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
|
Fair, 37°F | Humidity: 48% | Dewpoint: 19°F |
| Wind Speed: SE 10.4 MPH (9 KT) | Heat Index: 37°F | ||
| Barometer: 30.01 in. | Wind Chill: 30°F |
Weather Forecast
 | Hi: 40°F | This afternoon: Mostly sunny. Highs near 40 along the lake to the middle 40s inland. East wind 10 to 15 mph. |
| Lo: 31°F | ||
 | Hi: 46°F | Tuesday: Mostly sunny in the morning then becoming partly cloudy. Highs 42 to 48. East wind 5 to 10 mph in the morning becoming light and variable. |
| Lo: 31°F | ||
| Hi: 45°F | Wednesday: Partly cloudy. Highs in the middle 40s. Northwest wind 10 to 15 mph. |
| Lo: 29°F | ||
| Hi: 41°F | Thursday: Partly cloudy. Highs in the lower 40s. |
| Lo: 21°F | ||
| Hi: 39°F | Friday: Mostly sunny in the morning then becoming partly cloudy. Highs in the upper 30s. |
| Lo: 25°F | ||
 | Hi: 40°F | Saturday: Partly sunny. Highs around 40. |
| Lo: 30°F |
Moon, Sunrise and Sunset
 |
Moon Phase: Waxing Gibbous Moon | Civil Twilight: 6:17 AM CDT |
Sunrise: 6:47 AM CDT |
| Sunset: 7:03 PM CDT |
Civil Twilight: 7:33 PM CDT |
Normal Climate
Normal Temperatures
| 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
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Inch | 1.58 | 0.84 | 1.67 | 2.26 | 2.65 | 3.20 | 3.06 | 3.27 | 3.34 | 2.79 | 2.43 | 1.45 | 28.54 |
