TODAY OCT20
TEMPERATURE34
HUMIDITY61
PRESSURE30.03
WIND COND.350 23
  • 4437Sun
  • 5239Mon
  • 4534Tue
  • 4336Wed
  • 4738Thu
daynightWeather update from Ephraim-Gibraltar Airport at
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Sister Bay Average Temperature

In the event that the weather data was unavailable for this city, estimates based upon nearby cities were used.
MonthTemp. (min)Temp. (max)Temp. (avg)Precipitation
January12°F27°F19°F2.7"
February12°F29°F20°F0.9"
March22°F40°F31°F2.4"
April33°F52°F42°F3.5"
May44°F65°F54°F5.4"
June54°F74°F64°F5.5"
July59°F80°F69°F5.5"
August58°F77°F67°F5.6"
September51°F70°F60°F5.4"
October40°F57°F49°F5.0"
November30°F45°F37°F5.4"
December17°F31°F24°F2.4"

Did you know?

  • The highest monthly average temperature in Sister Bay for July is 69 degrees.
  • The lowest monthly average temperature in Sister Bay for January is 19 degrees.
  • The most monthly precipitation in Sister Bay occurs in August with 5.6 inches.
  • The air quality index in Sister Bay is 19% better than the national average.
  • The pollution index in Sister Bay is 57% better than the national average.

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Sister Bay air quality index & pollution index

In the event that the air quality/pollution data was unavailable for this city, estimates based upon nearby cities were used.
IndexSister BayWisconsinNational
Air quality index406950
Pollution index2,162,1503,316,8775,066,862

Sister Bay air quality information

MeasurementTotal
Days measured365
Days with good air quality263
Days with moderate air quality97
Days w/ poor A.Q. for sensitive groups5
Days with unhealthy air quality

Sister Bay air quality information

PollutantTotal
Arsenic0.002%
Benzene0.030%
Carbon Tetrachloride0.001%
Lead0.001%
Mercury0.002%

Average monthly Sister Bay temperature with heat index

Sister Bay monthly precipitation with daily maximum

Sister Bay monthly snow depth with daily maximum

Sister Bay monthly wind speed information

Nearby cities with good air quality

City, StatePopulationAir Quality IndexNational Avg.
Baileys Harbor, WI2314020%
Egg Harbor, WI2674020%
Ellison Bay, WI2304020%
Ephraim, WI2664020%
Sister Bay, WI7104020%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
Strattanville, PA7103334%
Cascade, MT7102648%
Napoleonville, LA7103432%
Brownstown, IL7103726%
Loon Lake, WA7103922%
Sister Bay, WI7104020%
Source: The Sister Bay, WI weather data displayed above is derived from the NOAA (National Oceanic and Atmospheric). Air quality and pollution data is derived from the EPA (United States Environmental Protection Agency). Air quality and pollution levels measured in a particular area may not be representative of the entire county.