September weather forecast
Rost, LA

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Weather in September

The first month of the autumn, September, is still a hot month in Rost, Louisiana, with temperature in the range of an average low of 74.1°F (23.4°C) and an average high of 86.5°F (30.3°C).

Temperature

Rost's average high-temperature in September sits at a still tropical 86.5°F (30.3°C), showing little difference from the previous month. In the month of September, the temperature generally rests at an average low of 74.1°F (23.4°C).

Heat index

For most parts of September, the heat index is appraised at a very hot 98.6°F (37°C). Heightened safety actions are necessary, heat cramps and heat exhaustion are probable. Persistent activity may lead to heatstroke.
In terms of the heat index, values are set with light wind and shade conditions in mind. The heat index may experience an enhancement of 15 Fahrenheit (8 Celsius) degrees under direct sunlight.
Note: The heat index, also known as 'felt air temperature' or 'real feel', reflects the feeling of heat when considering both air temperature and humidity. The individual's impression of temperature can be shaped by additional aspects such as metabolic variations, physical activity, and clothing. Awareness of direct sun exposure is crucial as it has the potential to heighten the weather's effects, pushing up the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly important for children. Kids are generally in more danger than adults because they perspire less. Their large skin surface area compared to their small bodies and the excessive heat due to their actions raises their risk.
The human body normally cools itself by perspiration, as evaporated sweat carries heat away from the body. With an abundance of moisture present in the air, the process of evaporation becomes less effective, and the body fails to cool down as it should, leading to the sensation of overheating. When heat surpasses the body's release mechanisms, dehydration and overheating risks become pronounced.

Humidity

The average relative humidity in September is 76%.

Rainfall

In Rost, in September, it is raining for 19.9 days, with typically 2.83" (72mm) of accumulated precipitation. Throughout the year, there are 180.8 rainfall days, and 33.39" (848mm) of precipitation is accumulated.

Snowfall

In Rost, snow does not fall in February through November.

Daylight

In September, the average length of the day is 12h and 20min.
On the first day of the month, sunrise is at 6:38 am and sunset at 7:23 pm. On the last day of September, sunrise is at 6:54 am and sunset at 6:47 pm CDT.

Sunshine

In Rost, the average sunshine in September is 10.2h.

UV index

The average daily maximum UV index in September is 6. A UV Index value of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV rays for ordinary individuals.
Note: An average UV index of 6 in September transforms into this advice:
Dodge overexposure. Fair-skinned people can get singed in less than 20 minutes. Avoid direct Sun exposure and stay in the shade between 10 a.m. and 4 p.m., a time when UV radiation is most intense, noting that not all shade structures offer full protection. Experience reduced UV exposure by about half when donning a wide-brim hat.

Frequently asked questions

Is it hot during September?

In Rost, in September, the average high-temperature is 86.5°F (30.3°C), and the average low-temperature is 74.1°F (23.4°C). In September, the average heat index (a.k.a. 'feels like', 'felt air temperature'), which combines relative humidity and air temperature, is appraised at 98.6°F (37°C).

What is the average humidity in September?

In September, the average relative humidity is 76%.

How much does it rain in September?

In Rost, during September, the rain falls for 19.9 days and regularly aggregates up to 2.83" (72mm) of precipitation.

When it does not snow?

February through November are months without snowfall.

How many hours of daylight does Rost have in September?

In Rost, the average day length in September is 12h and 20min.

When is the sunrise / sunset in September?

In September, on the first day of the month, sunrise is at 6:38 am and sunset at 7:23 pm. On the last day of the month, sunrise is at 6:54 am and sunset at 6:47 pm CDT.

How many hours of sunshine does Rost have in September?

In September, the average sunshine duration is 10.2h.

What is the UV index reading in September in Rost?

In Rost, the average daily maximum UV index in September is 6. A UV Index estimate of 6 to 7 represents a high health threat from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Rost, LA

Average temperature in September - Rost, LA
  • Average high temperature in September: 86.5°F

The warmest month (with the highest average high temperature) is July (89.6°F).
The month with the lowest average high temperature is January (60.4°F).

  • Average low temperature in September: 74.1°F

The month with the highest average low temperature is August (77.5°F).
The coldest month (with the lowest average low temperature) is January (47.3°F).

Average pressure in September
Rost, LA

Average pressure in September - Rost, 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
Rost, LA

Average wind speed in September - Rost, LA
  • Average wind speed in September: 6.2mph

The windiest months (with the highest average wind speed) are February and April (8.8mph).
The calmest months (with the lowest average wind speed) are July and August (5.8mph).

Average humidity in September
Rost, LA

Average humidity in September - Rost, LA
  • Average humidity in September: 76%

The months with the highest relative humidity are February and December (78%).
The month with the lowest relative humidity is October (72%).

Average rainfall in September
Rost, LA

Average rainfall in September - Rost, LA
  • Average rainfall in September: 2.83"

The wettest month (with the highest rainfall) is July (5.39").
The driest month (with the least rainfall) is November (1.5").

Average rainfall days in September
Rost, LA

Average rainfall days in September - Rost, LA
  • Average rainfall days in September: 19.9 days

The month with the highest number of rainy days is August (23.7 days).
The month with the least rainy days is November (8.4 days).

Average snowfall days in September
Rost, LA

Average snowfall days in September - Rost, 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 daylight in September /
Average sunshine in September
Rost, LA

Average daylight in September / Average sunshine in September - Rost, 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: 10h and 54min).
The month with the least sunshine is December (Average sunshine: 5h and 6min).

Average sunshine days in September
Rost, LA

Average sunshine days in September - Rost, LA
  • Average sunshine days in September: 7.9 days

The month with the most sunshine days is November (20.2 days).
The month with the least sunshine days is August (4.8 days).

Average UV index in September
Rost, LA

Average UV index in September - Rost, 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
Rost, LA

Average cloud cover in September - Rost, 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
Rost, LA

Average visibility in September - Rost, 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).

Rost, Louisiana, USA

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