Climate and monthly weather forecast
Green Bay, WI

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

Weather in January

January, like December, is a freezing cold winter month in Green Bay, Wisconsin, with an average temperature ranging between min 12.4°F (-10.9°C) and max 22.6°F (-5.2°C). January is the coldest month, with an average high-temperature of 22.6°F (-5.2°C) and an average low-temperature of 12.4°F (-10.9°C). Weather in January »

Weather in February

The last month of the winter, February, is also a subzero cold month in Green Bay, Wisconsin, with an average temperature varying between 25.9°F (-3.4°C) and 14°F (-10°C). In Green Bay, the average high-temperature in February is almost the same as in January - a still freezing cold 25.9°F (-3.4°C). Weather in February »

Weather in March

The first month of the spring, March, is a cold month in Green Bay, Wisconsin, with an average temperature ranging between min 25.5°F (-3.6°C) and max 38.5°F (3.6°C). In March, the average high-temperature rises from a freezing cold 25.9°F (-3.4°C) in February to a cold 38.5°F (3.6°C). Weather in March »

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). 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). Weather in April »

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). 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). Weather in May »

Weather in June

The first month of the summer, June, is an agreeable month in Green Bay, Wisconsin, with temperature in the range of an average high of 72.1°F (22.3°C) and an average low of 54.1°F (12.3°C). In June, the average high-temperature marginally rises from an enjoyable 63.3°F (17.4°C) in May to a pleasant 72.1°F (22.3°C). Weather in June »

Weather in July

July is a warm summer month in Green Bay, Wisconsin, with an average temperature fluctuating between 60.4°F (15.8°C) and 78.1°F (25.6°C). With an average high-temperature of 78.1°F (25.6°C) and an average low-temperature of 60.4°F (15.8°C), July is the warmest month. Weather in July »

Weather in August

August, the last month of the summer in Green Bay, is another warm month, with temperature in the range of an average low of 59.4°F (15.2°C) and an average high of 77°F (25°C). In Green Bay, the average high-temperature in August is essentially the same as in July - a still moderately hot 77°F (25°C). Weather in August »

Weather in September

September, the first month of the autumn in Green Bay, is still a pleasant month, with temperature in the range of an average low of 52.3°F (11.3°C) and an average high of 69.6°F (20.9°C). In September, the average high-temperature marginally drops from a moderately hot 77°F (25°C) in August to an agreeable 69.6°F (20.9°C). Weather in September »

Weather in October

October, like September, is a moderate autumn month in Green Bay, Wisconsin, with an average temperature varying between 55.8°F (13.2°C) and 41.9°F (5.5°C). In October, the average high-temperature drops from an agreeable 69.6°F (20.9°C) in September to a moderate 55.8°F (13.2°C). Weather in October »

Weather in November

November, the last month of the autumn in Green Bay, is another cold month, with an average temperature varying between 41.7°F (5.4°C) and 30.7°F (-0.7°C). In November, the average high-temperature decreases from a moderate 55.8°F (13.2°C) in October to a cold 41.7°F (5.4°C). Weather in November »

Weather in December

December, the first month of the winter in Green Bay, is still a freezing cold month, with an average temperature varying between 28.8°F (-1.8°C) and 19.9°F (-6.7°C). In December, the average high-temperature drops from a cold 41.7°F (5.4°C) in November to a subzero cold 28.8°F (-1.8°C). Weather in December »
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FAQ

What is the coldest month in Green Bay?

The coldest month is January, with an average high-temperature of 22.6°F (-5.2°C) and an average low-temperature of 12.4°F (-10.9°C).

What is the most humid month in Green Bay?

The most humid month is January, with an average relative humidity of 88%.

What is the driest month in Green Bay?

January is the month with the least rainfall. Rain falls for 4.6 days and accumulates 1.18" (30mm) of precipitation.

How much does it rain in Green Bay?

Throughout the year, there are 130.8 rainfall days, and 24.8" (630mm) of precipitation is accumulated.

When does it snow in Green Bay?

January through May, October through December are months with snowfall in Green Bay, Wisconsin.

How many days does it snow in Green Bay?

In Green Bay, during the entire year, snow falls for 63.7 days and aggregates up to 23.27" (591mm) of snow.

What is the month with the lowest UV index in Green Bay?

January, February, November and December, with an average maximum UV index of 1, are months with the lowest UV index in Green Bay, Wisconsin.

When does it snow the most in Green Bay?

February is the month with the most snowfall. Snow falls for 13.9 days and accumulates 5.79" (147mm) of snow.

When is the ocean coldest in Green Bay?

The month with the coldest seawater in Green Bay is February, with an average ocean temperature of 36.1°F (2.3°C).

What is the month with the least sunshine in Green Bay?

February has the least sunshine of the year in Green Bay, with an average of 3.4h of sunshine.

When is Daylight Saving Time (DST) in Green Bay?

On Sunday, March 13. 2022, at 2:00 am, Daylight Saving Time starts, and the time zone changes from CST to CDT. Daylight Saving Time ends Sunday, November 6. 2022, at 2:00 am, and the time zone reverts from CDT to CST.

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 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.

When it does not snow in Green Bay?

June through September are months without snowfall in Green Bay.

When are the longest days in Green Bay?

The month with the longest days is June, with an average of 15h and 30min of daylight.

What is the month with the highest UV index in Green Bay?

The months with the highest UV index in Green Bay are June through August, with an average maximum UV index of 5.

What is the warmest month in Green Bay?

The warmest month in Green Bay is July, with an average high-temperature of 78.1°F (25.6°C) and an average low-temperature of 60.4°F (15.8°C).

What month has the most sunshine in Green Bay?

July has the most sunshine of the year in Green Bay, with an average of 10.1h of sunshine.

What is the month with the warmest ocean in Green Bay?

The month with the warmest seawater in Green Bay, Wisconsin, is August, with an average ocean temperature of 67.6°F (19.8°C).

What is the month with the shortest days in Green Bay?

December has the shortest days of the year in Green Bay, Wisconsin, with an average of 8h and 54min of daylight.

Average temperature
Green Bay, WI

Average temperature - Green Bay, WI

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).

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
Green Bay, WI

Average pressure - Green Bay, WI

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
Green Bay, WI

Average wind speed - Green Bay, WI

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
Green Bay, WI

Average humidity - Green Bay, WI

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
Green Bay, WI

Average rainfall - Green Bay, WI

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
Green Bay, WI

Average rainfall days - Green Bay, WI

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
Green Bay, WI

Average snowfall - Green Bay, WI

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
Green Bay, WI

Average snowfall days - Green Bay, WI

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
Green Bay, WI

Average sea temperature - Green Bay, WI

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 / Average sunshine
Green Bay, WI

Average daylight / Average sunshine - Green Bay, WI

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).

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
Green Bay, WI

Average sunshine days - Green Bay, WI

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
Green Bay, WI

Average UV index - Green Bay, WI

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 visibility
Green Bay, WI

Average visibility - Green Bay, WI

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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