Sister Bay, WI Weather

Sister Bay, WI climate is mild during summer when temperatures tend to be in the 60's and extremely cold during winter when temperatures tend to be in the 10's.

The warmest month of the year is July with an average maximum temperature of 73.80 degrees Fahrenheit, while the coldest month of the year is January with an average minimum temperature of 9.20 degrees Fahrenheit.

Temperature variations between night and day tend to be fairly limited during summer with a difference that can reach 15 degrees Fahrenheit, and fairly limited during winter with an average difference of 15 degrees Fahrenheit.

The annual average precipitation at Sister Bay is 28.54 Inches. Rainfall in is fairly evenly distributed throughout the year. The wettest month of the year is September with an average rainfall of 3.34 Inches.

Weather Data

Current Conditions

(Updated: 8:15 PM CST SUN NOV 22 2009)

Fog And Mist, 46°F	Humidity: 93%	Dewpoint: 45°F
	Wind Speed: SE 10.4 MPH (9 KT)	Heat Index: 46°F
	Barometer: 30.12 in.	Wind Chill: 41°F

Weather Forecast

(Generated: 3:31 PM CST SUN NOV 22 2009)

		Tonight: Partly cloudy. Areas of dense fog reducing visibilities to less than 1/4 mile at Times after midnight. Lows 40 to 43. South wind 10 to 15 mph.
	Lo: 42°F
	Hi: 51°F	Monday: Partly sunny. Areas of fog in the morning. Highs 48 to 53. Southeast wind 5 to 10 mph.
	Lo: 38°F
	Hi: 49°F	Tuesday: Mostly cloudy. Patchy fog in the morning. Highs in the upper 40s. East wind 10 to 15 mph.
	Lo: 40°F
	Hi: 45°F	Wednesday: Light rain likely. Highs in the middle 40s. Chance of rain 60 percent.
	Lo: 35°F
	Hi: 40°F	Thanksgiving day: Cloudy with a chance of snow showers. Blustery. Highs around 40. Chance of snow 50 percent.
	Lo: 31°F
	Hi: 41°F	Friday: Partly cloudy and blustery. Highs in the lower 40s.
	Lo: 30°F
	Hi: 41°F	Saturday: Partly cloudy. Highs in the lower 40s.
	Lo: 31°F

Moon, Sunrise and Sunset

	Moon Phase: Waxing Crescent Moon	Civil Twilight: 6:22 AM CST	Sunrise: 6:55 AM CST
		Sunset: 4:13 PM CST	Civil Twilight: 4:45 PM CST

Normal Climate

Normal Temperatures

(WASHINGTON ISLAND Weather station, 15.68 miles from Sister Bay)

Month	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Annual
Max °F	23.6	26.1	35.4	46.4	58.9	67.7	73.8	72.5	64.7	53.3	40.6	29.1	49.3
Mean °F	16.4	18.0	27.7	38.6	50.0	59.4	66.1	65.3	58.1	47.0	35.1	23.7	42.1
Min °F	9.2	9.8	19.9	30.7	41.0	51.0	58.3	58.0	51.4	40.7	29.5	18.3	34.8

Normal Precipitation