May weather forecast and climate
Port Arthur, TX

The inlet of the ship channel on Port Arthur, Texas
The inlet of the ship channel on Port Arthur, Texas

Weather in May

The last month of the spring, May, is also a moderately hot month in Port Arthur, Texas, with average temperature fluctuating between 71.1°F (21.7°C) and 83.3°F (28.5°C).

Temperature

In May, the average high-temperature slightly increases, from a moderately hot 76.5°F (24.7°C) in April, to a still warm 83.3°F (28.5°C). In May, in Port Arthur, the average low-temperature is 71.1°F (21.7°C).

Heat index

In May, the average heat index is evaluated at a hot 90.5°F (32.5°C). Take special precautions - heat exhaustion and heat cramps are expected. Heatstroke may occur with lengthy activity.
Note that heat index values are valued for light wind and location in the shade. With exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like', 'real feel', 'felt air temperature', or 'apparent temperature', is a measure that combines air temperature and relative humidity into a single value that indicates how hot the weather feels. This effect is individual, with diverse people perceiving weather differently for numerous reasons (clothing, differences in body mass, height, and shape, metabolic differences), and activity. Be aware that direct exposure to sunlight increases heat impact and may raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it is vital to remain hydrated, particularly during prolonged physical activities.

Humidity

In May, the average relative humidity is 75%.

Rainfall

In Port Arthur, in May, during 8.3 rainfall days, 1.06" (27mm) of precipitation is typically accumulated. Throughout the year, in Port Arthur, there are 132.6 rainfall days, and 12.09" (307mm) of precipitation is accumulated.

Snowfall

In Port Arthur, Texas, snow does not fall in January through November.

Daylight

The average length of the day in May is 13.7h.

Sunshine

The average sunshine in May is 10.3h.

UV index

May through August, with an average maximum UV index of 7, are months with the highest UV index in Port Arthur. A UV Index value of 6 to 7 symbolizes a high health risk from unsafe exposure to the UV radiation for the average person.
Note: The daily maximum UV index of 7 interpret into the following advice:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. 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.
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FAQ

What is the temperature in May in Port Arthur?

In May, in Port Arthur, Texas, the average high-temperature is 83.3°F (28.5°C), and the average low-temperature is 71.1°F (21.7°C). In May, the average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), which represents the influence of relative humidity on air temperature, is evaluated at 90.5°F (32.5°C).

What is the average humidity in May in Port Arthur?

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

How much does it rain in Port Arthur in May?

In Port Arthur, during May, the rain falls for 8.3 days and regularly aggregates up to 1.06" (27mm) of precipitation.

When it does not snow in Port Arthur?

In Port Arthur snow does not fall in January through November.

What is the average length of the day in May in Port Arthur?

The average length of the day in May is 13.7h.

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

In May, the average sunshine is 10.3h.

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

May through August, with an average maximum UV index of 7, are months with the highest UV index.

How high is the UV index in May in Port Arthur?

The average daily maximum UV index in May in Port Arthur, Texas, is 7. A UV Index of 6 to 7 symbolizes a high health risk from unprotected exposure to the UV radiation.

Average temperature in May
Port Arthur, TX

Average temperature in May - Port Arthur, TX
  • Average high temperature in May: 83.3°F

The warmest month (with the highest average high temperature) is August (91°F).
The month with the lowest average high temperature is January (59.5°F).

  • Average low temperature in May: 71.1°F

The month with the highest average low temperature is July (78.4°F).
The coldest month (with the lowest average low temperature) is January (46.9°F).

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Average pressure in May
Port Arthur, TX

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

The month with the highest atmospheric pressure is January (30.16").
The month with the lowest atmospheric pressure is June (29.93").

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Average wind speed in May
Port Arthur, TX

Average wind speed in May - Port Arthur, TX
  • Average wind speed in May: 9.3mph

The windiest month (with the highest average wind speed) is April (10.1mph).
The calmest month (with the lowest average wind speed) is August (7mph).

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Average humidity in May
Port Arthur, TX

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

The month with the highest relative humidity is February (81%).
The month with the lowest relative humidity is October (71%).

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Average rainfall in May
Port Arthur, TX

Average rainfall in May - Port Arthur, TX
  • Average rainfall in May: 1.06"

The wettest month (with the highest rainfall) is August (2.09").
The driest month (with the least rainfall) is April (0.43").

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Average rainfall days in May
Port Arthur, TX

Average rainfall days in May - Port Arthur, TX
  • Average rainfall days in May: 8.3 days

The month with the highest number of rainy days is August (17.9 days).
Months with the least rainy days are January and November (7.8 days).

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Average snowfall in May
Port Arthur, TX

Average snowfall in May - Port Arthur, TX
  • Average snowfall in May: 0"

The month with the highest snowfall is December (0.04").
Months with the least snowfall are January, February, March, April, May, June, July, August, September, October and November (0").

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Average snowfall days in May
Port Arthur, TX

Average snowfall days in May - Port Arthur, TX
  • Average snowfall days in May: 0 days

The month with the highest number of snowfall days is January (0.3 days).
Months with the least snowfall days are March, April, May, June, July, August, September, October and November (0 days).

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Average daylight in May /
Average sunshine in May
Port Arthur, TX

Average daylight in May / Average sunshine in May - Port Arthur, TX
  • Average daylight in May: 13.7h

The month with the longest days is June (Average daylight: 14.1h).
The month with the shortest days is December (Average daylight: 10.2h).

  • Average sunshine in May: 10.3h

The month with the most sunshine is August (Average sunshine: 10.7h).
The month with the least sunshine is December (Average sunshine: 5h).

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Average sunshine days in May
Port Arthur, TX

Average sunshine days in May - Port Arthur, TX
  • Average sunshine days in May: 20.8 days

The month with the most sunshine days is January (21.3 days).
The month with the least sunshine days is August (8.8 days).

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Average UV index in May
Port Arthur, TX

Average UV index in May - Port Arthur, TX
  • Average UV index in May: 7

Months with the highest UV index are May, June, July and August (UV index 7).
The month with the lowest UV index is December (UV index 3).

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Average cloud cover in May
Port Arthur, TX

Average cloud cover in May - Port Arthur, TX
  • Average cloud cover in May: 30

The month with the most cloud cover is February (Cloud cover 50).
The month with the least cloud cover is October (Cloud cover 26).

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Average visibility in May
Port Arthur, TX

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

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

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