Climate and monthly weather forecast
Port Arthur, TX

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

Weather in January

January, the same as December, in Port Arthur, Texas, is a moderate winter month, with an average temperature varying between 59.5°F (15.3°C) and 46.9°F (8.3°C). January is the coldest month, with an average high-temperature of 59.5°F (15.3°C) and an average low-temperature of 46.9°F (8.3°C). Weather in January »

Weather in February

February, the last month of the winter in Port Arthur, is a comfortable month, with an average temperature varying between 51.4°F (10.8°C) and 63.1°F (17.3°C). The weather during February records an average high-temperature of a still refreshing 63.1°F (17.3°C), closely mirroring the preceding month. Weather in February »

Weather in March

The first month of the spring, March, is an agreeable month in Port Arthur, Texas, with temperature in the range of an average high of 70°F (21.1°C) and an average low of 57.6°F (14.2°C). A minor escalation in the average high-temperature is seen with the onset of March, moving from a comfortable 63.1°F (17.3°C) in February to a pleasant 70°F (21.1°C). Weather in March »

Weather in April

April is a warm spring month in Port Arthur, Texas, with an average temperature ranging between min 63°F (17.2°C) and max 76.5°F (24.7°C). April showcases a minor temperature ascent, adjusting from March's pleasant 70°F (21.1°C) to a warm 76.5°F (24.7°C). Weather in April »

Weather in May

The last month of the spring, May, is another warm month in Port Arthur, Texas, with an average temperature fluctuating between 83.3°F (28.5°C) and 71.1°F (21.7°C). Port Arthur, Texas, in May observes a minor temperature shift, with average high-temperatures adjusting from 76.5°F (24.7°C) in April to a still moderately hot 83.3°F (28.5°C). Weather in May »

Weather in June

The first month of the summer, June, is a hot month in Port Arthur, Texas, with an average temperature varying between 76.6°F (24.8°C) and 88.9°F (31.6°C). The coming of June brings a minor shift in Port Arthur's weather, with average high-temperatures adjusting from May's moderately hot 83.3°F (28.5°C) to a hot 88.9°F (31.6°C). Weather in June »

Weather in July

July, like June, is a hot summer month in Port Arthur, Texas, with an average temperature varying between 90.7°F (32.6°C) and 78.4°F (25.8°C). Port Arthur, Texas, experiences a recorded average high-temperature of a still hot 90.7°F (32.6°C) in July, closely aligned with June's 88.9°F (31.6°C). Weather in July »

Weather in August

The last month of the summer, August, is another tropical month in Port Arthur, Texas, with temperature in the range of an average high of 91°F (32.8°C) and an average low of 78.3°F (25.7°C). August, known for its average high temperature of 91°F (32.8°C) and an average low temperature of 78.3°F (25.7°C), is the warmest month. The heat index value during August is calculated to be a blazing hot 113°F (45°C). Weather in August »

Weather in September

September, the first month of the autumn in Port Arthur, is still a hot month, with an average temperature fluctuating between 86.9°F (30.5°C) and 74.1°F (23.4°C). Port Arthur experiences an average high-temperature of a still hot 86.9°F (30.5°C) with the onset of September, subtly varied from August's 91°F (32.8°C). Weather in September »

Weather in October

October, like September, in Port Arthur, Texas, is a moderately hot autumn month, with an average temperature fluctuating between 79.7°F (26.5°C) and 64.9°F (18.3°C). With October's onset, the weather reveals a slight temperature decrease, transitioning from a hot 86.9°F (30.5°C) in September to a warm 79.7°F (26.5°C). Weather in October »

Weather in November

The last month of the autumn, November, is also an agreeable month in Port Arthur, Texas, with an average temperature ranging between min 55.6°F (13.1°C) and max 68.9°F (20.5°C). The transition into November indicates a reduction in the average high-temperature, down to a pleasant 68.9°F (20.5°C) from October's moderately hot 79.7°F (26.5°C). Weather in November »

Weather in December

The first month of the winter, December, is still a refreshing month in Port Arthur, Texas, with an average temperature varying between 61.9°F (16.6°C) and 50.2°F (10.1°C). The transition into December subtly indicates a reduction in the average high-temperature, down to a refreshing 61.9°F (16.6°C) from November's agreeable 68.9°F (20.5°C). Weather in December »
Updated: Feb 14, 2024 | Published by: Weather U.S. | Resources

Frequently asked questions

What is the coldest time of year in Port Arthur?

