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 onset records a minor alteration in the average high-temperature to a still hot 87.3°F (30.7°C) from August's 90.7°F (32.6°C). During the month of September, the temperature generally drops to a low average of 73.4°F (23°C).Heat index
September's average heat index is estimated at a sweltering 100.4°F (38°C). Adopt additional preventive measures, heat cramps and heat exhaustion are potential outcomes. Prolonged activity may trigger heatstroke.Heat index values are typically calculated for conditions of shade and a light breeze. Direct sunlight might lead to a heat index increase by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', measures the perceived warmth when incorporating the humidity present in the air. The individual's temperature perception can be influenced by numerous factors such as metabolic variations, physical activity, and clothing. Direct sun rays can make one feel hotter, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for babies and toddlers. Children commonly overlook the importance of rest and fluid replenishment. Thirst, being a delayed sign of dehydration, emphasizes the need to keep hydration up, especially during lengthy physical activities.
Perspiring is the body's way of cooling down, particularly by allowing sweat to evaporate and take the heat with it. Excessive relative humidity disturbs the body's typical cooling process by reducing evaporation, leading to a decrease in body cooling rate and an increase in the sensation of warmth. Heat-related challenges, like dehydration, can be anticipated when body heat isn't managed effectively.
Humidity
The average relative humidity in September is 75%.Rainfall
In Pearl River, Louisiana, during September, the rain falls for 18.4 days and regularly aggregates up to 2.4" (61mm) of precipitation. Throughout the year, there are 173.3 rainfall days, and 30.79" (782mm) of precipitation is accumulated.Snowfall
In Pearl River, snow does not fall in February through December.Daylight
The average length of the day in September is 12h and 20min.On the first day of September, sunrise is at 6:36 am and sunset at 7:21 pm. On the last day of the month, sunrise is at 6:52 am and sunset at 6:45 pm CDT.
Sunshine
The average sunshine in September is 10.3h.UV index
In September, the average daily maximum UV index is 6. A UV Index value of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV rays for the ordinary person.Note: In September, an average UV index of 6 transforms into the following instructions:
Take precautions and utilize sun safety practices. Protection against skin and eye damage is required. To the best of your ability, limit your exposure to the sun between the hours of 10 a.m. and 4 p.m., when UV radiation is at its peak. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection. Attention! Nearly twice the Sun's UV radiation can be reflected by snow.
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 in Pearl River?
When it does not snow in Pearl River?
What is the average length of the day in September?
What time are sunrise and sunset in September?
How long on average sun shines in September?
How high is the UV index in September?
Average temperature in September
Pearl River, LA
- Average high temperature in September: 87.3°F
The warmest month (with the highest average high temperature) is July (90.9°F).
The month with the lowest average high temperature is January (59.4°F).
- Average low temperature in September: 73.4°F
The month with the highest average low temperature is August (77.4°F).
The coldest month (with the lowest average low temperature) is January (45.1°F).
Average pressure in September
Pearl River, 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
Pearl River, LA
- Average wind speed in September: 5.7mph
The windiest month (with the highest average wind speed) is April (8mph).
The calmest month (with the lowest average wind speed) is July (5.4mph).
Average humidity in September
Pearl River, 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 (70%).
Average rainfall in September
Pearl River, LA
- Average rainfall in September: 2.4"
The wettest month (with the highest rainfall) is August (4.92").
The driest month (with the least rainfall) is November (1.5").
Average rainfall days in September
Pearl River, LA
- Average rainfall days in September: 18.4 days
The month with the highest number of rainy days is August (23.5 days).
The month with the least rainy days is November (8 days).
Average snowfall in September
Pearl River, LA
- Average snowfall in September: 0"
The month with the highest snowfall is January (0.2").
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
Pearl River, 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
Pearl River, 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 2min
The month with the most sunshine is June (Average sunshine: 11h and 6min).
The month with the least sunshine is December (Average sunshine: 5h and 6min).
Average sunshine days in September
Pearl River, LA
- Average sunshine days in September: 8.1 days
The month with the most sunshine days is November (20.4 days).
The month with the least sunshine days is August (5.1 days).
Average UV index in September
Pearl River, 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
Pearl River, LA
- Average cloud cover in September: 25
The month with the most cloud cover is December (Cloud cover 45).
The month with the least cloud cover is October (Cloud cover 24).
Average visibility in September
Pearl River, 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).
Pearl River, Louisiana, USA
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