May weather forecast
Green Bay, WI

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

Weather in May

May, the last month of the spring in Green Bay, is an enjoyable month, with an average temperature fluctuating between 63.3°F (17.4°C) and 45.3°F (7.4°C).

Temperature

In Green Bay, the average high-temperature in May increases from a fresh 50.2°F (10.1°C) in April to a comfortable 63.3°F (17.4°C). The average low-temperature, in May, is 45.3°F (7.4°C).

Humidity

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

Rainfall

The month with the most rainfall in Green Bay is May, when the rain falls for 15.9 days and typically aggregates up to 3.31" (84mm) of precipitation.

Snowfall

Months with snowfall are January through May, October through December. May is the last month it regularly snows. During 0.2 snowfall days, Green Bay aggregates 0.24" (6mm) of snow. Throughout the year, there are 63.7 snowfall days, and 23.27" (591mm) of snow is accumulated.

Ocean temperature

In Green Bay, in May, the average water temperature is 41.4°F (5.2°C).
Note: Swimming in 41.4°F (5.2°C) is considered dangerous. Unprotected immersion in temperatures below 50°F (10°C) causes quickly maximum intensity cold shock with hyperventilation.

Daylight

In Green Bay, the average length of the day in May is 14h and 49min.
On the first day of May, sunrise is at 5:41 am and sunset at 7:56 pm. On the last day of the month, sunrise is at 5:10 am and sunset at 8:28 pm CDT.

Sunshine

The average sunshine in May in Green Bay is 8.8h.

UV index

The average daily maximum UV index in May in Green Bay is 4. A UV Index value of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV rays for average individuals.
Note: The average daily UV index of 4 in May transform into the following instructions:
Take precautions - Protection against skin and eye damage is obliged. 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.
[Resources]

FAQ

What is the temperature in May in Green Bay?

In May, in Green Bay, the average high-temperature is 63.3°F (17.4°C), and the average low-temperature is 45.3°F (7.4°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.

What is the average humidity in May in Green Bay?

The average relative humidity in May in Green Bay, Wisconsin, is 76%.

What is the wettest month in Green Bay?

May is the month with the most rainfall in Green Bay. Rain falls for 15.9 days and accumulates 3.31" (84mm) of precipitation.

How much does it rain in Green Bay in May?

In May, in Green Bay, Wisconsin, the rain falls for 15.9 days. Throughout May, 3.31" (84mm) of precipitation is accumulated.

What is the last month it snows in Green Bay?

May is the last month it regularly snows in Green Bay, Wisconsin. During 0.2 snowfall days, in May, Green Bay aggregates 0.24" (6mm) of snow.

What is the water temperature in May in Green Bay?

In May, the average ocean temperature is 41.4°F (5.2°C). Swimming in 41.4°F (5.2°C) is considered life-threatening. Even a few minutes in 55.4°F (13°C) water is uncomfortable, and swimming below 50°F (10°C) may cause total loss of breathing control and cold shock, depending on a person's physique.

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

In May, the average day length in Green Bay is 14h and 49min.

When is the sunrise / sunset in May in Green Bay?

In May, on the first day of the month, sunrise is at 5:41 am and sunset at 7:56 pm. On the last day of the month, in Green Bay, sunrise is at 5:10 am and sunset at 8:28 pm CDT.

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

The average sunshine duration in May in Green Bay, Wisconsin, is 8.8h.

What is the UV index intensity in May in Green Bay?

In Green Bay, the average daily maximum UV index in May is 4. A UV Index of 3 to 5 symbolizes a moderate health threat from 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 May
Green Bay, WI

Average temperature in May - Green Bay, WI
  • Average high temperature in May: 63.3°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 May: 45.3°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).

[Resources]

Average pressure in May
Green Bay, WI

Average pressure in May - Green Bay, WI
  • Average pressure in May: 29.96"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).

[Resources]

Average wind speed in May
Green Bay, WI

Average wind speed in May - Green Bay, WI
  • Average wind speed in May: 8.7mph

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).

[Resources]

Average humidity in May
Green Bay, WI

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

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

[Resources]

Average rainfall in May
Green Bay, WI

Average rainfall in May - Green Bay, WI
  • Average rainfall in May: 3.31"

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

[Resources]

Average rainfall days in May
Green Bay, WI

Average rainfall days in May - Green Bay, WI
  • Average rainfall days in May: 15.9 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).

[Resources]

Average snowfall in May
Green Bay, WI

Average snowfall in May - Green Bay, WI
  • Average snowfall in May: 0.24"

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

[Resources]

Average snowfall days in May
Green Bay, WI

Average snowfall days in May - Green Bay, WI
  • Average snowfall days in May: 0.2 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).

[Resources]

Average sea temperature in May
Green Bay, WI

Average sea temperature in May - Green Bay, WI
  • Average sea temperature in May: 41.4°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).

[Resources]

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

Average daylight in May / Average sunshine in May - Green Bay, WI
  • Average daylight in May: 14h and 49min

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 May: 8h and 48min

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).

[Resources]

Average sunshine days in May
Green Bay, WI

Average sunshine days in May - Green Bay, WI
  • Average sunshine days in May: 13.3 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).

[Resources]

Average UV index in May
Green Bay, WI

Average UV index in May - Green Bay, WI
  • Average UV index in May: 4

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).

[Resources]

Average cloud cover in May
Green Bay, WI

Average cloud cover in May - Green Bay, WI
  • Average cloud cover in May: 42

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).

[Resources]

Average visibility in May
Green Bay, WI

Average visibility in May - Green Bay, WI
  • Average visibility in May: 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).

[Resources]

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location
* you will be automatically redirected to the weather forecast for your location