May 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 May

The month of May implies a definitive plunge into warmer weather for Milwaukee. The vestiges of winter's chill are replaced with noticeably warmer temperatures and increasingly longer days. The substantial increase in sea temperatures ushers in the inhabitants of the sea world. There is a slight rise in rainfall patterns but not enough to dampen the arrival of summer. As June rolls around, Milwaukee braces for peak summer conditions and all the associated weather traits.

Temperature

The rise of average high-temperatures is seen in May, with an increase from a fresh 50°F (10°C) in April to a refreshing 61.7°F (16.5°C). The temperature lowers to an average of 47.8°F (8.8°C) during May nights.

Humidity

In May, the average relative humidity is 78%.

Rainfall

In Milwaukee, in May, it is raining for 9.4 days, with typically 0.71" (18mm) of accumulated precipitation. Throughout the year, there are 75.6 rainfall days, and 5.83" (148mm) of precipitation is accumulated.

Snowfall

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

Ocean temperature

In Milwaukee, the average seawater temperature in May is 40.8°F (4.9°C).
Note: When swimming, this is deemed life-endangering and extremely risky. The painful cold water instigates fast-paced hyperventilation. Wearing a specialized swimsuit is necessary to lessen thermal harm.

Daylight

The average length of the day in May is 14h and 41min.
On the first day of the month, sunrise is at 5:44 am and sunset at 7:53 pm. On the last day of May, sunrise is at 5:15 am and sunset at 8:23 pm CDT.

Sunshine

In May, the average sunshine in Milwaukee is 8.5h.

UV index

In May, the average daily maximum UV index is 4. A UV Index estimate of 3 to 5 represents a medium health hazard from exposure to the Sun's UV rays for ordinary individuals.
Note: In May, the maximum UV index of 4 suggests these recommendations:
Be mindful. Individuals with a lighter skin tone may suffer burns in less than 30 minutes. Limiting exposure to the direct Sun during midday hours can help prevent harmful UV radiation effects. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage. Consider carefully! The reflective quality of snow can almost double the intensity of the Sun's UV radiation.

Frequently asked questions

What is the average May temperature?

The high-temperature, in May, in Milwaukee, is 61.7°F (16.5°C), while the low-temperature averages to 47.8°F (8.8°C).

What is the average humidity in May?

In May, the average relative humidity is 78%.

How much does it rain in May?

In Milwaukee, in May, it is raining for 9.4 days, with typically 0.71" (18mm) of accumulated precipitation.

When it does not snow?

May through September are months without snowfall.

Does it snow in May?

In May, it doesn't snow. April is the latest month when it typically snows.

What is the water temperature in May?

In Milwaukee, in May, the average water temperature is 40.8°F (4.9°C). For swimming, this is considered extremely cold, dangerous, and life-threatening. Unless suitably protected with insulated waterproof clothing, hypothermia quickly occurs.

How many hours of daylight does Milwaukee have in May?

In May, the average day length is 14h and 41min.

When are sunrise and sunset in May?

On the first day of May, sunrise is at 5:44 am and sunset at 7:53 pm. On the last day of the month, sunrise is at 5:15 am and sunset at 8:23 pm CDT.

How many hours of sunshine does Milwaukee have in May?

In May, the average sunshine duration is 8.5h.

What is the UV index intensity in May?

The average daily maximum UV index in May is 4. A UV Index of 3 to 5 symbolizes a moderate health threat from exposure to the Sun's UV radiation.
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 May
Milwaukee, WI

Average temperature in May - Milwaukee, WI
  • Average high temperature in May: 61.7°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 May: 47.8°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 May
Milwaukee, WI

Average pressure in May - Milwaukee, WI
  • Average pressure in May: 29.96"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 May
Milwaukee, WI

Average wind speed in May - Milwaukee, WI
  • Average wind speed in May: 8.8mph

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 May
Milwaukee, WI

Average humidity in May - Milwaukee, WI
  • Average humidity in May: 78%

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

Average rainfall in May
Milwaukee, WI

Average rainfall in May - Milwaukee, WI
  • Average rainfall in May: 0.71"

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 May
Milwaukee, WI

Average rainfall days in May - Milwaukee, WI
  • Average rainfall days in May: 9.4 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 May
Milwaukee, WI

Average snowfall in May - Milwaukee, WI
  • Average snowfall in May: 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 May
Milwaukee, WI

Average snowfall days in May - Milwaukee, WI
  • Average snowfall days in May: 0.2 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 May
Milwaukee, WI

Average sea temperature in May - Milwaukee, WI
  • Average sea temperature in May: 40.8°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 May /
Average sunshine in May
Milwaukee, WI

Average daylight in May / Average sunshine in May - Milwaukee, WI
  • Average daylight in May: 14h and 4min

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 May: 8h and 3min

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 May
Milwaukee, WI

Average sunshine days in May - Milwaukee, WI
  • Average sunshine days in May: 18.1 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 May
Milwaukee, WI

Average UV index in May - Milwaukee, WI
  • Average UV index in May: 4

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 May
Milwaukee, WI

Average cloud cover in May - Milwaukee, WI
  • Average cloud cover in May: 43

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 May
Milwaukee, WI

Average visibility in May - Milwaukee, WI
  • Average visibility in May: 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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