In Port Arthur, January is known for its average lowest temperatures, reaching a high of 59.5°F (15.3°C) and a low of 46.9°F (8.3°C).

How many days does it rain in Port Arthur?

Throughout the year, there are 132.6 rainfall days, and 12.09" (307mm) of precipitation is accumulated.

When it does not snow in Port Arthur?

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

How many days does it snow in Port Arthur?

Throughout the year, in Port Arthur, Texas, there are 0.5 snowfall days, and 0.04" (1mm) of snow is accumulated.

What is the most humid month in Port Arthur?

February is the most humid month in Port Arthur, Texas, with an average relative humidity of 81%.

When is Daylight Saving Time (DST) in Port Arthur?

On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Port Arthur, Texas, and the time zone changes from CST to CDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from CDT to CST.

What is the driest month in Port Arthur?

April is the month with the least rainfall. Rain falls for 8 days and accumulates 0.43" (11mm) of precipitation.

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

The months with the highest UV index in Port Arthur, Texas, are May through August, with an average maximum UV index of 7.

When are the longest days in Port Arthur?

The month with the longest days in Port Arthur is June, with an average of 14h and 0min of daylight.

What is the warmest month in Port Arthur?

August proves to be the warmest month in Port Arthur, Texas, recording an average peak temperature of 91°F (32.8°C) and a minimum temperature of 78.3°F (25.7°C).

What is the rainiest month in Port Arthur?

The month with the most rainfall in Port Arthur is August, when the rain falls for 17.9 days and typically aggregates up to 2.09" (53mm) of precipitation.

What month has the most sunshine in Port Arthur?

August has the most sunshine of the year in Port Arthur, with an average of 10.7h of sunshine.

What is the least humid month in Port Arthur?

The least humid month is October, with an average relative humidity of 71%.

When does it snow in Port Arthur?

December is the only month when snow falls.

What is the snowiest month in Port Arthur?

The month with the most snowfall is December, when snow falls for 0.1 days and typically aggregates up to 0.04" (1mm) of snow.

What is the month with the shortest days in Port Arthur?

With an average of 10h and 18min of daylight, December has the shortest days of the year in Port Arthur, Texas.

What is the month with the least sunshine in Port Arthur?

With an average of 5h of sunshine, December has the least sunshine of the year.

When is the lowest UV index in Port Arthur?

December is the month with the lowest UV index in Port Arthur, Texas, with an average maximum UV index of 3.

Average temperature
Port Arthur, TX

Average temperature - Port Arthur, TX

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).

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
Port Arthur, TX

Average pressure - Port Arthur, TX

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

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Average wind speed
Port Arthur, TX

Average wind speed - Port Arthur, TX

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
Port Arthur, TX

Average humidity - Port Arthur, TX

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
Port Arthur, TX

Average rainfall - Port Arthur, TX

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
Port Arthur, TX

Average rainfall days - Port Arthur, TX

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

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Average snowfall
Port Arthur, TX

Average snowfall - Port Arthur, TX

The month with the highest snowfall is December (0.04").
The 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
Port Arthur, TX

Average snowfall days - Port Arthur, TX

The month with the highest number of snowfall days is January (0.3 days).
The 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 / Average sunshine
Port Arthur, TX

Average daylight / Average sunshine - Port Arthur, TX

The month with the longest days is June (Average daylight: 14h and 0min).
The month with the shortest days is December (Average daylight: 10h and 18min).

The month with the most sunshine is August (Average sunshine: 10h and 42min).
The month with the least sunshine is December (Average sunshine: 5h and 0min).

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Average sunshine days
Port Arthur, TX

Average sunshine days - Port Arthur, TX

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 visibility
Port Arthur, TX

Average visibility - Port Arthur, TX

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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Port Arthur, Texas, USA

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