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Slidell September Weather

Averages and records for weather in Slidell, Louisiana in the month of September.

Typical Slidell September Weather 1991–2020
Average daily high	87.1 °F
Average daily low	69.6 °F
Average monthly precipitation	4.9 inches
Average monthly snow	none
Daily chance of precipitation	32.2%
Daily chance of snow	0%

Slidell September Weather Records 1956–2024
Highest temperature	99 °F	September 2, 1989
Lowest temperature	42 °F	September 30, 1967
Highest daily low	81 °F	September 13, 2008
Lowest daily high	67 °F	September 27, 2000
Hottest average high temperature	91.7 °F	1972
Coldest average high temperature	83.5 °F	1975
Most daily precipitation	6.8 inches	September 26, 2002
Most monthly precipitation	16.6 inches	1998
Most daily snow	none	-
Most monthly snow	none	-

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	89.2	72.2	96	63
September 2	89.1	72.1	99	60
September 3	89.0	72.0	97	64
September 4	88.9	71.9	97	60
September 5	88.8	71.7	98	58
September 6	88.7	71.6	95	58
September 7	88.6	71.5	95	55
September 8	88.4	71.4	95	58
September 9	88.3	71.2	96	58
September 10	88.2	71.1	99	58
September 11	88.0	70.9	99	55
September 12	87.8	70.7	98	55
September 13	87.6	70.4	94	56
September 14	87.4	70.2	95	55
September 15	87.3	69.9	96	59
September 16	87.1	69.6	95	56
September 17	86.9	69.2	95	56
September 18	86.8	68.9	95	54
September 19	86.6	68.6	96	49
September 20	86.4	68.3	96	50
September 21	86.2	68.1	96	52
September 22	86.1	67.8	95	46
September 23	85.9	67.6	95	46
September 24	85.7	67.3	93	49
September 25	85.4	67.0	93	49
September 26	85.1	66.7	93	47
September 27	84.9	66.4	93	47
September 28	84.7	66.1	92	47
September 29	84.4	65.9	93	42
September 30	84.2	65.5	93	42

Weather Station Details

Years	Station	Coordinates
1956–2024	Slidell	location