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 unfolding of September shows an average high-temperature of a still tropical 87.8°F (31°C), indicating a slight variance from August's 91.6°F (33.1°C). Throughout September nights, Saint Francisville experiences a consistent temperature average of 68.9°F (20.5°C).Heat index
For September, the heat index is calculated to be a blisteringly hot 105.8°F (41°C). Apply extra caution, heat cramps and heat exhaustion could happen. Heatstroke might occur with long-duration activity.It is noted that heat index values are ascertained for locations in the shade and with gentle breezes. Heat index values can rise by 15 Fahrenheit (8 Celsius) degrees when in direct sunlight.
Note: The heat index, also known as 'apparent temperature' or 'real feel', is derived by integrating air temperature with the existing relative humidity to express the perceived warmth. This effect tends to be personal, with the weather perception differing among individuals due to variations in body mass, height, and exertion. Be aware that direct exposure to sunlight increases heat impact and may raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly important for children. Typically, young kids are at a higher risk than adults since they sweat less. Also, the larger skin surface in proportion to their small bodies and the heightened heat production due to their active nature adds to their vulnerability.
The human body has a built-in cooling mechanism through perspiration; evaporating sweat dissipates the excess heat. In the presence of elevated relative humidity, the evaporation rate decreases. This reduction leads to increased body heat retention compared to conditions of dry air. Overheating and potential dehydration arise when body heat gain eclipses its release capability.
Humidity
In September, the average relative humidity is 79%.Rainfall
In Saint Francisville, during September, the rain falls for 14.7 days and regularly aggregates up to 2.32" (59mm) of precipitation. Throughout the year, there are 173 rainfall days, and 35.79" (909mm) of precipitation is accumulated.Snowfall
In Saint Francisville, Louisiana, snow does not fall in February through November.Daylight
In Saint Francisville, the average length of the day in September is 12h and 20min.On the first day of the month, sunrise is at 6:42 am and sunset at 7:28 pm. On the last day of September, sunrise is at 6:58 am and sunset at 6:51 pm CDT.
Sunshine
In September, the average sunshine in Saint Francisville is 9.4h.UV index
In Saint Francisville, Louisiana, the average daily maximum UV index in September is 6. A UV Index of 6 to 7 symbolizes a high health vulnerability from unprotected exposure to Sun's UV rays for the average person.Note: In September, the UV index of 6 transforms into the following advice:
Take precautions and utilize sun safety practices. Protection against skin and eye damage is required. Seek shade and limit direct sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation. Keep in mind that shade structures like parasols or canopies do not offer complete sun protection. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear.
Frequently asked questions
Is it hot in Saint Francisville during September?
What is the average humidity in September in Saint Francisville?
How many days does it rain in September in Saint Francisville?
When it does not snow in Saint Francisville?
How many hours of daylight does Saint Francisville have in September?
When are sunrise and sunset in September in Saint Francisville?
How long on average sun shines in September in Saint Francisville?
What is the UV index intensity in September in Saint Francisville?
Average temperature in September
Saint Francisville, LA
- Average high temperature in September: 87.8°F
The warmest month (with the highest average high temperature) is August (91.6°F).
The month with the lowest average high temperature is January (57.4°F).
- Average low temperature in September: 68.9°F
The month with the highest average low temperature is August (73°F).
The coldest month (with the lowest average low temperature) is January (41.7°F).
Average pressure in September
Saint Francisville, LA
- Average pressure in September: 29.98"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The months with the lowest atmospheric pressure are June and August (29.96"Hg).
Average wind speed in September
Saint Francisville, LA
- Average wind speed in September: 4.5mph
The windiest month (with the highest average wind speed) is February (6.8mph).
The calmest month (with the lowest average wind speed) is July (4.2mph).
Average humidity in September
Saint Francisville, LA
- Average humidity in September: 79%
The month with the highest relative humidity is February (83%).
The month with the lowest relative humidity is October (72%).
Average rainfall in September
Saint Francisville, LA
- Average rainfall in September: 2.32"
The wettest month (with the highest rainfall) is August (3.66").
The driest month (with the least rainfall) is November (2.2").
Average rainfall days in September
Saint Francisville, LA
- Average rainfall days in September: 14.7 days
The month with the highest number of rainy days is August (19.4 days).
The month with the least rainy days is November (9.3 days).
Average snowfall in September
Saint Francisville, LA
- Average snowfall in September: 0"
The month with the highest snowfall is January (0.24").
The months with the least snowfall are February, March, April, May, June, July, August, September, October and November (0").
Average snowfall days in September
Saint Francisville, LA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (0.3 days).
The months with the least snowfall days are April, May, June, July, August, September, October and November (0 days).
Average daylight in September /
Average sunshine in September
Saint Francisville, 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: 9h and 2min
The month with the most sunshine is June (Average sunshine: 10h and 18min).
The month with the least sunshine is December (Average sunshine: 4h and 54min).
Average sunshine days in September
Saint Francisville, LA
- Average sunshine days in September: 12.9 days
The month with the most sunshine days is October (19.8 days).
The month with the least sunshine days is August (9.9 days).
Average UV index in September
Saint Francisville, LA
- Average UV index in September: 6
The months with the highest UV index are June and July (UV index 7).
The months with the lowest UV index are January and December (UV index 3).
Average cloud cover in September
Saint Francisville, LA
- Average cloud cover in September: 34
The month with the most cloud cover is February (Cloud cover 50).
The month with the least cloud cover is October (Cloud cover 30).
Average visibility in September
Saint Francisville, LA
- Average visibility in September: 5mi
The months with the highest visibility are October and November (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September and December (5mi).
Saint Francisville, Louisiana, USA
Weather forecast for your location
2. Allow the app to use your location
