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 sea temperature 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 high-temperature average in September for Mandeville is a still tropical 87.6°F (30.9°C), staying closely aligned with August's conditions. During September, Mandeville experiences a consistent low-temperature average of 73°F (22.8°C).Heat index
The average heat index in September is evaluated at a fiery hot 102.2°F (39°C). Implement additional safety measures to avoid heat cramps and heat exhaustion. Persistent activity might trigger heatstroke.In reference to the heat index, it's for places in shade and with a slight wind. In the presence of direct sunshine, the heat index could be augmented by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'feels like', represents the fusion of temperature and moisture in the air to suggest how warm it feels. One's perception of temperature is subjective, varying based on their activity and individual heat perception, influenced by factors like wind, clothing, and metabolic variations. It is noteworthy that being in direct sunlight can enhance the weather's impact, raising the heat index by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely vital to babies and toddlers. Children often miss understanding the importance of rest and rehydration. Thirst usually appears late during dehydration - therefore, maintaining hydration, particularly during long physical activities, is essential.
The natural cooling mechanism in humans involves perspiration, where the evaporation of sweat balances out excessive warmth. Increased relative humidity interferes with body cooling by slowing the rate of evaporation, resulting in a slower body cooling rate and a heightened feeling of heat. Accumulating heat beyond the body's cooling measures leads to rising temperatures and potential ailments.
Humidity
In Mandeville, the average relative humidity in September is 75%.Rainfall
In Mandeville, during September, the rain falls for 18.9 days and regularly aggregates up to 3.74" (95mm) of precipitation. Throughout the year, there are 183.7 rainfall days, and 43.94" (1116mm) of precipitation is accumulated.Snowfall
In Mandeville, snow does not fall in February through December.Ocean temperature
In Mandeville, the average seawater temperature in September is 82.6°F (28.1°C).Note: For swimming, diving, and other water activities, temperatures between 77°F (25°C) and 84.2°F (29°C) are perceived as very enjoyable and pleasurable for prolonged periods without feeling uncomfortable.
Daylight
In September, the average length of the day is 12h and 20min.On the first day of September, sunrise is at 6:37 am and sunset at 7:22 pm. On the last day of the month, sunrise is at 6:53 am and sunset at 6:46 pm CDT.
Sunshine
In September, the average sunshine in Mandeville is 10.2h.UV index
In Mandeville, the average daily maximum UV index in September is 6. A UV Index of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV radiation for average individuals.Note: The maximum UV index of 6 during September leads to these instructions:
Stand by precautions and apply sun safety measures. Evading sunburn is of great importance. 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. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun. Beware! Reflections from sand and water can intensify the Sun's UV radiation.
Frequently asked questions
How hot is it in Mandeville in September?
What is the average humidity in September in Mandeville?
How many days does it rain in September in Mandeville?
When it does not snow in Mandeville?
What is the ocean temperature in September in Mandeville?
How many hours of daylight does Mandeville have in September?
When are sunrise and sunset in September in Mandeville?
How many hours of sunshine does Mandeville have in September?
How high is the UV index in September in Mandeville?
Average temperature in September
Mandeville, LA
- Average high temperature in September: 87.6°F
The warmest month (with the highest average high temperature) is August (91°F).
The month with the lowest average high temperature is January (59.2°F).
- Average low temperature in September: 73°F
The months with the highest average low temperature are July and August (76.8°F).
The coldest month (with the lowest average low temperature) is January (44.8°F).
Average pressure in September
Mandeville, LA
- Average pressure in September: 29.98"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The months with the lowest atmospheric pressure are June and August (29.97"Hg).
Average wind speed in September
Mandeville, LA
- Average wind speed in September: 5.6mph
The windiest month (with the highest average wind speed) is April (8mph).
The calmest month (with the lowest average wind speed) is August (5.4mph).
Average humidity in September
Mandeville, 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
Mandeville, LA
- Average rainfall in September: 3.74"
The wettest month (with the highest rainfall) is August (6.73").
The driest month (with the least rainfall) is November (1.93").
Average rainfall days in September
Mandeville, LA
- Average rainfall days in September: 18.9 days
The month with the highest number of rainy days is August (23.8 days).
The month with the least rainy days is November (8.2 days).
Average snowfall in September
Mandeville, LA
- Average snowfall in September: 0"
The month with the highest snowfall is January (0.08").
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
Mandeville, 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 sea temperature in September
Mandeville, LA
- Average sea temperature in September: 82.7°F
The best month for swimming (with the highest average sea temperature) is August (86.4°F).
The coldest month (with the lowest average sea temperature) is January (56.6°F).
Average daylight in September /
Average sunshine in September
Mandeville, 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: 11h and 0min).
The month with the least sunshine is December (Average sunshine: 5h and 6min).
Average sunshine days in September
Mandeville, LA
- Average sunshine days in September: 9.3 days
The month with the most sunshine days is November (19.8 days).
The month with the least sunshine days is August (5.6 days).
Average UV index in September
Mandeville, LA
- Average UV index in September: 6
The months with the highest UV index are May, June, July and August (UV index 7).
The month with the lowest UV index is December (UV index 3).
Average cloud cover in September
Mandeville, LA
- Average cloud cover in September: 26
The month with the most cloud cover is December (Cloud cover 46).
The month with the least cloud cover is October (Cloud cover 24).
Average visibility in September
Mandeville, 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).
Mandeville, Louisiana, USA
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