May weather forecast
Brown Deer, WI

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Weather in May

May, the last month of the spring in Brown Deer, is a refreshing month, with an average temperature fluctuating between 58.6°F (14.8°C) and 47.5°F (8.6°C).

Temperature

May's arrival coincides with a temperature rise, moving from April's chilly 48.2°F (9°C) to a mild 58.6°F (14.8°C). Brown Deer's average low-temperature is measured at a frosty 47.5°F (8.6°C) during May.

Humidity

In Brown Deer, the average relative humidity in May is 79%.

Rainfall

In Brown Deer, during May, the rain falls for 15.2 days and regularly aggregates up to 2.28" (58mm) of precipitation. Throughout the year, in Brown Deer, there are 129.5 rainfall days, and 18.62" (473mm) of precipitation is accumulated.

Snowfall

May through September are months without snowfall.

Daylight

The average length of the day in May in Brown Deer, Wisconsin, is 14h and 41min.
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 5:14 am and sunset at 8:24 pm CDT.

Sunshine

The average sunshine in May in Brown Deer is 8.9h.

UV index

In May, the average daily maximum UV index in Brown Deer, Wisconsin, is 4. A UV Index value of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV radiation for the ordinary person.
Note: The UV index of 4 during May translates into the following guidance:
Heed the precautions - Suggestions to avoid sunburn are made. Avoiding the Sun during its peak radiation time around midday is a healthy practice. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses. Note well! The intensity of the Sun's UV rays can be nearly doubled by snow reflection.
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Frequently asked questions

What are May temperatures in Brown Deer?

Brown Deer in May has an average high-temperature of 58.6°F (14.8°C) and an average low-temperature of 47.5°F (8.6°C).

What is the average humidity in May in Brown Deer?

In May, the average relative humidity in Brown Deer, Wisconsin, is 79%.

How many days does it rain in May in Brown Deer?

In Brown Deer, Wisconsin, during May, the rain falls for 15.2 days and regularly aggregates up to 2.28" (58mm) of precipitation.

When it does not snow in Brown Deer?

In Brown Deer, snow does not fall in May through September.

Does it snow in Brown Deer in May?

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

What is the average length of the day in May in Brown Deer?

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

When is the sunrise / sunset in May in Brown Deer?

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 5:14 am and sunset at 8:24 pm CDT.

How many hours of sunshine does Brown Deer have in May?

The average sunshine duration in May is 8.9h.

How high is the UV index in May in Brown Deer?

The average daily maximum UV index in May in Brown Deer is 4. A UV Index reading of 3 to 5 represents a moderate vulnerability from 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 May
Brown Deer, WI

Average temperature in May - Brown Deer, WI
  • Average high temperature in May: 58.6°F

The warmest month (with the highest average high temperature) is July (75.7°F).
The month with the lowest average high temperature is January (26.8°F).

  • Average low temperature in May: 47.5°F

The month with the highest average low temperature is July (64.8°F).
The coldest month (with the lowest average low temperature) is January (17.1°F).

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Average pressure in May
Brown Deer, WI

Average pressure in May - Brown Deer, 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).

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Average wind speed in May
Brown Deer, WI

Average wind speed in May - Brown Deer, WI
  • Average wind speed in May: 9.4mph

The windiest month (with the highest average wind speed) is January (12.6mph).
The calmest month (with the lowest average wind speed) is July (7.7mph).

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Average humidity in May
Brown Deer, WI

Average humidity in May - Brown Deer, WI
  • Average humidity in May: 79%

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

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Average rainfall in May
Brown Deer, WI

Average rainfall in May - Brown Deer, WI
  • Average rainfall in May: 2.28"

The wettest month (with the highest rainfall) is July (2.56").
The driest month (with the least rainfall) is December (0.71").

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Average rainfall days in May
Brown Deer, WI

Average rainfall days in May - Brown Deer, WI
  • Average rainfall days in May: 15.2 days

The months with the highest number of rainy days are May, June and July (15.2 days).
The month with the least rainy days is February (4.5 days).

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Average snowfall in May
Brown Deer, WI

Average snowfall in May - Brown Deer, WI
  • Average snowfall in May: 0"

The month with the highest snowfall is January (2.17").
The months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days in May
Brown Deer, WI

Average snowfall days in May - Brown Deer, WI
  • Average snowfall days in May: 0.1 days

The month with the highest number of snowfall days is January (12.8 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average daylight in May /
Average sunshine in May
Brown Deer, WI

Average daylight in May / Average sunshine in May - Brown Deer, 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 5min

The months with the most sunshine are July and August (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 3h and 36min).

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Average sunshine days in May
Brown Deer, WI

Average sunshine days in May - Brown Deer, WI
  • Average sunshine days in May: 13.2 days

The month with the most sunshine days is December (18.2 days).
The month with the least sunshine days is June (12.3 days).

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Average UV index in May
Brown Deer, WI

Average UV index in May - Brown Deer, WI
  • Average UV index in May: 4

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

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Average cloud cover in May
Brown Deer, WI

Average cloud cover in May - Brown Deer, WI
  • Average cloud cover in May: 41

The month with the most cloud cover is January (Cloud cover 62).
The month with the least cloud cover is July (Cloud cover 26).

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Average visibility in May
Brown Deer, WI

Average visibility in May - Brown Deer, 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).

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Brown Deer, Wisconsin, USA

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