The best times to visit Port Arthur for ideal weather are

February 19th to May 6th

based on average temperature and humidity from NOAA (the National Oceanic and Atmospheric Administration). Read below for more weather and travel details.



Other Port Arthur Travel Info

Weather in Port Arthur


Average temperatures in Port Arthur vary greatly. Considering humidity, temperatures feel nice most of the year, excluding some hot weeks in the summer, with a chance of precipitation throughout most of the year. The area is less temperate than some — in the 30th percentile for pleasant weather — compared to tourist destinations worldwide. Weeks with ideal weather are listed above. If you’re looking for the very warmest time to visit Port Arthur, the hottest months are August, July, and then June. See average monthly temperatures below. The warmest time of year is generally early to mid August where highs are regularly around 95.7°F (35.4°C) with temperatures rarely dropping below 75.4°F (24.1°C) at night.

Port Arthur Temperatures (Fahrenheit)


Port Arthur Temperatures (Celsius)


“Feels-Like” Temperatures

The way we experience weather isn’t all about temperature. Higher temperatures affect us much more at higher humidity, and colder temperatures feel piercing with high winds. Our perceived temperatures factor in humidity and wind chill to better represent how hot or cold the day feels to a person.

Port Arthur Perceived Temperature (F)


Port Arthur Perceived Temperature (C)



Average Port Arthur Temperatures by Month

Daily highs (averaged for the month) usually give the best indication of the weather. A significantly lower mean and low generally just means it gets colder at night.

Show Fahrenheit

Month Avg. High (°F) Avg. Mean (°F) Avg. Low (°F)
Jan 64.3 51.8 40.8
Feb 67.8 55.3 44.7
Mar 74.3 62.1 51
Apr 80.3 68.9 58.1
May 86.5 75.8 66.1
Jun 92.4 81.8 72.9
Jul 93.1 82.4 73.9
Aug 94.6 83.1 74.6
Sep 90 78.8 70.1
Oct 83.5 70.4 59
Nov 74.5 61.2 49.9
Dec 68 55.7 45.1

Show Celsius

Month Avg. High (°C) Avg. Mean (°C) Avg. Low (°C)
Jan 17.9 11 4.9
Feb 19.9 12.9 7.1
Mar 23.5 16.7 10.6
Apr 26.8 20.5 14.5
May 30.3 24.3 18.9
Jun 33.6 27.7 22.7
Jul 33.9 28 23.3
Aug 34.8 28.4 23.7
Sep 32.2 26 21.2
Oct 28.6 21.3 15
Nov 23.6 16.2 9.9
Dec 20 13.2 7.3



Precipitation (Rain or Snow)

If dry weather is what you’re after, the months with the lowest chance of significant precipitation in Port Arthur are May, March, and then April. Note that we define “significant precipitation” as .1 inches or more in this section. The lowest chance of rain or snow occurs around early April. For example, on the week of April 2nd there is 1 day of precipitation on average. By contrast, it’s most likely to rain or snow in mid July with an average of 3 days of significant precipitation the week of July 16th.

When can you find snow in Port Arthur? Weather stations report no annual snow. Please note that a value of 0 for snow in the graph below may either mean there was no snow, or that snow is unreported.

Chance of Precipitation

The graph below shows the % chance of rainy and snowy days in Port Arthur.

Days with precipitation

Snow on the Ground

The graph below shows the average snow on the ground in Port Arthur (in).

Snow depth

Average Rain and Snow by Month

Show Inches

Month Daily Chance of Rain Average Snow Depth (in) Total Precipitation (in)
Jan 18% 0 4.6
Feb 19% 0 3.3
Mar 16% 0 4.1
Apr 16% 0 4.8
May 16% 0 4
Jun 22% 0 3.6
Jul 29% 0 8
Aug 22% 0 4.9
Sep 28% 0 6.8
Oct 18% 0 5
Nov 18% 0 4.4
Dec 20% 0 4.1

Show Centimeters

Month Daily Chance of Rain Average Snow Depth (cm) Total Precipitation (cm)
Jan 18 0 11.7
Feb 19 0 8.4
Mar 16 0 10.4
Apr 16 0 12.2
May 16 0 10.2
Jun 22 0 9.1
Jul 29 0 20.3
Aug 22 0 12.4
Sep 28 0 17.3
Oct 18 0 12.7
Nov 18 0 11.2
Dec 20 0 10.4


Humidity and Wind

Port Arthur has some very humid months, and above average humidity throughout the year. The least humid month is January (64.8% relative humidity), and the most humid month is July (70.6%).

