August weather forecast
Milwaukee, WI

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The modern Milwaukee City and Lake Michigan in Wisconsin, USA
The modern Milwaukee City and Lake Michigan in Wisconsin, USA

Weather in August

August in Milwaukee still clings to the warm clutch of summer, albeit with subtle signs of approaching fall. Winds start to pick up gradually, serving as a prelude to the cooler months to come. The sea temperature marking its highest point at 71.9°F (22.2°C) symbolizes the last throes of heat. However, the charm of lazy summer days and warm nights persists, eventually giving way to a cooler, calmer September.

Temperature

The average high-temperature for August is a still warm 77°F (25°C), closely aligning with the temperature of the preceding month. Milwaukee encounters a steady low-temperature average of 63.9°F (17.7°C) throughout the month of August.

Humidity

In August, the average relative humidity is 77%.

Rainfall

In Milwaukee, in August, it is raining for 8.7 days, with typically 0.55" (14mm) of accumulated precipitation. In Milwaukee, Wisconsin, during the entire year, the rain falls for 75.6 days and collects up to 5.83" (148mm) of precipitation.

Snowfall

In Milwaukee, snow does not fall in May through September.

Ocean temperature

With an average ocean temperature of 72°F (22.2°C), August is the month with the warmest seawater.
Note: Factor in your tolerance to cold, the sunshine, the wind, and the air's warmth, and a swim in 72°F (22.2°C) might be tempting. It is interesting to note that Olympians compete in 77°F (25°C) to 82.4°F (28°C) water temperatures.

Daylight

The average length of the day in August is 13h and 53min.
On the first day of the month, sunrise is at 5:43 am and sunset at 8:12 pm. On the last day of August, in Milwaukee, sunrise is at 6:15 am and sunset at 7:27 pm CDT.

Sunshine

July and August, with an average of 10.4h of sunshine, are months with the most sunshine.

UV index

The average daily maximum UV index in August is 5. A UV Index of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV radiation for average individuals.
Note: The daily high UV index of 5 during August translates into the following recommendations:
Guard yourself - Precautionary measures against sun damage are advocated. Being exposed to the midday Sun can have harmful effects due to strong UV radiation; always take precautions. To cut down UV radiation exposure by about half, sport a wide-brim hat. Alert! The Sun's UV rays are heightened by the reflection of sand and water.

Frequently asked questions

What are August temperatures?

In August, in Milwaukee, the average high-temperature is 77°F (25°C), and the average low-temperature is 63.9°F (17.7°C).

What is the average humidity in August?

In Milwaukee, the average relative humidity in August is 77%.

How many days does it rain in August?

In Milwaukee, in August, during 8.7 rainfall days, 0.55" (14mm) of precipitation is typically accumulated.

When it does not snow?

In Milwaukee, Wisconsin, snow does not fall in May through September.

When is the ocean warmest?

The month with the warmest seawater is August, with an average ocean temperature of 72°F (22.2°C).

What is the ocean temperature in August?

In Milwaukee, in August, the average water temperature is 72°F (22.2°C). For individuals prone to feeling cold, swimming in 73.4°F (23°C) is still regarded as intolerable. A wetsuit is not a necessity, but sunshine, wind, and air temperature are essential factors for relishing swimming at 72°F (22.2°C).

What is the average length of the day in August?

In Milwaukee, the average day length in August is 13h and 53min.

When is the sunrise / sunset in August?

On the first day of August in Milwaukee, sunrise is at 5:43 am and sunset at 8:12 pm. On the last day of the month, sunrise is at 6:15 am and sunset at 7:27 pm CDT.

What are the months with the most sunshine?

July and August, with an average of 10.4h of sunshine, are months with the most sunshine.

How long on average sun shines in August?

The average sunshine duration in August is 10.4h.

What is the UV index intensity in August?

In August, the average daily maximum UV index is 5. A UV Index estimate of 3 to 5 represents a medium health risk from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in August
Milwaukee, WI

Average temperature in August - Milwaukee, WI
  • Average high temperature in August: 77°F

The warmest month (with the highest average high temperature) is July (77.7°F).
The month with the lowest average high temperature is January (26.1°F).

  • Average low temperature in August: 63.9°F

The month with the highest average low temperature is July (64°F).
The coldest month (with the lowest average low temperature) is January (15.8°F).

Average pressure in August
Milwaukee, WI

Average pressure in August - Milwaukee, WI
  • Average pressure in August: 29.97"Hg

The months with the highest atmospheric pressure are January, February and March (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).

Average wind speed in August
Milwaukee, WI

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

The windiest month (with the highest average wind speed) is January (11.4mph).
The calmest month (with the lowest average wind speed) is July (7.1mph).

Average humidity in August
Milwaukee, WI

Average humidity in August - Milwaukee, WI
  • Average humidity in August: 77%

The month with the highest relative humidity is January (85%).
The month with the lowest relative humidity is October (75%).

Average rainfall in August
Milwaukee, WI

Average rainfall in August - Milwaukee, WI
  • Average rainfall in August: 0.55"

The wettest month (with the highest rainfall) is July (0.75").
The driest months (with the least rainfall) are February and December (0.28").

Average rainfall days in August
Milwaukee, WI

Average rainfall days in August - Milwaukee, WI
  • Average rainfall days in August: 8.7 days

The month with the highest number of rainy days is June (9.9 days).
The months with the least rainy days are January and February (1.8 days).

Average snowfall in August
Milwaukee, WI

Average snowfall in August - Milwaukee, WI
  • Average snowfall in August: 0"

The month with the highest snowfall is January (1.1").
The months with the least snowfall are May, June, July, August and September (0").

Average snowfall days in August
Milwaukee, WI

Average snowfall days in August - Milwaukee, WI
  • Average snowfall days in August: 0 days

The month with the highest number of snowfall days is January (6.6 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average sea temperature in August
Milwaukee, WI

Average sea temperature in August - Milwaukee, WI
  • Average sea temperature in August: 71.9°F

The best month for swimming (with the highest average sea temperature) is August (71.9°F).
The coldest month (with the lowest average sea temperature) is February (36°F).

Average daylight in August /
Average sunshine in August
Milwaukee, WI

Average daylight in August / Average sunshine in August - Milwaukee, WI
  • Average daylight in August: 13h and 5min

The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).

  • Average sunshine in August: 10h and 2min

The months with the most sunshine are July and August (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 3h and 30min).

Average sunshine days in August
Milwaukee, WI

Average sunshine days in August - Milwaukee, WI
  • Average sunshine days in August: 20.1 days

The month with the most sunshine days is January (25.4 days).
The month with the least sunshine days is June (17.3 days).

Average UV index in August
Milwaukee, WI

Average UV index in August - Milwaukee, WI
  • Average UV index in August: 5

The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).

Average cloud cover in August
Milwaukee, WI

Average cloud cover in August - Milwaukee, WI
  • Average cloud cover in August: 28

The month with the most cloud cover is January (Cloud cover 63).
The months with the least cloud cover are July and August (Cloud cover 28).

Average visibility in August
Milwaukee, WI

Average visibility in August - Milwaukee, WI
  • Average visibility in August: 6mi

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

Milwaukee, Wisconsin, USA

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