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
September's advent denotes a minor fluctuation in the average high-temperature to a still hot 86.9°F (30.5°C) from August's 89.6°F (32°C). In the month of September, Garyville records a consistent average low-temperature of 72.5°F (22.5°C).Heat index
In September, the heat index is appraised at a very hot 102.2°F (39°C). Implement more safety precautions, heat cramps and heat exhaustion may happen. Persistent activity could induce heatstroke.Given the heat index, its values are aligned with shaded sites and gentle winds. Heat index values may surge by up to 15 Fahrenheit (8 Celsius) degrees in the presence of direct sunlight.
Note: The heat index, also known as 'feels like' or 'apparent temperature', is what the temperature feels like to the human body when the air temperature is combined with the relative humidity. Physical activity, clothing, and metabolic variations are additional factors that impact an individual's perception of temperature. Direct sunlight exposure should be noted as it has the potential to increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are primarily vital for children. Kids are generally in more danger than adults because they perspire less. Their large skin surface area compared to their small bodies and the excessive heat due to their actions raises their risk.
Humans rely on perspiration as a cooling mechanism, wherein the evaporating sweat counteracts excessive warmth. During high air temperature and humidity (high heat index), the process of perspiration is hindered, intensifying the sensation of heat. Heat disorders may be on the horizon when body temperatures rise from inadequate heat management.
Humidity
The average relative humidity in September is 78%.Rainfall
In Garyville, during September, the rain falls for 18.3 days and regularly aggregates up to 2.76" (70mm) of precipitation. In Garyville, during the entire year, the rain falls for 174 days and collects up to 34.76" (883mm) of precipitation.Snowfall
February through December are months without snowfall.Daylight
In Garyville, the average length of the day in September is 12h and 20min.On the first day of the month, sunrise is at 6:39 am and sunset at 7:24 pm. On the last day of September, sunrise is at 6:55 am and sunset at 6:48 pm CDT.
Sunshine
The average sunshine in September is 10.1h.UV index
The average daily maximum UV index in September is 6. A UV Index estimate of 6 to 7 represents a high health risk from exposure to the Sun's UV radiation for the ordinary person.Note: The maximum daily UV index, 6 in September, converts into the following recommendations:
Deter overexposure. Protecting against the sun's effects is essential. Between 10 a.m. and 4 p.m., the Sun's UV radiation is at its peak. Limit your exposure to direct sunlight during these hours. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot does it get in September?
What is the average humidity in September?
How many days does it rain in September?
When it does not snow?
What is the average length of the day in September?
When is the sunrise / sunset in September?
How many hours of sunshine does Garyville have in September?
How high is the UV index in September?
Average temperature in September
Garyville, LA
- Average high temperature in September: 86.9°F
The warmest month (with the highest average high temperature) is July (90°F).
The month with the lowest average high temperature is January (60.4°F).
- Average low temperature in September: 72.5°F
The months with the highest average low temperature are July and August (75.7°F).
The coldest month (with the lowest average low temperature) is January (46°F).
Average pressure in September
Garyville, LA
- Average pressure in September: 29.97"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The months with the lowest atmospheric pressure are June, August and September (29.97"Hg).
Average wind speed in September
Garyville, LA
- Average wind speed in September: 5.7mph
The windiest months (with the highest average wind speed) are January, February and April (8mph).
The calmest month (with the lowest average wind speed) is July (5.2mph).
Average humidity in September
Garyville, LA
- Average humidity in September: 78%
The months with the highest relative humidity are February and December (79%).
The month with the lowest relative humidity is October (73%).
Average rainfall in September
Garyville, LA
- Average rainfall in September: 2.76"
The wettest month (with the highest rainfall) is July (5.55").
The driest month (with the least rainfall) is November (1.5").
Average rainfall days in September
Garyville, LA
- Average rainfall days in September: 18.3 days
The month with the highest number of rainy days is July (23.3 days).
The month with the least rainy days is November (7.7 days).
Average snowfall in September
Garyville, LA
- Average snowfall in September: 0"
The month with the highest snowfall is January (0.04").
The months with the least snowfall are February, March, April, May, June, July, August, September, October, November and December (0").
Average snowfall days in September
Garyville, LA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (0.2 days).
The months with the least snowfall days are February, March, April, May, June, July, August, September, October and November (0 days).
Average daylight in September /
Average sunshine in September
Garyville, LA
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 6min).
The month with the shortest days is December (Average daylight: 10h and 12min).
- Average sunshine in September: 10h and 1min
The month with the most sunshine is June (Average sunshine: 10h and 36min).
The month with the least sunshine is December (Average sunshine: 5h and 0min).
Average sunshine days in September
Garyville, LA
- Average sunshine days in September: 8.7 days
The month with the most sunshine days is November (20.3 days).
The month with the least sunshine days is July (6 days).
Average UV index in September
Garyville, LA
- 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 3).
Average cloud cover in September
Garyville, LA
- Average cloud cover in September: 27
The month with the most cloud cover is December (Cloud cover 47).
The month with the least cloud cover is October (Cloud cover 25).
Average visibility in September
Garyville, LA
- 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).
Garyville, Louisiana, USA
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