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

Weather in February

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

Weather in March

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

Weather in April

April is a fresh spring month in Green Bay, Wisconsin, with an average temperature ranging between max 50.2°F (10.1°C) and min 35.2°F (1.8°C). In Green Bay, the average high-temperature in April 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

The last month of the spring, May, is an enjoyable month in Green Bay, Wisconsin, 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 rises from a cool 50.2°F (10.1°C) in April to a comfortable 63.3°F (17.4°C). Weather in May »

Weather in June

June, the first month of the summer in Green Bay, is a pleasant month, with an average temperature fluctuating between 72.1°F (22.3°C) and 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 an agreeable 72.1°F (22.3°C). Weather in June »

Weather in July

July in Green Bay, Wisconsin, is a warm summer month, with temperature in the range of an average low of 60.4°F (15.8°C) and an average high of 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 an average temperature fluctuating between 59.4°F (15.2°C) and 77°F (25°C). In Green Bay, Wisconsin, the average high-temperature in August is relatively the same as in July - a still moderately hot 77°F (25°C). Weather in August »

Weather in September

The first month of the autumn, September, is also an agreeable month in Green Bay, Wisconsin, 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 Green Bay, the average high-temperature in September marginally drops from a warm 77°F (25°C) in August to a pleasant 69.6°F (20.9°C). Weather in September »

Weather in October

October, the same as September, in Green Bay, Wisconsin, is a moderate autumn month, with an average temperature varying between 55.8°F (13.2°C) and 41.9°F (5.5°C). In Green Bay, Wisconsin, the average high-temperature in October decreases 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 also a wintry month, with an average temperature fluctuating between 30.7°F (-0.7°C) and 41.7°F (5.4°C). In November, the average high-temperature decreases from a moderate 55.8°F (13.2°C) in October to a wintry 41.7°F (5.4°C). Weather in November »

Weather in December

The first month of the winter, December, is still a freezing cold month in Green Bay, Wisconsin, with temperature in the range of an average high of 28.8°F (-1.8°C) and an average low of 19.9°F (-6.7°C). In December, the average high-temperature decreases from a wintry 41.7°F (5.4°C) in November to a freezing 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?

January is the most humid month in Green Bay, with an average relative humidity of 88%.

What is the driest month in Green Bay?

The month with the least rainfall in Green Bay, Wisconsin, is January, when the rain falls for 4.6 days and typically collects 1.18" (30mm) of precipitation.

How many days does it rain in Green Bay?

Throughout the year, in Green Bay, 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 much 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.

When is 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.

What is the snowiest month in Green Bay?

The month with the most snowfall is February, when snow falls for 13.9 days and typically aggregates up to 5.79" (147mm) of snow.

What is the month with the coldest ocean 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?

The month with the least sunshine is February, 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?

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

What is the wettest month in Green Bay?

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

When it does not snow in Green Bay?

June through September are months without snowfall.

When are the longest days in Green Bay?

With an average of 15h and 30min of daylight, June has the longest days of the year.

When is the highest UV index in Green Bay?

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

What is the warmest month in Green Bay?

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.

What month has the most sunshine in Green Bay?

The month with the most sunshine in Green Bay is July, with an average of 10.1h of sunshine.

What month is the ocean warmest in Green Bay?

The month with the warmest seawater in Green Bay 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?

The month with the shortest days is December, 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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