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 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 arrival of September, Harahan Junction's average high-temperature registers at a still tropical 86.5°F (30.3°C), indicating a subtle variation from the previous month. An average minimum temperature of 75.2°F (24°C) is recorded during the month of September.Heat index
The heat index value for September is estimated at a fiery hot 98.6°F (37°C). Take more preventive steps, risk of heat exhaustion and heat cramps is elevated. Long activity may culminate in heatstroke.Note that heat index values are valued for light wind and location in the shade. Facing direct sunlight may hike up the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', blends air temperature and moisture content to represent the felt temperature to humans. Factors such as metabolic variations, being pregnant, and physical activity can impact an individual's weather perception. Do note, being directly under sun rays can amplify the heat you feel, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical for babies and toddlers. Youths are typically more endangered than adults since they usually sweat less. Their larger skin surface concerning their smaller bodies and higher heat production due to activity further adds to their vulnerability.
The evaporation of sweat is a natural cooling mechanism of the human body, facilitated by perspiration. With a lot of moisture in the air, the evaporation process is not as effective, and the body does not cool down as efficiently, creating a perception of overheating. Accumulating heat beyond the body's cooling measures leads to rising temperatures and potential ailments.
Humidity
In September, the average relative humidity is 74%.Rainfall
In Harahan Junction, in September, during 10.9 rainfall days, 0.43" (11mm) of precipitation is typically accumulated. Throughout the year, there are 104.1 rainfall days, and 8.39" (213mm) of precipitation is accumulated.Daylight
In September, the average length of the day is 12h and 20min.On the first day of September, sunrise is at 6:38 am and sunset at 7:22 pm. On the last day of the month, sunrise is at 6:53 am and sunset at 6:47 pm CDT.
Sunshine
In Harahan Junction, the average sunshine in September is 10.2h.UV index
The months with the highest UV index are May through September, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high health vulnerability from unsafe exposure to UV radiation for ordinary individuals.Note: The maximum daily UV index of 7 in September interprets into the following recommendations:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. Be aware that the sun's UV radiation is strongest between 10 a.m. and 4 p.m. and try to reduce direct sun exposure during this period as much as possible. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is it in September?
What is the average humidity in September?
How much does it rain in September?
What is the average length of the day in September in Harahan Junction?
What time are sunrise and sunset in September?
How many hours of sunshine does Harahan Junction have in September?
When is the highest UV index?
How high is the UV index in September?
Average temperature in September
Harahan Junction, LA
- Average high temperature in September: 86.5°F
The warmest month (with the highest average high temperature) is July (89.2°F).
The month with the lowest average high temperature is January (60.4°F).
- Average low temperature in September: 75.2°F
The month with the highest average low temperature is August (79°F).
The coldest month (with the lowest average low temperature) is January (47.8°F).
Average pressure in September
Harahan Junction, LA
- Average pressure in September: 29.97"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The months with the lowest atmospheric pressure are June, August and September (29.97"Hg).
Average wind speed in September
Harahan Junction, LA
- Average wind speed in September: 6.9mph
The windiest months (with the highest average wind speed) are February and April (9.5mph).
The calmest months (with the lowest average wind speed) are July and August (6.5mph).
Average humidity in September
Harahan Junction, LA
- Average humidity in September: 74%
The month with the highest relative humidity is December (78%).
The month with the lowest relative humidity is October (71%).
Average rainfall in September
Harahan Junction, LA
- Average rainfall in September: 0.43"
The wettest month (with the highest rainfall) is July (1.3").
The driest month (with the least rainfall) is March (0.39").
Average rainfall days in September
Harahan Junction, LA
- Average rainfall days in September: 10.9 days
The month with the highest number of rainy days is August (14.8 days).
The month with the least rainy days is November (4.5 days).
Average daylight in September /
Average sunshine in September
Harahan Junction, LA
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 0min).
The month with the shortest days is December (Average daylight: 10h and 18min).
- 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
Harahan Junction, LA
- Average sunshine days in September: 14.8 days
The month with the most sunshine days is November (24.6 days).
The month with the least sunshine days is August (10.3 days).
Average UV index in September
Harahan Junction, LA
- Average UV index in September: 7
The months with the highest UV index are May, June, July, August and September (UV index 7).
The month with the lowest UV index is December (UV index 3).
Average cloud cover in September
Harahan Junction, 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
Harahan Junction, 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).
Harahan Junction, Louisiana, USA
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