Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
The onset of September is marked by a minor decrease in temperature, transitioning from a very hot 95.5°F (35.3°C) in August to a hot 86.9°F (30.5°C). In the month of September, Slidell experiences an average low-temperature of 68.9°F (20.5°C).Heat index
For most parts of September, the heat index is appraised at a fiery hot 95°F (35°C). Ensure extra safety steps, heat exhaustion and heat cramps are likely. Long activity might lead to heatstroke.The standards for the heat index are set for locations in shade and under light breezes. The heat index might be elevated by 15 Fahrenheit (8 Celsius) degrees due to direct sun exposure.
Note: The heat index, also known as 'real feel' or 'apparent temperature', arises from combining readings of air temperature and relative moisture content. An individual's perception of weather can be swayed by a variety of elements including metabolic differences, pregnancy status, and their level of physical exertion. Understand that direct sun rays can influence the weather's impact, leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to babies and toddlers. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.
Evaporating sweat, an outcome of perspiration, is key in assisting the human body to moderate its temperature. A higher relative humidity affects normal body cooling by reducing the evaporation rate, subsequently lowering the rate at which the body cools and increasing the perception of heat. Overheating risks increase with rising body temperatures, especially if heat release isn't efficient.
Humidity
In September, the average relative humidity in Slidell is 64%.Rainfall
In Slidell, Texas, in September, during 13 rainfall days, 2.87" (73mm) of precipitation is typically accumulated. Throughout the year, there are 130.2 rainfall days, and 25.31" (643mm) of precipitation is accumulated.Snowfall
In Slidell, snow does not fall in April through October.Daylight
The average length of the day in September in Slidell is 12h and 22min.On the first day of the month, sunrise is at 7:04 am and sunset at 7:54 pm. On the last day of September, in Slidell, sunrise is at 7:23 am and sunset at 7:14 pm CDT.
Sunshine
The average sunshine in September is 8.5h.UV index
In September, the average daily maximum UV index in Slidell is 6. A UV Index value of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV radiation for ordinary individuals.Note: The maximum daily UV index, 6 in September, converts into the following recommendations:
Endorse precautions and be consistent with sun safety guidelines. Preventing sunburn is paramount. Avoid direct sunlight between the hours of 10 a.m. and 4 p.m., when UV radiation is at its peak. Keep in mind that shade structures may not provide complete protection. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is September in Slidell?
What is the average humidity in September in Slidell?
How much does it rain in Slidell in September?
When it does not snow in Slidell?
What is the average length of the day in September in Slidell?
When are sunrise and sunset in September in Slidell?
How long on average sun shines in September in Slidell?
What is the UV index reading in September in Slidell?
Average temperature in September
Slidell, TX
- Average high temperature in September: 86.9°F
The warmest month (with the highest average high temperature) is August (95.5°F).
The month with the lowest average high temperature is January (53.6°F).
- Average low temperature in September: 68.9°F
The month with the highest average low temperature is July (75°F).
The coldest month (with the lowest average low temperature) is January (37.2°F).
Average pressure in September
Slidell, TX
- Average pressure in September: 29.97"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in September
Slidell, TX
- Average wind speed in September: 6.9mph
The windiest month (with the highest average wind speed) is April (10.4mph).
The calmest month (with the lowest average wind speed) is September (6.9mph).
Average humidity in September
Slidell, TX
- Average humidity in September: 64%
The month with the highest relative humidity is May (74%).
The month with the lowest relative humidity is August (56%).
Average rainfall in September
Slidell, TX
- Average rainfall in September: 2.87"
The wettest month (with the highest rainfall) is May (2.99").
The driest month (with the least rainfall) is January (1.1").
Average rainfall days in September
Slidell, TX
- Average rainfall days in September: 13 days
The month with the highest number of rainy days is May (15.2 days).
The month with the least rainy days is January (5.9 days).
Average snowfall in September
Slidell, TX
- Average snowfall in September: 0"
The month with the highest snowfall is February (0.59").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Slidell, TX
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (1.4 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Slidell, TX
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 18min).
The month with the shortest days is December (Average daylight: 10h and 0min).
- Average sunshine in September: 8h and 3min
The month with the most sunshine is July (Average sunshine: 11h and 6min).
The month with the least sunshine is December (Average sunshine: 5h and 48min).
Average sunshine days in September
Slidell, TX
- Average sunshine days in September: 14.3 days
The month with the most sunshine days is January (23.7 days).
The month with the least sunshine days is May (13.7 days).
Average UV index in September
Slidell, TX
- Average UV index in September: 6
The months with the highest UV index are June, July and August (UV index 7).
The month with the lowest UV index is December (UV index 2).
Average cloud cover in September
Slidell, TX
- Average cloud cover in September: 28
The month with the most cloud cover is March (Cloud cover 38).
The month with the least cloud cover is August (Cloud cover 19).
Average visibility in September
Slidell, TX
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Slidell, Texas, USA
Weather forecast for your location
2. Allow the app to use your location