Green Bay
Wisconsin, USA
Long-term weather forecast
Long-term weather forecast

August weather forecast and climate
Green Bay, WI

An aerial panorama of the sun setting over Green Bay in Wisconsin
An aerial panorama of the sun setting over Green Bay in Wisconsin
August, the last month of the summer, in Green Bay, is also a moderately hot month, with average temperature varying between 56.8°F (13.8°C) and 77.7°F (25.4°C).

Temperature

In Green Bay, the average high-temperature in August is practically the same as in July - a still warm 77.7°F (25.4°C). The average low-temperature, in August, is 56.8°F (13.8°C).

Humidity

In Green Bay, the average relative humidity is 75.1%.

Rainfall

In August, the rain falls for 10.4 days. Throughout August, 3.4" (85.6mm) of precipitation is accumulated. In Green Bay, Wisconsin, during the entire year, the rain falls for 123 days and collects up to 29.5" (749.9mm) of precipitation.

Snowfall

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

Ocean temperature

The month with the warmest seawater 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 Green Bay, the average length of the day is 14h.

Sunshine

In August, the average sunshine in Green Bay, Wisconsin, is 9h.

UV index

In Green Bay, the average daily maximum UV index in August is 7. A UV Index of 6 to 7 symbolizes a high health risk from unsafe exposure to the UV radiation for the ordinary person.
Note: The average daily UV index of 7 in August transform into the following instructions:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.

What is the temperature in August in Green Bay?

In August, in Green Bay, Wisconsin, the average high-temperature is 77.7°F (25.4°C), and the average low-temperature is 56.8°F (13.8°C).

What is the average humidity in August in Green Bay?

In August, the average relative humidity in Green Bay is 75.1%.

How much does it rain in Green Bay in August?

In Green Bay, in August, during 10.4 rainfall days, 3.4" (85.6mm) of precipitation is typically accumulated.

When it does not snow in Green Bay?

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

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 ocean temperature in August in Green Bay?

In August, the average ocean temperature is 67.6°F (19.8°C). Swimming in 67.6°F (19.8°C) is not enjoyable for the majority. Controlling breathing becomes progressively more difficult as surface water temperature decreases below 69.8°F (21°C).

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

In Green Bay, the average length of the day in August is 14h.

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

In August, the average sunshine is 9h.

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

In August, the average daily maximum UV index in Green Bay, Wisconsin, is 7. A UV Index reading of 6 to 7 represents a high hazard to health from unprotected exposure to the UV radiation.
Average temperature in August - Green Bay, WI
  • Average high temperature in August: 77.7°F

The warmest month (with the highest average high temperature) is July (79.8°F).
The month with the lowest average high temperature is January (24.3°F).

  • Average low temperature in August: 56.9°F

The month with the highest average low temperature is July (58.4°F).
The coldest month (with the lowest average low temperature) is January (9°F).

Average humidity in August - Green Bay, WI
  • Average humidity in August: 75.1%

The month with the highest relative humidity is December (77.3%).
The month with the lowest relative humidity is May (65.9%).

Average rainfall in August - Green Bay, WI
  • Average rainfall in August: 3.4"

The wettest month (with the highest rainfall) is June (3.9").
Driest months (with the lowest rainfall) are January and February (1.1").

Average rainfall days in August - Green Bay, WI
  • Average rainfall days in August: 10.4 days

The month with the highest number of rainy days is May (11.4 days).
The month with the lowest number of rainy days is February (8.4 days).

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

The month with the highest snowfall is December (13.1").
Months with the lowest snowfall are June, July, August and September (0").

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 (9.6 days).
Months with the lowest number of snowfall days are June, July, August and September (0 days).

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).

Average daylight in August / Average sunshine in August - Green Bay, WI
  • Average daylight in August: 14h

The month with the longest days is June (Average daylight: 15.5h).
The month with shortest days is December (Average daylight: 8.9h).

  • Average sunshine in August: 9h

Months with most sunshine are June and July (Average sunshine: 10.1h).
Months with least sunshine are November and December (Average sunshine: 3.6).

Average UV index in August - Green Bay, WI
  • Average UV index in August: 7

Months with the highest UV index are June and July (UV index 8).
Months with the lowest UV index are January and December (UV index 1).