April weather forecast
Green Bay, WI

The sun setting over Green Bay in Wisconsin
The sun setting over Green Bay in Wisconsin

Weather in April

April in Green Bay, Wisconsin, is a fresh spring month, with temperature in the range of an average low of 35.2°F (1.8°C) and an average high of 50.2°F (10.1°C).

Temperature

In April, the average high-temperature increases from a cold 38.5°F (3.6°C) in March to a fresh 50.2°F (10.1°C). The average low-temperature, in April, is 35.2°F (1.8°C).

Humidity

The months with the lowest humidity are April and May, with an average relative humidity of 76%.

Rainfall

In Green Bay, during 14 rainfall days, 2.56" (65mm) of precipitation is typically accumulated. In Green Bay, during the entire year, the rain falls for 130.8 days and collects up to 24.8" (630mm) of precipitation.

Snowfall

Months with snowfall in Green Bay are January through May, October through December. In Green Bay, during April, snow falls for 4.3 days and regularly aggregates up to 2.72" (69mm) of snow. In Green Bay, during the entire year, snow falls for 63.7 days and aggregates up to 23.27" (591mm) of snow.

Ocean temperature

In April, the average ocean temperature in Green Bay is 38.8°F (3.8°C).
Note: For swimming, this is considered life-threatening and very dangerous. The water feels painfully cold, and hyperventilation quickly occurs. A specialized swimsuit is mandatory to reduce thermal damage.

Daylight

The average length of the day in April in Green Bay is 13h and 31min.
On the first day of the month, sunrise is at 6:32 am and sunset at 7:19 pm. On the last day of April, sunrise is at 5:43 am and sunset at 7:55 pm CDT.

Sunshine

The average sunshine in April in Green Bay is 7.2h.

UV index

The average daily maximum UV index in April is 3. A UV Index of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV radiation for ordinary individuals.
Note: In April, the average maximum UV index of 3 translate into the following recommendations:
Take precautions - Protection against sunburn is recommended. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
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FAQ

What is the temperature in April in Green Bay?

The average high-temperature, in April, in Green Bay, is 50.2°F (10.1°C), while the average low-temperature is 35.2°F (1.8°C).

What is the least humid month in Green Bay?

April and May, with an average relative humidity of 76%, are the least humid months in Green Bay, Wisconsin.

What is the average humidity in April in Green Bay?

In April, the average relative humidity is 76%.

How much does it rain in Green Bay in April?

In Green Bay, Wisconsin, in April, during 14 rainfall days, 2.56" (65mm) of precipitation is typically accumulated.

How many days does it snow in April in Green Bay?

In April, in Green Bay, Wisconsin, it is snowing for 4.3 days. Throughout April, 2.72" (69mm) of snow is accumulated.

How cold is the water in April in Green Bay?

In Green Bay, Wisconsin, in April, the average water temperature is 38.8°F (3.8°C). For swimming, this is considered extremely cold, dangerous, and life-threatening. Unless suitably protected with insulated waterproof clothing, hypothermia quickly occurs.

What is the average length of the day in April in Green Bay?

In April, the average day length in Green Bay, Wisconsin, is 13h and 31min.

What time are sunrise and sunset in April in Green Bay?

In April, on the first day of the month, sunrise is at 6:32 am and sunset at 7:19 pm. On the last day of the month, sunrise is at 5:43 am and sunset at 7:55 pm CDT.

How many hours of sunshine does Green Bay have in April?

In April, the average sunshine duration in Green Bay, Wisconsin, is 7.2h.

How high is the UV index in April in Green Bay?

In April, the average daily maximum UV index in Green Bay, Wisconsin, is 3. A UV Index reading of 3 to 5 represents a medium health risk from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall days
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in April
Green Bay, WI

Average temperature in April - Green Bay, WI
  • Average high temperature in April: 50.2°F

The warmest month (with the highest average high temperature) is July (78.1°F).
The month with the lowest average high temperature is January (22.6°F).

  • Average low temperature in April: 35.2°F

The month with the highest average low temperature is July (60.4°F).
The coldest month (with the lowest average low temperature) is January (12.4°F).

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Average pressure in April
Green Bay, WI

Average pressure in April - Green 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).

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Average wind speed in April
Green Bay, WI

Average wind speed in April - Green Bay, WI
  • Average wind speed in April: 9.8mph

The windiest months (with the highest average wind speed) are January and February (10.1mph).
The calmest months (with the lowest average wind speed) are July and August (7.2mph).

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Average humidity in April
Green Bay, WI

Average humidity in April - Green Bay, WI
  • Average humidity in April: 76%

The month with the highest relative humidity is January (88%).
The months with the lowest relative humidity are April and May (76%).

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Average rainfall in April
Green Bay, WI

Average rainfall in April - Green Bay, WI
  • Average rainfall in April: 2.56"

The wettest month (with the highest rainfall) is May (3.31").
The driest month (with the least rainfall) is January (1.18").

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Average rainfall days in April
Green Bay, WI

Average rainfall days in April - Green Bay, WI
  • Average rainfall days in April: 14 days

The month with the highest number of rainy days is May (15.9 days).
The month with the least rainy days is February (3.7 days).

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Average snowfall in April
Green Bay, WI

Average snowfall in April - Green Bay, WI
  • Average snowfall in April: 2.72"

The month with the highest snowfall is February (5.79").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in April
Green Bay, WI

Average snowfall days in April - Green Bay, WI
  • Average snowfall days in April: 4.3 days

The month with the highest number of snowfall days is January (15.9 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average sea temperature in April
Green Bay, WI

Average sea temperature in April - Green Bay, WI
  • Average sea temperature in April: 38.8°F

The best month for swimming (with the highest average sea temperature) is August (67.6°F).
The coldest month (with the lowest average sea temperature) is February (36.1°F).

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Average daylight in April /
Average sunshine in April
Green Bay, WI

Average daylight in April / Average sunshine in April - Green Bay, WI
  • Average daylight in April: 13h and 31min

The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).

  • Average sunshine in April: 7h and 12min

The month with the most sunshine is July (Average sunshine: 10h and 6min).
The month with the least sunshine is February (Average sunshine: 3h and 24min).

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Average sunshine days in April
Green Bay, WI

Average sunshine days in April - Green Bay, WI
  • Average sunshine days in April: 11.6 days

The months with the most sunshine days are September and November (17 days).
The month with the least sunshine days is April (11.6 days).

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Average UV index in April
Green Bay, WI

Average UV index in April - Green Bay, WI
  • Average UV index in April: 3

The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 1).

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Average cloud cover in April
Green Bay, WI

Average cloud cover in April - Green Bay, WI
  • Average cloud cover in April: 52

The month with the most cloud cover is January (Cloud cover 65).
The months with the least cloud cover are July and August (Cloud cover 33).

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Average visibility in April
Green Bay, WI

Average visibility in April - Green Bay, WI
  • Average visibility in April: 6mi

The months with the highest visibility are March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January and February (5mi).

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