Port Arthur Average Temperature by Month

This page shows the average temperature in each month of the year in Port Arthur, Texas. It is based on NOAA data for the years 1991–2020.
What's the Hottest Month in Port Arthur?
In Port Arthur, Texas, the warmest month is August, with an average daily high temperature of 92.6 °F and an average low of 74.5 °F.
What's the Coldest Month in Port Arthur?
In Port Arthur, Texas, the coolest month is January, with an average daily high temperature of 63.1 °F and an average low of 43.8 °F.
Month Avg. High Avg. Low
January 63.1 °F 43.8 °F
February 66.8 °F 47.8 °F
March 72.8 °F 53.5 °F
April 78.7 °F 59.7 °F
May 85.3 °F 67.4 °F
June 90.4 °F 73.2 °F
July 92.1 °F 74.7 °F
August 92.6 °F 74.5 °F
September 89.0 °F 70.7 °F
October 81.6 °F 61.1 °F
November 71.9 °F 51.4 °F
December 64.9 °F 45.8 °F
Year 79.2 °F 60.3 °F
Weather Station Details
Years Station Coordinates
1947–2024 Jack Brooks Regional Airport location
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