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

62°F

17°C

Humidity 72%
Wind Speed E 5 mph
Barometer 30.10 in
Dewpoint 52°F (11°C)
Visibility 10.00 mi
Last update 27 Jun 6:55 am CDT
Extended Forecast for

Sister Bay WI

  • Today

    Today: Sunny, with a high near 79. East northeast wind 3 to 6 mph.

    High: 79 °F

    Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 61. Light and variable wind becoming east around 5 mph after midnight.

    Low: 61 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 81. Southeast wind 6 to 8 mph.

    High: 81 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: A chance of showers before 10pm, then a chance of showers and thunderstorms between 10pm and 1am, then showers and possibly a thunderstorm after 1am. Low around 63. Southeast wind 6 to 14 mph, with gusts as high as 22 mph. Chance of precipitation is 80%.

    Low: 63 °F

    Chance
    Showers then
    Showers

  • Monday

    Monday: A 20 percent chance of showers and thunderstorms before 1pm. Mostly cloudy, then gradually becoming sunny, with a high near 83. South wind around 15 mph, with gusts as high as 24 mph.

    High: 83 °F

    Slight Chance
    T-storms

  • Monday Night

    Monday Night: Partly cloudy, with a low around 67.

    Low: 67 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny and hot, with a high near 90.

    High: 90 °F

    Hot

  • Tuesday Night

    Tuesday Night: A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 68.

    Low: 68 °F

    Chance
    T-storms

  • Wednesday

    Wednesday: A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 88.

    High: 88 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

Detailed Forecast

Today
Sunny, with a high near 79. East northeast wind 3 to 6 mph.
Tonight
Partly cloudy, with a low around 61. Light and variable wind becoming east around 5 mph after midnight.
Sunday
Mostly sunny, with a high near 81. Southeast wind 6 to 8 mph.
Sunday Night
A chance of showers before 10pm, then a chance of showers and thunderstorms between 10pm and 1am, then showers and possibly a thunderstorm after 1am. Low around 63. Southeast wind 6 to 14 mph, with gusts as high as 22 mph. Chance of precipitation is 80%.
Monday
A 20 percent chance of showers and thunderstorms before 1pm. Mostly cloudy, then gradually becoming sunny, with a high near 83. South wind around 15 mph, with gusts as high as 24 mph.
Monday Night
Partly cloudy, with a low around 67.
Tuesday
Mostly sunny and hot, with a high near 90.
Tuesday Night
A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 68.
Wednesday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 88.
Wednesday Night
A 50 percent chance of showers and thunderstorms. Partly cloudy, with a low around 68.
Thursday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 88.
Thursday Night
A 50 percent chance of showers and thunderstorms. Partly cloudy, with a low around 67.
Friday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 86.
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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:
7:06 am CDT Jun 27, 2026
Forecast Valid:
7am CDT Jun 27, 2026-6pm CDT Jul 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