Slidell in september: average Weather, Temperature and Climate
Weather in Slidell in september 2025
The weather in Slidell in september comes from statistical datas on the past years. You can view the weather statistics for the whole month, but also by clicking on the tabs for the beginning, the middle and the end of the month.
Average weather throughout september
good weather UV index: 7
Weather at 6am
74°F
Clear/Sunny
47% of time
20%
20%
7%
Weather at 12pm
88°F
Clear/Sunny
45% of time
23%
22%
9%
Weather at 6pm
81°F
Clear/Sunny
49% of time
23%
18%
10%
Weather at 3am
76°F
48%
24%
17%
6%
Evolution of daily average temperature and precipitation in Slidell in september
These charts show the evolution of average minimum/maximum temperatures as well as average daily precipitation volume in Slidell in september.
The climate of Slidell in september is good
The climate in september in Slidell is wet (with 7.5in of rainfall over 11 days). The weather is better from the previous month since in august it receives an average of 11.6in of rainfall over 16 days.
The climate pleasant here this month. The high seasonal norm is 88°F. In the morning the temperature drops to 74°F. Thus, the mean temperature average in september in Slidell is 81°F. Note that these seasonal averages are in contrast with those observed in Slidell in september with a maximum record of 97°F in 2015 and a minimum record of 56°F in 2021. You can expect to have about 21 days with temperatures above 86°F, or 70 of time.
On this month of september, day length in Slidell is generally 12:20. Sunrise is at 05:44 and sunset is at 18:04.
With good weather conditions, september is a good time to go there in Louisiana.
Seasonal average climate and temperature of Slidell in september
Check below seasonal norms These statistics are generated from the weather statements of the last years of the month of september.
| September | |||||
| Outside temperature | |||||
| Average temperature | 81°F | ||||
| Highest temperature | 88°F | ||||
| Lowest temperature | 74°F | ||||
| Highest record temperature | 97°F (2015) | ||||
| Lowest record temperature | 56°F (2021) | ||||
| Number of days at +86°F | 21 day(s) (70%) | ||||
| Number of days at +65°F | 30 day(s) (100%) | ||||
| Sea temperature | |||||
| Average sea temperature | 83°F | ||||
| Lowest sea temperature | 79°F | ||||
| Highest sea temperature | 87°F | ||||
| Wind | |||||
| Wind speed | 13km/h | ||||
| Wind temperature | 74°F | ||||
| Precipitation (rainfall) | |||||
| Rainfall | 7.5in | ||||
| Number of days with rainfall | 11 day(s) (35%) | ||||
| Record daily rainfall | 10.6in (2020) | ||||
| Other climate data | |||||
| Humidity | 87% | ||||
| Visibility | 9.38km | ||||
| Cloud cover | 26% | ||||
| UV index | 7 | ||||
| Daily sunshine hours | 12 | ||||
| Sunrise and sunset | |||||
| Time of sunrise | 05:44 | ||||
| Time of sunset | 18:04 | ||||
| Length of day | 12:20 | ||||
| Our opinion about the weather in september | |||||
| Our opinion at whereandwhen.net | good | ||||
How was the weather last september?
Here is the day by day recorded weather in Slidell in september 2024:
72°F to 86°F
74°F to 92°F
76°F to 92°F
76°F to 85°F
74°F to 76°F
74°F to 79°F
68°F to 77°F
68°F to 86°F
67°F to 85°F
72°F to 79°F
72°F to 76°F
72°F to 76°F
67°F to 86°F
68°F to 86°F
68°F to 86°F
74°F to 85°F
76°F to 85°F
74°F to 86°F
74°F to 88°F
74°F to 90°F
76°F to 90°F
74°F to 88°F
74°F to 90°F
72°F to 88°F
72°F to 90°F
70°F to 83°F
67°F to 83°F
72°F to 88°F
70°F to 90°F
72°F to 85°F
Map: other cities in Louisiana in september
Cities near Slidell:
| New Orleans in september | good weather |
| Port Sulphur in september | good weather |
| Grand Isle in september | good weather |
| Houma in september | good weather |
| Baton Rouge in september | good weather |
| Morgan City in september | good weather |
| New Iberia in september | good weather |
| Marsh Island in september | good weather |
| Opelousas in september | good weather |
| Marksville in september | good weather |
| Pecan Island in september | good weather |
| Alexandria (Louisiane) in september | good weather |
Click over cities on the map for information about the weather in september.
Slidell
perfect weather
good
tolerable
bad
very bad
Weather data for Slidell in september:
Weather data for Slidell for september are derived from an average of the weather forecast since 2009 in Slidell. There is a margin of error and these forecasts are to be considered as general information only. The weather in Slidell can vary slightly from year to year, but this data should limit surprises. So you can pack your bags or check for the best time in year to go to Slidell.