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 advent of September sees the average high-temperature at a still hot 88.3°F (31.3°C), subtly shifted from August's 91.9°F (33.3°C). In September, Folsom experiences an average nighttime temperature of 71.4°F (21.9°C).Heat index
For September, the heat index is estimated at a blistering 104°F (40°C). Heightened precautions are necessary, heat cramps and heat exhaustion are potential risks. Continuous activity could lead to heatstroke.It is essential to grasp that the heat index's numbers are for shade and light wind settings. A direct sunlight exposure may boost the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', determines the feeling of heat when you account for the relative humidity. Factors including metabolic differences, physical activity, and clothing are additional elements that influence the individual's temperature experience. You should know that direct sun exposure can heighten weather effects, potentially elevating the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold great significance to children. Kids are usually more vulnerable than adults, given their lesser sweating ability. Along with their larger skin surface relative to their small stature and the excess heat due to their activity, their risk is amplified.
Evaporation of sweat is the main factor behind the cooling effect of perspiration in the human body. With high air temperature and humidity (high heat index) conditions, sweat production is restricted, leading to an amplified perception of heat. Rising body temperatures due to excess heat retention could signify impending heat disorders.
Humidity
In Folsom, the average relative humidity in September is 75%.Rainfall
In Folsom, during September, the rain falls for 17 days and regularly aggregates up to 2.52" (64mm) of precipitation. Throughout the year, there are 168.3 rainfall days, and 30.63" (778mm) of precipitation is accumulated.Snowfall
In Folsom, snow does not fall in February through November.Daylight
The average length of the day in September is 12h and 20min.On the first day of September, sunrise is at 6:37 am and sunset at 7:23 pm. On the last day of the month, sunrise is at 6:54 am and sunset at 6:46 pm CDT.
Sunshine
In Folsom, Louisiana, the average sunshine in September is 9.8h.UV index
In September, the average daily maximum UV index is 6. A UV Index reading of 6 to 7 represents a high health risk from unprotected exposure to Sun's UV rays for the ordinary person.Note: In September, the maximum UV index of 6 transforms into these recommendations:
Deter overexposure. Protecting against the sun's effects is essential. Attempt to stay under shade and limit exposure to the Sun between 10 a.m. and 4 p.m., when UV radiation is at its peak. Remember, devices such as parasols or canopies might not provide complete sun protection. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes. Notice! The UV radiation of the Sun can be intensified nearly twofold due to the reflective quality of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is September?
What is the average humidity in September?
How many days does it rain in September in Folsom?
When it does not snow?
How many hours of daylight does Folsom have in September?
What time are sunrise and sunset in September?
How long on average sun shines in September?
What is the UV index reading in September?
Average temperature in September
Folsom, LA
- Average high temperature in September: 88.3°F
The warmest months (with the highest average high temperature) are July and August (91.9°F).
The month with the lowest average high temperature is January (59.4°F).
- Average low temperature in September: 71.4°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 (43.3°F).
Average pressure in September
Folsom, 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 (29.97"Hg).
Average wind speed in September
Folsom, LA
- Average wind speed in September: 5mph
The windiest month (with the highest average wind speed) is April (7mph).
The calmest months (with the lowest average wind speed) are July and August (4.7mph).
Average humidity in September
Folsom, LA
- Average humidity in September: 75%
The month with the highest relative humidity is December (79%).
The month with the lowest relative humidity is October (71%).
Average rainfall in September
Folsom, LA
- Average rainfall in September: 2.52"
The wettest month (with the highest rainfall) is August (4.76").
The driest month (with the least rainfall) is November (1.3").
Average rainfall days in September
Folsom, LA
- Average rainfall days in September: 17 days
The month with the highest number of rainy days is August (21.9 days).
The month with the least rainy days is November (8.1 days).
Average snowfall in September
Folsom, LA
- Average snowfall in September: 0"
The month with the highest snowfall is January (0.31").
The months with the least snowfall are February, March, April, May, June, July, August, September, October and November (0").
Average snowfall days in September
Folsom, LA
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is January (0.3 days).
The months with the least snowfall days are February, March, April, May, June, July, August, October and November (0 days).
Average daylight in September /
Average sunshine in September
Folsom, 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 5min
The month with the most sunshine is June (Average sunshine: 10h and 42min).
The month with the least sunshine is December (Average sunshine: 4h and 54min).
Average sunshine days in September
Folsom, LA
- Average sunshine days in September: 10 days
The month with the most sunshine days is November (20.5 days).
The month with the least sunshine days is August (6.5 days).
Average UV index in September
Folsom, LA
- Average UV index in September: 6
The months with the highest UV index are May, June, July and August (UV index 7).
The months with the lowest UV index are January and December (UV index 3).
Average cloud cover in September
Folsom, LA
- Average cloud cover in September: 29
The month with the most cloud cover is December (Cloud cover 49).
The month with the least cloud cover is October (Cloud cover 27).
Average visibility in September
Folsom, 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).
Folsom, Louisiana, USA
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