September weather forecast
Rayville, LA

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Weather in September

September, the first month of the autumn in Rayville, is still a tropical month, with temperature in the range of an average high of 87.1°F (30.6°C) and an average low of 68.2°F (20.1°C).

Temperature

As September takes its course, Rayville's average high-temperature registers at a still hot 87.1°F (30.6°C), closely aligning with the preceding month. Rayville observes an average nighttime low-temperature of 68.2°F (20.1°C) during the month of September.

Heat index

Throughout September, the heat index is computed to be a torrid 98.6°F (37°C). Ensure additional precautions, heat exhaustion and heat cramps may be expected. Heatstroke could occur from sustained activity.
It is important to note that the heat index values are for shaded areas and light wind scenarios. Exposure to unobstructed sunshine could lead to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'feels like', provides an understanding of perceived warmth by combining temperature and relative humidity. The impression of weather on a person can be swayed by additional aspects, including metabolic variations, pregnancy, and activity levels. It is noteworthy to mention that direct sunlight exposure can augment the felt temperature, leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly meaningful for babies and toddlers. Young kids are often more at risk than adults as they tend to perspire less. Besides, their skin surface is larger relative to their small bodies, and their increased heat output from their active lifestyle compounds their risk.
To prevent overheating and help regulate its internal temperature, the human body sweat and rely on the evaporation to cool down. In situations of high air temperature combined with high humidity (significant heat index), the body's ability to perspire is reduced, heightening the sense of warmth. Rising body temperatures resulting from an imbalance in heat absorption can lead to potential thermal issues.

Humidity

In September, the average relative humidity is 72%.

Rainfall

The month with the least rainfall is September, when the rain falls for 12.1 days and typically collects 1.69" (43mm) of precipitation.

Snowfall

In Rayville, snow does not fall in April through December.

Daylight

In September, the average length of the day is 12h and 22min.
On the first day of September, sunrise is at 6:42 am and sunset at 7:31 pm. On the last day of the month, sunrise is at 7:00 am and sunset at 6:52 pm CDT.

Sunshine

The average sunshine in September is 9.8h.

UV index

In Rayville, 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 rays for the average person.
Note: During September, 6 as the daily maximum UV index converts into the following advice:
Adhere to precautions and respect sun safety doctrines. Avoiding sunburn is vital. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a period when UV radiation is particularly strong, noting that parasols or canopies may not offer total sun protection. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation.
Updated: Aug 24, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

Is it hot during September?

In Rayville, 87.1°F (30.6°C) is the average high-temperature and 68.2°F (20.1°C) is the average low-temperature during September. The average heat index (a.k.a. 'real feel', 'feels like'), which calculates the temperature value influenced by the moisture in the air, in September is computed to be 98.6°F (37°C).

What is the average humidity in September?

In September, the average relative humidity is 72%.

What is the driest month?

The month with the least rainfall is September, when the rain falls for 12.1 days and typically collects 1.69" (43mm) of precipitation.

How much does it rain in September?

In Rayville, in September, it is raining for 12.1 days, with typically 1.69" (43mm) of accumulated precipitation.

When it does not snow?

In Rayville, snow does not fall in April through December.

How many hours of daylight does Rayville have in September?

In Rayville, the average day length in September is 12h and 22min.

When are sunrise and sunset in September?

In September, on the first day of the month, sunrise is at 6:42 am and sunset at 7:31 pm. On the last day of the month, sunrise is at 7:00 am and sunset at 6:52 pm CDT.

How long on average sun shines in September?

In Rayville, the average sunshine duration in September is 9.8h.

How high is the UV index in September?

The average daily maximum UV index in September is 6. A UV Index value of 6 to 7 symbolizes a high health threat from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Rayville, LA

Average temperature in September - Rayville, LA
  • Average high temperature in September: 87.1°F

The warmest month (with the highest average high temperature) is July (91.8°F).
The month with the lowest average high temperature is January (53.6°F).

  • Average low temperature in September: 68.2°F

The month with the highest average low temperature is July (73.6°F).
The coldest month (with the lowest average low temperature) is January (39.6°F).

Average pressure in September
Rayville, LA

Average pressure in September - Rayville, 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 (29.95"Hg).

Average wind speed in September
Rayville, LA

Average wind speed in September - Rayville, LA
  • Average wind speed in September: 5.5mph

The windiest month (with the highest average wind speed) is February (8.5mph).
The calmest months (with the lowest average wind speed) are August and September (5.5mph).

Average humidity in September
Rayville, LA

Average humidity in September - Rayville, LA
  • Average humidity in September: 72%

The month with the highest relative humidity is February (81%).
The month with the lowest relative humidity is October (68%).

Average rainfall in September
Rayville, LA

Average rainfall in September - Rayville, LA
  • Average rainfall in September: 1.69"

The wettest month (with the highest rainfall) is April (4.06").
The driest month (with the least rainfall) is September (1.69").

Average rainfall days in September
Rayville, LA

Average rainfall days in September - Rayville, LA
  • Average rainfall days in September: 12.1 days

The month with the highest number of rainy days is July (15.6 days).
The month with the least rainy days is November (9.3 days).

Average snowfall in September
Rayville, LA

Average snowfall in September - Rayville, LA
  • Average snowfall in September: 0"

The months with the highest snowfall are January and February (0.16").
The months with the least snowfall are April, May, June, July, August, September, October, November and December (0").

Average snowfall days in September
Rayville, LA

Average snowfall days in September - Rayville, LA
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is February (0.7 days).
The months with the least snowfall days are April, May, June, July, August, September, October and November (0 days).

Average daylight in September /
Average sunshine in September
Rayville, LA

Average daylight in September / Average sunshine in September - Rayville, 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 6min).

  • Average sunshine in September: 9h and 5min

The month with the most sunshine is June (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 4h and 48min).

Average sunshine days in September
Rayville, LA

Average sunshine days in September - Rayville, 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 July (12.8 days).

Average UV index in September
Rayville, LA

Average UV index in September - Rayville, LA
  • Average UV index in September: 6

The months with the highest UV index are 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
Rayville, LA

Average cloud cover in September - Rayville, LA
  • Average cloud cover in September: 28

The month with the most cloud cover is February (Cloud cover 49).
The months with the least cloud cover are June and October (Cloud cover 27).

Average visibility in September
Rayville, LA

Average visibility in September - Rayville, 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).

Rayville, Louisiana, USA

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