Sister Bay, WI Weather Forecast
Local 7-day forecast
Light Rain Likely
Track current conditions, temperature changes, wind, and the full daily outlook for Sister Bay, WI in one place.
Rain likely. Mostly cloudy, with a high near 50. Chance of precipitation is 70%.
Local Weather Overview
This forecast page for Sister Bay, WI is designed for quick trip planning, giving you a clean read on daytime highs, overnight lows, and changing conditions across the upcoming forecast window. Latest sync: Apr 13, 2026 8:30 PM CDT.
The active forecast window currently covers Apr 16 to Apr 20, 2026 for Sister Bay, WI.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Apr 16 to Apr 20, 2026
- Latest sync
- Apr 13, 2026 8:30 PM CDT
- Forecast office
- GRB
- Source
- NOAA / NWS
Daily Outlook
This Week in Sister Bay
Friday looks like the warmest upcoming period in Sister Bay at 51 degrees F.
Saturday Night is the coolest period ahead with temperatures near 31 degrees F.
The strongest winds are forecast for Saturday Night at about 16 mph W.
Precipitation is mentioned in 7 upcoming forecast periods.
Forecast Details
- Last updated
- Apr 13, 2026 8:30 PM CDT
- Coverage
- 5 days
- Time zone
- America/Chicago
- Forecast office
- GRB
- Radar station
- KGRB
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
A chance of rain before 1am. Mostly cloudy, with a low around 38. Chance of precipitation is 40%.
A slight chance of rain after 1pm. Partly sunny, with a high near 51. Chance of precipitation is 20%.
A slight chance of rain before 7pm, then rain and a slight chance of thunderstorms. Mostly cloudy, with a low around 43. Chance of precipitation is 90%.
Rain before 7am, then rain likely and a slight chance of thunderstorms. Mostly cloudy, with a high near 47. Chance of precipitation is 90%.
A chance of rain before 10pm, then a chance of rain and snow. Mostly cloudy, with a low around 31. Chance of precipitation is 40%.
A slight chance of snow before 7am. Partly sunny, with a high near 40. Chance of precipitation is 20%.
Partly cloudy, with a low around 31.
Mostly sunny, with a high near 44.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Thursday
Apr 16
|
Light Rain Likely
|
50°F |
7 mph
NNE
|
|
Thursday Night
Apr 16
|
Chance Light Rain
|
38°F |
6 mph
NE
|
|
Friday
Apr 17
|
Partly Sunny then Slight Chance Light Rain
|
51°F |
6 to 10 mph
ESE
|
|
Friday Night
Apr 17
|
Light Rain
|
43°F |
14 mph
SSE
|
|
Saturday
Apr 18
|
Light Rain Likely
|
47°F |
15 mph
SW
|
|
Saturday Night
Apr 18
|
Chance Rain And Snow
|
31°F |
16 mph
W
|
|
Sunday
Apr 19
|
Slight Chance Light Snow then Partly Sunny
|
40°F |
12 to 16 mph
WNW
|
|
Sunday Night
Apr 19
|
Partly Cloudy
|
31°F |
8 to 12 mph
WNW
|
|
Monday
Apr 20
|
Mostly Sunny
|
44°F |
10 mph
SW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Sister Bay.
