Sister Bay Weather Forecast
- 58
- 79
Slight Chance Thunderstorms
- 55
- 69
Partly Sunny
- 56
- 65
Partly Sunny
- 58
- 67
Chance Thunderstorms
- 59
- 69
Chance Rain Showers
- 56
- 71
Chance Rain Showers
Today 17 Sep Door
Mostly sunny. Highs in the lower 80s. Southwest wind 5 to 10 Mph.
Tonight 17 Sep Door
Mostly clear. Nearly steady temperature in the lower 60s. South wind 5 to 10 Mph.
Sister Bay Temperature Statistics
September Temperature
Ephraim-Gibraltar Airport (4.3 miles)
Lowest 8 September, 2025
44.1 °FAverage September
59.3 °FHighest 14 September, 2025
76.5 °F
Climate (2020–Present)
Ephraim-Gibraltar Airport (4.3 miles)
Average Low 2020–2025
38.9 °FAverage 2020–2025
45.6 °FAverage High 2020–2025
52.7 °F