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Harlingen September Weather

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

Typical Harlingen September Weather 1991–2020
Average daily high	91.7 °F
Average daily low	72.9 °F
Average monthly precipitation	5.2 inches
Daily chance of precipitation	36.0%

Harlingen September Weather Records 1911–2024
Highest temperature	107 °F	September 4, 2011
Lowest temperature	52 °F	September 28, 1942
Highest daily low	84 °F	September 1, 2020
Lowest daily high	62 °F	September 28, 1970
Hottest average high temperature	98.6 °F	2023
Coldest average high temperature	86.5 °F	1975
Most daily precipitation	6.3 inches	September 12, 2018
Most monthly precipitation	17.7 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	94.6	74.6	103	67
September 2	94.4	74.5	104	63
September 3	94.2	74.4	106	60
September 4	94.0	74.4	107	64
September 5	93.9	74.3	107	64
September 6	93.7	74.3	103	59
September 7	93.5	74.1	101	59
September 8	93.3	74.0	103	59
September 9	93.2	73.9	102	63
September 10	93.0	73.8	102	63
September 11	92.8	73.6	103	65
September 12	92.6	73.5	101	64
September 13	92.4	73.4	100	62
September 14	92.2	73.2	101	62
September 15	92.0	72.9	101	62
September 16	91.8	72.7	102	62
September 17	91.6	72.5	100	62
September 18	91.5	72.3	100	60
September 19	91.3	72.1	101	59
September 20	91.2	72.0	106	59
September 21	91.2	71.8	106	59
September 22	91.1	71.7	100	56
September 23	90.9	71.4	101	54
September 24	90.7	71.2	103	55
September 25	90.6	71.0	102	55
September 26	90.5	70.8	100	58
September 27	90.3	70.6	100	53
September 28	90.2	70.4	102	52
September 29	90.1	70.2	104	53
September 30	90.0	70.0	98	52

Weather Station Details

Years	Station	Coordinates
1999–2024	Harlingen Rio Grande Airport	location
1911–1998	Harlingen	location