Port Arthur Average Rainfall by Month

This page shows the average precipitation in each month of the year in Port Arthur, Texas. It is based on NOAA data for the years 1991–2020.
What's the Rainiest Month in Port Arthur?
In Port Arthur, August has the greatest precipitation of any month. On average, Port Arthur gets 6.9 inches of precipitation in August.
However, July is the month with the greatest chance of precipitation. 38.0% of days in July will have at least some rain.
What's the Driest Month in Port Arthur?
In Port Arthur, February has the least precipitation of any month. On average, Port Arthur gets 3.09 inches of precipitation in February.
May is the month with the lowest chance of precipitation. 23.2% of days in May will have measurable rain.
Month Precipitation % Chance
January 5.32 in 30.9
February 3.09 in 30.1
March 3.62 in 24.5
April 3.92 in 24.1
May 4.70 in 23.2
June 6.69 in 35.7
July 6.74 in 38.0
August 6.88 in 36.3
September 6.67 in 29.8
October 5.47 in 24.3
November 3.89 in 25.3
December 4.98 in 31.2
Year 61.97 in 29.5
Weather Station Details
Years Station Coordinates
1947–2024 Jack Brooks Regional Airport location
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