September weather forecast
Biloxi, MS

A tall and white iconic landmark of a lighthouse and other houses in this scenic field of clean lawns in Biloxi, Mississippi
A tall and white iconic landmark of a lighthouse and other houses in this scenic field of clean lawns in Biloxi, Mississippi

Weather in September

The first month of the autumn, September, is still a hot month in Biloxi, Mississippi, with average temperature varying between 86.7°F (30.4°C) and 74.3°F (23.5°C).

Temperature

In September, the average high-temperature is essentially the same as in August - a still hot 86.7°F (30.4°C). The average low-temperature, in Biloxi, is 74.3°F (23.5°C).

Heat index

In September, the average heat index is evaluated at a very hot 98.8°F (37.1°C). Take special precautions - heat exhaustion and heat cramps are expected. Heatstroke may occur with lengthy activity.
Take into consideration that the heat index values are calculated for shade and light wind conditions. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature', 'apparent temperature', 'real feel', or 'feels like', combines air temperature and relative humidity to represent a human perceived temperature equivalent. This effect is individual, with diverse people perceiving weather differently for numerous reasons (pregnancy, wind, clothing), and activity. Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it is vital to remain hydrated, particularly during prolonged physical activities.
To prevent overheating and help regulate its internal temperature, the human body sweat and rely on the evaporation to cool down. High relative humidity reduces the evaporation rate, resulting in a lower heat removal rate from the body, causing the perception of being overheated. When heat gain surpasses the level the body can shed, body temperature begins to increase, and consequently, overheating and dehydration can occur, with varying severity.

Humidity

In Biloxi, the average relative humidity in September is 74%.

Rainfall

In September, the rain falls for 19.2 days. Throughout September, 3.86" (98mm) of precipitation is accumulated. In Biloxi, Mississippi, during the entire year, the rain falls for 179.4 days and collects up to 40.71" (1034mm) of precipitation.

Snowfall

February through December are months without snowfall.

Ocean temperature

In Biloxi, in September, the average water temperature is 83.1°F (28.4°C).
Note: Water temperature between 77°F (25°C) and 84.2°F (29°C) is regarded as very warm and enjoyable by all. With these temperatures, water activities are pleasurable, without feeling uncomfortable for prolonged periods.

Daylight

In Biloxi, the average length of the day is 12.3h.

Sunshine

In September, the average sunshine is 10h.

UV index

In September, the average daily maximum UV index is 6. A UV Index reading of 6 to 7 represents a high health vulnerability from the exposure to the Sun's UV radiation for the ordinary person.
Note: In September, the average maximum UV index of 6 translate into the following recommendations:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Caution! The reflection of sand and water significantly increases the intensity of the Sun's UV radiation.
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FAQ

What is the temperature in September in Biloxi?

The average high-temperature, in September, in Biloxi, is 86.7°F (30.4°C), while the average low-temperature is 74.3°F (23.5°C). The average heat index (a.k.a. 'real feel', 'apparent temperature'), which takes the relative humidity and factors it into the air temperature reading, in September is evaluated at 98.8°F (37.1°C).

What is the average humidity in September in Biloxi?

In Biloxi, the average relative humidity in September is 74%.

How much does it rain in Biloxi in September?

In Biloxi, in September, during 19.2 rainfall days, 3.86" (98mm) of precipitation is typically accumulated.

When it does not snow in Biloxi?

February through December are months without snowfall in Biloxi, Mississippi.

How warm is the water in September in Biloxi?

In September, the average ocean temperature is 83.1°F (28.4°C). Water temperature between 77°F (25°C) and 84.2°F (29°C) is regarded as very warm and enjoyable by all. With these temperatures, water activities are pleasurable, without feeling uncomfortable for prolonged periods.

How many hours of daylight does Biloxi have in September?

In September, the average length of the day in Biloxi, Mississippi, is 12.3h.

How many hours of sunshine does Biloxi have in September?

The average sunshine in September in Biloxi, Mississippi, is 10h.

What is the UV index reading in September in Biloxi?

