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
With the onset of September, Dean's average high-temperature slightly adjusts, moderately receding from August's hot 93.7°F (34.3°C) to a still tropical 87.8°F (31°C). Dean in September experiences a low-temperature average of 67.1°F (19.5°C).Heat index
The heat index for September is evaluated at a very hot 100.4°F (38°C). More protective measures are required - heat exhaustion and heat cramps are likely. Heatstroke may follow lengthy activity.Take into consideration that the heat index values are calculated for shade and light wind conditions. Direct sunlight can potentially boost the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'real feel', determines the feeling of heat when you account for the relative humidity. The individual's experience of temperature can be shaped by numerous aspects such as metabolic variations, physical exertion, and attire. Should you be directly under the sun, anticipate a possible increase in the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are largely significant for babies and toddlers. Younglings frequently fail to recognize the requirement to rest and rehydrate. Thirst emerges late in dehydration - it is imperative to keep hydration levels high, particularly during extended physical exertions.
The evaporation of sweat is a natural cooling mechanism of the human body, facilitated by perspiration. 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. Heat-related disorders may develop if heat gain in the body overshadows its cooling capacity, leading to elevated temperatures.
Humidity
July through October, with an average relative humidity of 71%, are the least humid months in Dean.Rainfall
The month with the least rainfall is September, when the rain falls for 12.8 days and typically collects 1.77" (45mm) of precipitation.Snowfall
March through November are months without snowfall in Dean.Daylight
In September, the average length of the day in Dean is 12h and 22min.On the first day of the month, sunrise is at 6:43 am and sunset at 7:32 pm. On the last day of September, in Dean, sunrise is at 7:02 am and sunset at 6:53 pm CDT.
Sunshine
In September, the average sunshine in Dean is 9.7h.UV index
The average daily maximum UV index in September is 6. A UV Index reading of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV radiation for ordinary individuals.Note: In September, the maximum UV index of 6 suggests these recommendations:
Employ safeguards and advocate sun safety protocols. Shielding against skin and eye damage is crucial. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is at its strongest, and remember that parasols or canopies do not offer full protection. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage.
Frequently asked questions
Is it hot in Dean during September?
What is the least humid month in Dean?
What is the average humidity in September in Dean?
What is the driest month in Dean?
How much does it rain in Dean in September?
When it does not snow in Dean?
How many hours of daylight does Dean have in September?
What time are sunrise and sunset in September in Dean?
How many hours of sunshine does Dean have in September?
How high is the UV index in September in Dean?
Average temperature in September
Dean, LA
- Average high temperature in September: 87.8°F
The warmest months (with the highest average high temperature) are July and August (93.7°F).
The month with the lowest average high temperature is January (53.2°F).
- Average low temperature in September: 67.1°F
The month with the highest average low temperature is July (73°F).
The coldest month (with the lowest average low temperature) is January (37.9°F).
Average pressure in September
Dean, LA
- Average pressure in September: 29.98"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in September
Dean, LA
- Average wind speed in September: 4.8mph
The windiest month (with the highest average wind speed) is April (6.9mph).
The calmest month (with the lowest average wind speed) is August (4.7mph).
Average humidity in September
Dean, LA
- Average humidity in September: 71%
The month with the highest relative humidity is February (82%).
The months with the lowest relative humidity are July, August, September and October (71%).
Average rainfall in September
Dean, LA
- Average rainfall in September: 1.77"
The wettest month (with the highest rainfall) is April (4.25").
The driest month (with the least rainfall) is September (1.77").
Average rainfall days in September
Dean, LA
- Average rainfall days in September: 12.8 days
The month with the highest number of rainy days is August (15.1 days).
The month with the least rainy days is November (9.1 days).
Average snowfall in September
Dean, LA
- Average snowfall in September: 0"
The month with the highest snowfall is February (0.2").
The months with the least snowfall are March, April, May, June, July, August, September, October and November (0").
Average snowfall days in September
Dean, LA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (0.8 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
Dean, LA
- 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: 9h and 4min
The months with the most sunshine are July and August (Average sunshine: 10h and 30min).
The months with the least sunshine are February and December (Average sunshine: 4h and 54min).
Average sunshine days in September
Dean, LA
- Average sunshine days in September: 15.3 days
The month with the most sunshine days is October (20.2 days).
The month with the least sunshine days is February (13 days).
Average UV index in September
Dean, 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
Dean, LA
- Average cloud cover in September: 29
The month with the most cloud cover is February (Cloud cover 51).
The month with the least cloud cover is August (Cloud cover 28).
Average visibility in September
Dean, LA
- Average visibility in September: 6mi
The months with the highest visibility are April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February, March and December (5mi).
Dean, Louisiana, USA
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