Wind in Port Arthur is usually moderate. The windiest month is April, followed by February and March. April’s average wind speed of around 8.9 knots (10.3 MPH or 16.5 KPH) is considered “a gentle breeze.” Maximum sustained winds (the highest speed for the day lasting more than a few moments) are at their highest in early to mid April where average top sustained speeds reach 16.5 knots, which is considered a moderate breeze.

Relative Humidity (%)

The graph below shows the average % humidity by month in Port Arthur.

Avg. Relative Humidity


The graph below shows wind speed (max and average) in knots.

Max Sustained Wind
Average Daily Wind

Average Wind Speeds

Show Wind Speeds

All wind speeds are in knots. 1 knot = 1.15 MPH or 1.85 KPH.

Month Avg. Wind Avg. Wind Feel Sustained High Wind High Wind Feel
Jan 8 Gentle breeze 14.4 Significant breeze
Feb 8.5 Gentle breeze 15.2 Significant breeze
Mar 8.4 Gentle breeze 15.3 Significant breeze
Apr 8.9 Gentle breeze 16 Significant breeze
May 8.2 Gentle breeze 15 Significant breeze
Jun 6.3 Light breeze 13.7 Significant breeze
Jul 5 Light breeze 12.7 Significant breeze
Aug 5 Light breeze 12.2 Significant breeze
Sep 5.8 Light breeze 12.4 Significant breeze
Oct 6.5 Light breeze 12.9 Significant breeze
Nov 7.2 Gentle breeze 13.4 Significant breeze
Dec 8 Gentle breeze 14.4 Significant breeze

Show Relative Humidity by Month

Month Avg. Relative Humidity
Jan 64.8%
Feb 67%
Mar 66.3%
Apr 66%
May 66.3%
Jun 68%
Jul 70.6%
Aug 69.2%
Sep 69.9%
Oct 65.4%
Nov 66.5%
Dec 69.1%


Is it Safe to Travel to Port Arthur?

Our best data indicates this area is generally safe. As of Oct 07, 2019 there are no travel advisories or warnings for the United States; exercise normal security precautions. Check this page for any recent changes or regions to avoid: Travel Advice and Advisories. This advisory was last updated on Sep 23, 2019.


The Busiest and Least Crowded Months

The busiest month for tourism in Port Arthur, TX, US is June, followed by July and May. Prices for hotels and flights will be most expensive during these months, though you can save if you purchase well in advance. Tourists are unlikely to visit Port Arthur in December. Those willing to visit at these times will likely find it the least expensive month.

Estimated Tourism by Month


Most Popular Months to Visit

Tourists Seeking Accommodations

Tourism graph is based on Google searches for services used by tourists relative to the rest of the year. Tourism data for this area is slightly extrapolated based on nearby areas. Displayed data is calculated relative to the peak, so a score of 65.8 in December means 65.8% of the tourists vs. June.



Overall Port Arthur Travel Experience by Season

Spring (March through May)

Humidity and temperatures combine to make this season feel warm. Highs range from 90.1°F (32.3°C) and 70.7°F (21.5°C) with warmer temperatures in the later months. Rain is somewhat common with roughly 5 days of significant precipitation per month. Spring is the second busiest for tourism, which makes it a good time for those looking for things to do.

Summer (June through August)

The middle-year months have very comfortable weather with high temperatures that are quite warm. These months see the most precipitation with 7 to 9 days of precipitation per month. June – August is the busiest season for tourism in Port Arthur, so lodging and other accommodations may cost more than usual.

Fall (September through November)

Fall daily highs range from 91°F (32.8°C) and 70.1°F (21.2°C), which will feel very nice given the humidity and wind. It rains or snows a significant amount: 5 to 8 days per month. Tourism is fairly slow during these months due to the weather, so hotels may be lower priced.

Winter (December through February)

Weather is too cold this time of year in Port Arthur to be enjoyable for warm weather travelers. The average high during this season is between 71.5°F (21.9°C) and 63.1°F (17.3°C). On average, it rains or snows a fair amount: 5 to 6 times per month. These times of year are the slowest with tourists.


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