In September, the average daily maximum UV index in Biloxi, Mississippi, is 6. A UV Index reading of 6 to 7 represents a high health vulnerability from unprotected exposure to the UV radiation.

Average temperature in September
Biloxi, MS

Average temperature in September - Biloxi, MS
  • Average high temperature in September: 30.4°C

The warmest months (with the highest average high temperature) are July and August (32.1°C).
The month with the lowest average high temperature is January (15.1°C).

  • Average low temperature in September: 23.5°C

The month with the highest average low temperature is August (25.4°C).
The coldest month (with the lowest average low temperature) is January (7.8°C).

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Average pressure in September
Biloxi, MS

Average pressure in September - Biloxi, MS
  • Average pressure in September: 1015.1mbar

The month with the highest atmospheric pressure is January (1021.5mbar).
The month with the lowest atmospheric pressure is June (1014.8mbar).

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Average wind speed in September
Biloxi, MS

Average wind speed in September - Biloxi, MS
  • Average wind speed in September: 10.1km/h

The windiest month (with the highest average wind speed) is April (13.7km/h).
The calmest month (with the lowest average wind speed) is July (9.5km/h).

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Average humidity in September
Biloxi, MS

Average humidity in September - Biloxi, MS
  • Average humidity in September: 74%

The month with the highest relative humidity is December (79%).
The month with the lowest relative humidity is October (70%).

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Average rainfall in September
Biloxi, MS

Average rainfall in September - Biloxi, MS
  • Average rainfall in September: 98mm

The wettest month (with the highest rainfall) is August (161mm).
The driest month (with the least rainfall) is November (53mm).

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Average rainfall days in September
Biloxi, MS

Average rainfall days in September - Biloxi, MS
  • Average rainfall days in September: 19.2 days

The month with the highest number of rainy days is August (24.2 days).
The month with the least rainy days is November (8.3 days).

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Average snowfall in September
Biloxi, MS

Average snowfall in September - Biloxi, MS
  • Average snowfall in September: 0mm

The month with the highest snowfall is January (9mm).
Months with the least snowfall are February, March, April, May, June, July, August, September, October, November and December (0mm).

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Average snowfall days in September
Biloxi, MS

Average snowfall days in September - Biloxi, MS
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (0.4 days).
Months with the least snowfall days are February, March, April, May, June, July, August, September, October, November and December (0 days).

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Average sea temperature in September
Biloxi, MS

Average sea temperature in September - Biloxi, MS
  • Average sea temperature in September: 28.4°C

The best month for swimming (with the highest average sea temperature) is August (30.3°C).
The coldest month (with the lowest average sea temperature) is January (13.6°C).

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Average daylight in September /
Average sunshine in September
Biloxi, MS

Average daylight in September / Average sunshine in September - Biloxi, MS
  • Average daylight in September: 12.3h

The month with the longest days is June (Average daylight: 14.1h).
The month with the shortest days is December (Average daylight: 10.2h).

  • Average sunshine in September: 10h

The month with the most sunshine is June (Average sunshine: 11h).
The month with the least sunshine is December (Average sunshine: 5.2h).

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Average sunshine days in September
Biloxi, MS

Average sunshine days in September - Biloxi, MS
  • Average sunshine days in September: 8.9 days

The month with the most sunshine days is November (19.8 days).
Months with the least sunshine days are July and August (5.1 days).

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Average UV index in September
Biloxi, MS

Average UV index in September - Biloxi, MS
  • Average UV index in September: 6

Months with the highest UV index are May, June, July and August (UV index 7).
Months with the lowest UV index are January, November and December (UV index 4).

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Average cloud cover in September
Biloxi, MS

Average cloud cover in September - Biloxi, MS
  • Average cloud cover in September: 25

The month with the most cloud cover is December (Cloud cover 44).
The month with the least cloud cover is October (Cloud cover 23).

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Average visibility in September
Biloxi, MS

Average visibility in September - Biloxi, MS
  • Average visibility in September: 10km

Months with the highest visibility are May, June, July, August, September, October and November (10km).
Months with the lowest visibility are January, February, March, April and December (9km).

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