August weather forecast
Green Bay, WI

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

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).

Temperature

In Green Bay, the average high-temperature in August is essentially the same as in July - a still moderately hot 77°F (25°C). In Green Bay, in August, the average low-temperature is 59.4°F (15.2°C).

Humidity

In August, the average relative humidity is 79%.

Rainfall

In Green Bay, in August, during 14.3 rainfall days, 1.93" (49mm) of precipitation is typically accumulated. In Green Bay, Wisconsin, during the entire year, the rain falls for 130.8 days and collects up to 24.8" (630mm) of precipitation.

Snowfall

In Green Bay, snow does not fall in June through September.

Ocean temperature

The month with the warmest seawater in Green Bay, Wisconsin, is August, with an average ocean temperature of 67.6°F (19.8°C).
Note: For most, swimming in 67.6°F (19.8°C) is not an enjoyable activity. Furthermore, controlling your breathing becomes progressively more difficult as the water temperature decreases from 69.8°F (21°C) to 59°F (15°C).

Daylight

In August, the average length of the day is 13h and 59min.
On the first day of August in Green Bay, sunrise is at 5:39 am and sunset at 8:17 pm. On the last day of the month, sunrise is at 6:13 am and sunset at 7:30 pm CDT.

Sunshine

In Green Bay, the average sunshine in August is 9.8h.

UV index

June through August, with an average maximum UV index of 5, are months with the highest UV index in Green Bay. 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 5 in August transform into the following instructions:
Take precautions. Light skin individuals may get burned in less than 30 minutes. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
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FAQ

What is the temperature in August in Green Bay?

The average high-temperature, in August, in Green Bay, Wisconsin, is 77°F (25°C), while the average low-temperature is 59.4°F (15.2°C).

What is the average humidity in August in Green Bay?

The average relative humidity in August is 79%.

How many days does it rain in August in Green Bay?

In Green Bay, in August, it is raining for 14.3 days, with typically 1.93" (49mm) of accumulated precipitation.

When it does not snow in Green Bay?

In Green Bay, Wisconsin, snow does not fall in June through September.

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 ocean temperature in August in Green Bay?

In August, the average ocean temperature in Green Bay, Wisconsin, is 67.6°F (19.8°C). For swimming, a surface water temperature of 67.6°F (19.8°C) is not enjoyable for the majority. It is not considered safe, as controlling breathing becomes progressively more difficult as water temperature decreases below 69.8°F (21°C).

How many hours of daylight does Green Bay have in August?

In August, the average day length in Green Bay, Wisconsin, is 13h and 59min.

When are sunrise and sunset in August in Green Bay?

On the first day of August in Green Bay, Wisconsin, sunrise is at 5:39 am and sunset at 8:17 pm. On the last day of the month, sunrise is at 6:13 am and sunset at 7:30 pm CDT.

How long on average sun shines in August in Green Bay?

In Green Bay, Wisconsin, the average sunshine duration in August is 9.8h.

What are the months with the highest UV index in Green Bay?

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

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

In August, the average daily maximum UV index in Green Bay, Wisconsin, is 5. A UV Index of 3 to 5 symbolizes a medium health risk from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in August
Green Bay, WI

Average temperature in August - Green Bay, WI
  • Average high temperature in August: 77°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 August: 59.4°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 August
Green Bay, WI

Average pressure in August - Green Bay, WI
  • Average pressure in August: 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).

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Average wind speed in August
Green Bay, WI

Average wind speed in August - Green Bay, WI
  • Average wind speed in August: 7.2mph

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 August
Green Bay, WI

Average humidity in August - Green Bay, WI
  • Average humidity in August: 79%

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 August
Green Bay, WI

Average rainfall in August - Green Bay, WI
  • Average rainfall in August: 1.93"

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 August
Green Bay, WI

Average rainfall days in August - Green Bay, WI
  • Average rainfall days in August: 14.3 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 August
Green Bay, WI

Average snowfall in August - Green Bay, WI
  • Average snowfall in August: 0"

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 August
Green Bay, WI

Average snowfall days in August - Green Bay, WI
  • Average snowfall days in August: 0 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 August
Green Bay, WI

Average sea temperature in August - Green Bay, WI
  • Average sea temperature in August: 67.6°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 August /
Average sunshine in August
Green Bay, WI

Average daylight in August / Average sunshine in August - Green Bay, WI
  • Average daylight in August: 13h and 59min

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 August: 9h 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).

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Average sunshine days in August
Green Bay, WI

Average sunshine days in August - Green Bay, WI
  • Average sunshine days in August: 13.9 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 August
Green Bay, WI

Average UV index in August - Green Bay, WI
  • Average UV index in August: 5

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 August
Green Bay, WI

Average cloud cover in August - Green Bay, WI
  • Average cloud cover in August: 33

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 August
Green Bay, WI

Average visibility in August - Green Bay, WI
  • Average visibility in August: 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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