April weather forecastSister Bay, WI
April
Weather in April
April, like March, in Sister Bay, Wisconsin, is a wintry spring month, with an average temperature varying between 35.1°F (1.7°C) and 41.7°F (5.4°C).Temperature
April comes with a subtle rise, with the average high-temperature adjusting from 34°F (1.1°C) in March to a still icy 41.7°F (5.4°C). April nights reflect a consistent temperature dip to a still cold 35.1°F (1.7°C), a slight descent from daytime peaks.Humidity
In April, the average relative humidity is 79%.Rainfall
In April, the rain falls for 13.8 days. Throughout April, 2.56" (65mm) of precipitation is accumulated. In Sister Bay, Wisconsin, during the entire year, the rain falls for 141.7 days and collects up to 26.93" (684mm) of precipitation.Snowfall
January through May, October through December are months with snowfall. In Sister Bay, during April, snow falls for 4.3 days and regularly aggregates up to 1.1" (28mm) of snow. Throughout the year, there are 62.3 snowfall days, and 15.83" (402mm) of snow is accumulated.Daylight
In Sister Bay, the average length of the day in April is 13h and 32min.On the first day of April, sunrise is at 6:27 am and sunset at 7:16 pm. On the last day of the month, sunrise is at 5:37 am and sunset at 7:53 pm CDT.
Sunshine
In Sister Bay, Wisconsin, the average sunshine in April is 7.8h.UV index
The average daily maximum UV index in April in Sister Bay is 2. A UV Index of 2, and less, symbolizes a minimal health vulnerability from unsafe exposure to UV radiation for ordinary individuals.Note: In April, the UV index of 2 transforms into the following advice:
Extended exposure to the sun should always be avoided by children, infants, and those with sensitive skin. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days. Beware! Reflection from snow can magnify the Sun's UV radiation nearly twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in April
Sister Bay, WI
- Average high temperature in April: 41.7°F
The warmest month (with the highest average high temperature) is August (69.6°F).
The month with the lowest average high temperature is January (25.2°F).
- Average low temperature in April: 35.1°F
The month with the highest average low temperature is August (63°F).
The coldest month (with the lowest average low temperature) is January (18.1°F).
Average pressure in April
Sister Bay, WI
- Average pressure in April: 29.97"Hg
The month with the highest atmospheric pressure is March (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in April
Sister Bay, WI
- Average wind speed in April: 13.2mph
The windiest month (with the highest average wind speed) is December (15.5mph).
The calmest months (with the lowest average wind speed) are June and July (9.6mph).
Average humidity in April
Sister Bay, WI
- Average humidity in April: 79%
The months with the highest relative humidity are January and June (84%).
The month with the lowest relative humidity is November (76%).
Average rainfall in April
Sister Bay, WI
- Average rainfall in April: 2.56"
The wettest month (with the highest rainfall) is October (3.07").
The driest months (with the least rainfall) are January and February (1.38").
Average rainfall days in April
Sister Bay, WI
- Average rainfall days in April: 13.8 days
The month with the highest number of rainy days is August (15.6 days).
The month with the least rainy days is February (4.8 days).
Average snowfall in April
Sister Bay, WI
- Average snowfall in April: 1.1"
The month with the highest snowfall is February (4.49").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in April
Sister Bay, WI
- Average snowfall days in April: 4.3 days
The month with the highest number of snowfall days is January (14.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in April /
Average sunshine in April
Sister Bay, WI
- Average daylight in April: 13h and 30min
The month with the longest days is June (Average daylight: 15h and 36min).
The month with the shortest days is December (Average daylight: 8h and 48min).
- Average sunshine in April: 7h and 48min
The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 3h and 6min).
Average sunshine days in April
Sister Bay, WI
- Average sunshine days in April: 12.3 days
The month with the most sunshine days is September (15.1 days).
The month with the least sunshine days is January (8.3 days).
Average UV index in April
Sister Bay, WI
- Average UV index in April: 2
The months with the highest UV index are July and August (UV index 5).
The months with the lowest UV index are January, March and December (UV index 1).
Average cloud cover in April
Sister Bay, WI
- Average cloud cover in April: 49
The month with the most cloud cover is January (Cloud cover 68).
The months with the least cloud cover are July and August (Cloud cover 28).
Average visibility in April
Sister Bay, WI
- Average visibility in April: 6mi
The months with the highest visibility are March, April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February and December (5mi).
