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Port Arthur September Weather

Averages and records for weather in Port Arthur, Texas in the month of September.

Typical Port Arthur September Weather 1991–2020
Average daily high	89.0 °F
Average daily low	70.7 °F
Average monthly precipitation	6.7 inches
Daily chance of precipitation	29.8%

Port Arthur September Weather Records 1947–2024
Highest temperature	105 °F	September 4, 2000
Lowest temperature	45 °F	September 29, 1967
Highest daily low	82 °F	September 12, 1978
Lowest daily high	68 °F	September 30, 1985
Hottest average high temperature	95.7 °F	2023
Coldest average high temperature	83.7 °F	1957
Most daily precipitation	12.1 inches	September 17, 1963
Most monthly precipitation	23.2 inches	2019

Note: Daily averages are a moving average which includes 14 days before and after

Day	Average (°F)		Record (°F)
Day	High	Low	High	Low
September 1	91.2	73.4	102	65
September 2	91.1	73.3	104	64
September 3	90.9	73.2	103	61
September 4	90.8	73.0	105	55
September 5	90.7	72.9	104	57
September 6	90.6	72.8	101	57
September 7	90.5	72.6	102	57
September 8	90.3	72.5	103	58
September 9	90.1	72.3	97	60
September 10	89.9	72.1	100	62
September 11	89.7	71.9	97	62
September 12	89.6	71.7	98	58
September 13	89.4	71.4	98	58
September 14	89.3	71.2	97	58
September 15	89.1	70.9	96	60
September 16	88.9	70.6	99	56
September 17	88.7	70.2	98	54
September 18	88.6	70.0	97	53
September 19	88.4	69.7	96	51
September 20	88.3	69.4	99	52
September 21	88.1	69.2	101	57
September 22	87.9	69.0	100	53
September 23	87.7	68.7	96	52
September 24	87.4	68.4	94	52
September 25	87.1	68.1	94	51
September 26	86.9	67.8	94	49
September 27	86.6	67.5	94	52
September 28	86.5	67.2	96	50
September 29	86.2	66.9	95	45
September 30	86.0	66.5	95	49

Weather Station Details

Years	Station	Coordinates
1947–2024	Jack Brooks Regional Airport	location