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Brownsville September Weather

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

Typical Brownsville September Weather 1991–2020
Average daily high	91.0 °F
Average daily low	73.7 °F
Average monthly precipitation	5.7 inches
Daily chance of precipitation	37.0%

Brownsville September Weather Records 1898–2024
Highest temperature	105 °F	September 5, 2000
Lowest temperature	51 °F	September 29, 1909
Highest daily low	83 °F	September 5, 2023
Lowest daily high	66 °F	September 20, 1991
Hottest average high temperature	98.8 °F	2023
Coldest average high temperature	84.7 °F	1967
Most daily precipitation	12.1 inches	September 20, 1967
Most monthly precipitation	20.2 inches	1984

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	93.3	75.7	100	67
September 2	93.2	75.6	99	70
September 3	93.0	75.5	102	63
September 4	92.9	75.5	103	66
September 5	92.8	75.4	105	63
September 6	92.7	75.3	100	60
September 7	92.5	75.1	99	61
September 8	92.4	75.0	102	60
September 9	92.2	74.8	101	63
September 10	92.0	74.7	102	64
September 11	91.8	74.6	100	67
September 12	91.7	74.4	100	65
September 13	91.5	74.3	100	64
September 14	91.3	74.1	101	63
September 15	91.1	73.8	100	64
September 16	90.9	73.6	99	64
September 17	90.8	73.5	98	64
September 18	90.7	73.3	98	59
September 19	90.5	73.1	98	58
September 20	90.4	73.0	99	61
September 21	90.3	72.8	99	59
September 22	90.2	72.7	99	55
September 23	90.0	72.5	102	57
September 24	89.8	72.2	104	56
September 25	89.6	72.0	98	58
September 26	89.4	71.9	98	58
September 27	89.3	71.7	99	58
September 28	89.2	71.5	100	56
September 29	89.1	71.3	98	51
September 30	89.0	71.1	97	54

Weather Station Details

Years	Station	Coordinates
1898–2024	Brownsville	location