High: 81 °F

    Slight Chance
    Showers

  • Monday Night

    Monday Night: A slight chance of showers and thunderstorms, then a chance of showers after 1am. Mostly cloudy, with a low around 66. Chance of precipitation is 30%.

    Low: 66 °F

    Slight Chance
    T-storms then
    Chance
    Showers

Detailed Forecast

Overnight
Mostly cloudy, with a steady temperature around 60. East southeast wind 3 to 5 mph.
Friday
Mostly sunny, with a high near 73. Calm wind becoming southeast 5 to 7 mph in the morning.
Friday Night
Patchy fog after 5am. Otherwise, partly cloudy, with a low around 62. South southeast wind around 7 mph.
Saturday
A 30 percent chance of showers after 1pm. Patchy fog before 8am. Otherwise, increasing clouds, with a high near 77. Southwest wind 7 to 10 mph.
Saturday Night
A chance of showers, with thunderstorms also possible after 4am. Cloudy, with a low around 64. South southwest wind 7 to 10 mph. Chance of precipitation is 50%.
Sunday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 77. Chance of precipitation is 60%.
Sunday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 64. Chance of precipitation is 40%.
Monday
A 20 percent chance of showers before 1pm. Partly sunny, with a high near 81.
Monday Night
A slight chance of showers and thunderstorms, then a chance of showers after 1am. Mostly cloudy, with a low around 66. Chance of precipitation is 30%.
Tuesday
Mostly sunny, with a high near 82.
Tuesday Night
A 20 percent chance of showers. Mostly cloudy, with a low around 64.
Wednesday
A 20 percent chance of showers. Mostly sunny, with a high near 80.
Wednesday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 63.
Thursday
Mostly sunny, with a high near 79.
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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:
9:52 pm CDT Aug 27, 2026
Forecast Valid:
12am CDT Aug 28, 2026-6pm CDT Sep 3, 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