May weather forecast
Port Arthur, WI

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Weather in May

The last month of the spring, May, is a comfortable month in Port Arthur, Wisconsin, with an average temperature varying between 64.4°F (18°C) and 44.2°F (6.8°C).

Temperature

The shift from April to May sees a distinct increase in the average high-temperature, escalating from a chilly 49.6°F (9.8°C) to a comfortable 64.4°F (18°C). Port Arthur's May nights cool down to an average low-temperature of 44.2°F (6.8°C).

Humidity

With an average relative humidity of 75%, May is the least humid month.

Rainfall

In May, the rain falls for 16.8 days. Throughout May, 2.83" (72mm) of precipitation is accumulated. In Port Arthur, during the entire year, the rain falls for 128.5 days and collects up to 23.94" (608mm) of precipitation.

Snowfall

January through May, October through December are months with snowfall in Port Arthur. May is the last month it regularly snows in Port Arthur. During 0.7 snowfall days, in May, Port Arthur aggregates 1.02" (26mm) of snow. Throughout the year, in Port Arthur, there are 88.7 snowfall days, and 35.87" (911mm) of snow is accumulated.

Daylight

In May, the average length of the day is 14h and 55min.
On the first day of the month, sunrise is at 5:51 am and sunset at 8:11 pm. On the last day of May, sunrise is at 5:19 am and sunset at 8:45 pm CDT.

Sunshine

In May, the average sunshine in Port Arthur is 8.3h.

UV index

The months with the highest UV index are May through August, with an average maximum UV index of 5. A UV Index value of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for average individuals.
Note: The maximum daily UV index of 5 in May converts into the following recommendations:
Exercise prudence. Persons with fair skin could be burned in under 30 minutes. Considering the strength of solar radiation at midday, one should avoid direct Sun exposure. Tightly woven clothing, when worn loosely, shields effectively against the Sun. Remember to consider! The UV radiation from the Sun can be intensified nearly twice by the reflection of snow.
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Frequently asked questions

What are the temperatures in Port Arthur in May?

The high-temperature, in May, in Port Arthur, is 64.4°F (18°C), while the low-temperature averages to 44.2°F (6.8°C).

What is the least humid month in Port Arthur?

May is the least humid month in Port Arthur, with an average relative humidity of 75%.

What is the average humidity in May in Port Arthur?

In May, the average relative humidity in Port Arthur, Wisconsin, is 75%.

How many days does it rain in May in Port Arthur?

In Port Arthur, Wisconsin, in May, during 16.8 rainfall days, 2.83" (72mm) of precipitation is typically accumulated.

What is the last month it snows in Port Arthur?

May is the last month it regularly snows in Port Arthur, Wisconsin. During 0.7 snowfall days, in May, Port Arthur aggregates 1.02" (26mm) of snow.

How many hours of daylight does Port Arthur have in May?

The average day length in May in Port Arthur is 14h and 55min.

What time are sunrise and sunset in May in Port Arthur?

On the first day of May in Port Arthur, sunrise is at 5:51 am and sunset at 8:11 pm. On the last day of the month, sunrise is at 5:19 am and sunset at 8:45 pm CDT.

How many hours of sunshine does Port Arthur have in May?

The average sunshine duration in May is 8.3h.

What is the month with the highest UV index in Port Arthur?

The months with the highest UV index in Port Arthur, Wisconsin, are May through August, with an average maximum UV index of 5.

What is the UV index intensity in May in Port Arthur?

In Port Arthur, the average daily maximum UV index in May is 5. A UV Index value of 3 to 5 symbolizes a medium health risk from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in May
Port Arthur, WI

Average temperature in May - Port Arthur, WI
  • Average high temperature in May: 64.4°F

The warmest month (with the highest average high temperature) is July (78.8°F).
The month with the lowest average high temperature is January (18.1°F).

  • Average low temperature in May: 44.2°F

The month with the highest average low temperature is July (58.5°F).
The coldest month (with the lowest average low temperature) is January (5.4°F).

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Average pressure in May
Port Arthur, WI

Average pressure in May - Port Arthur, WI
  • Average pressure in May: 29.95"Hg

The months with the highest atmospheric pressure are January and February (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).

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Average wind speed in May
Port Arthur, WI

Average wind speed in May - Port Arthur, WI
  • Average wind speed in May: 8mph

The windiest month (with the highest average wind speed) is April (8.8mph).
The calmest month (with the lowest average wind speed) is August (6.6mph).

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Average humidity in May
Port Arthur, WI

Average humidity in May - Port Arthur, WI
  • Average humidity in May: 75%

The months with the highest relative humidity are January and February (92%).
The month with the lowest relative humidity is May (75%).

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Average rainfall in May
Port Arthur, WI

Average rainfall in May - Port Arthur, WI
  • Average rainfall in May: 2.83"

The wettest month (with the highest rainfall) is June (3.43").
The driest month (with the least rainfall) is January (0.98").

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Average rainfall days in May
Port Arthur, WI

Average rainfall days in May - Port Arthur, WI
  • Average rainfall days in May: 16.8 days

The month with the highest number of rainy days is May (16.8 days).
The month with the least rainy days is February (2.9 days).

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Average snowfall in May
Port Arthur, WI

Average snowfall in May - Port Arthur, WI
  • Average snowfall in May: 1.02"

The month with the highest snowfall is December (7.28").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in May
Port Arthur, WI

Average snowfall days in May - Port Arthur, WI
  • Average snowfall days in May: 0.7 days

The month with the highest number of snowfall days is January (19.4 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
Port Arthur, WI

Average daylight in May / Average sunshine in May - Port Arthur, WI
  • Average daylight in May: 14h and 5min

The month with the longest days is June (Average daylight: 15h and 36min).
The month with the shortest days is December (Average daylight: 8h and 48min).

  • Average sunshine in May: 8h and 2min

The month with the most sunshine is July (Average sunshine: 9h and 36min).
The months with the least sunshine are January and February (Average sunshine: 2h and 36min).

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Average sunshine days in May
Port Arthur, WI

Average sunshine days in May - Port Arthur, WI
  • Average sunshine days in May: 11.6 days

The month with the most sunshine days is October (16 days).
The months with the least sunshine days are February and April (10 days).

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Average UV index in May
Port Arthur, WI

Average UV index in May - Port Arthur, WI
  • Average UV index in May: 5

The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January, February and December (UV index 1).

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Average cloud cover in May
Port Arthur, WI

Average cloud cover in May - Port Arthur, WI
  • Average cloud cover in May: 46

The months with the most cloud cover are January and February (Cloud cover 75).
The months with the least cloud cover are July and August (Cloud cover 38).

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Average visibility in May
Port Arthur, WI

Average visibility in May - Port Arthur, WI
  • Average visibility in May: 6mi

The months with the highest visibility are May and June (6mi).
The months with the lowest visibility are January, February and December (4mi).

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Port Arthur, Wisconsin, USA

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