September weather forecast
Gulfport, MS

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Inlets in the Gulfport, Mississippi, with a clear far view of the rest of the seaside city
Inlets in the Gulfport, Mississippi, with a clear far view of the rest of the seaside city

Weather in September

September brings a sense of calm to Gulfport's weather, marking the end of the hot, humid summer. The month experiences lowering temperatures when compared to August, giving way to a more pleasant climate. Despite the lingering humidity and a decrease in rainfall that goes down to 4.06" (103mm), the city starts to display autumn's early signs. Thus, Gulfport’s September weather, with its mellowing temperatures and reducing daylight hours, steers the city towards cooler autumn days.

Temperature

As August turns into September, the average high-temperatures rest at a still tropical 86.5°F (30.3°C), showing a minor variation from the prior month. An average nighttime temperature of 74.3°F (23.5°C) is witnessed throughout September.

Heat index

During September, the heat index is computed to be a very hot 98.6°F (37°C). Implement additional cautionary measures, heat cramps and heat exhaustion could occur. Prolonged activity might induce heatstroke.
Heat index evaluations are typically in the context of light winds and shaded environments. The heat index may experience an enhancement of 15 Fahrenheit (8 Celsius) degrees under direct sunlight.
Note: The heat index, also known as 'real feel' or 'felt air temperature', is a single figure representing how weather conditions feel when combining temperature and humidity. A person's impression of weather can be shaped by many aspects, among them metabolic variations, pregnancy, and levels of physical activity. Being aware that direct sunlight can impact the felt heat might mean an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold great significance to children. Youngsters often neglect the necessity for rest and hydration. Thirst is a sign of advancing dehydration - thus the importance of maintaining hydration, specifically during long-lasting physical activities.
The natural method the human body uses to remove excess heat is by perspiring and letting sweat evaporate. During high air temperature and humidity (high heat index), the process of perspiration is hindered, intensifying the sensation of heat. Rising body temperatures resulting from an imbalance in heat absorption can lead to potential thermal issues.

Humidity

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

Rainfall

In Gulfport, in September, it is raining for 19.6 days, with typically 4.06" (103mm) of accumulated precipitation. In Gulfport, during the entire year, the rain falls for 184.5 days and collects up to 43.62" (1108mm) of precipitation.

Snowfall

In Gulfport, snow does not fall in February through December.

Ocean temperature

In Gulfport, the average seawater temperature in September is 82.9°F (28.3°C).
Note: Water temperature ranging between 77°F (25°C) and 84.2°F (29°C) is considered very warm and pleasing for everyone. It allows for enjoyable water activities over extended periods without discomfort.

Daylight

In Gulfport, the average length of the day in September is 12h and 20min.
On the first day of September, sunrise is at 6:33 am and sunset at 7:18 pm. On the last day of the month, sunrise is at 6:49 am and sunset at 6:42 pm CDT.

Sunshine

The average sunshine in September 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 exposure to the Sun's UV radiation for the ordinary person.
Note: In September, a regular UV index of 6 translates into these guidelines:
Incorporate safeguards and honour sun safety principles. Protection from skin and eye damage is obligatory. Try to minimize direct Sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation. Also note that objects like parasols or canopies might not provide complete sun protection. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes. Stay vigilant! UV rays get a boost in intensity due to sand and water reflections.
Updated: Feb 12, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

Is it hot in Gulfport during September?

The high-temperature, in September, in Gulfport, records 86.5°F (30.3°C), while the low-temperature is 74.3°F (23.5°C). The average heat index (a.k.a. 'feels like', 'felt air temperature'), which represents the influence of relative humidity on air temperature, in September is computed to be 98.6°F (37°C).

What is the average humidity in September in Gulfport?

In September, the average relative humidity is 74%.

How much does it rain in Gulfport in September?

In Gulfport, in September, during 19.6 rainfall days, 4.06" (103mm) of precipitation is typically accumulated.

When it does not snow in Gulfport?

In Gulfport, snow does not fall in February through December.

What is the water temperature in September in Gulfport?

In Gulfport, Mississippi, in September, the average water temperature is 82.9°F (28.3°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 Gulfport have in September?

The average day length in September is 12h and 20min.

What time are sunrise and sunset in September in Gulfport?

On the first day of September, sunrise is at 6:33 am and sunset at 7:18 pm. On the last day of the month, sunrise is at 6:49 am and sunset at 6:42 pm CDT.

How many hours of sunshine does Gulfport have in September?

In Gulfport, Mississippi, the average sunshine duration in September is 10h.

What is the UV index reading in September in Gulfport?

The average daily maximum UV index in September in Gulfport, Mississippi, is 6. A UV Index value of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's 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
Gulfport, MS

Average temperature in September - Gulfport, MS
  • Average high temperature in September: 86.5°F

The warmest month (with the highest average high temperature) is July (89.8°F).
The month with the lowest average high temperature is January (59.2°F).

  • Average low temperature in September: 74.3°F

The month with the highest average low temperature is August (77.7°F).
The coldest month (with the lowest average low temperature) is January (46°F).

Average pressure in September
Gulfport, MS

Average pressure in September - Gulfport, MS
  • Average pressure in September: 29.98"Hg

The month with the highest atmospheric pressure is January (30.16"Hg).
The months with the lowest atmospheric pressure are June and August (29.97"Hg).

Average wind speed in September
Gulfport, MS

Average wind speed in September - Gulfport, MS
  • Average wind speed in September: 6.3mph

The windiest month (with the highest average wind speed) is April (8.7mph).
The calmest months (with the lowest average wind speed) are July and August (6mph).

Average humidity in September
Gulfport, MS

Average humidity in September - Gulfport, 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%).

Average rainfall in September
Gulfport, MS

Average rainfall in September - Gulfport, MS
  • Average rainfall in September: 4.06"

The wettest month (with the highest rainfall) is August (6.89").
The driest month (with the least rainfall) is November (2.09").

Average rainfall days in September
Gulfport, MS

Average rainfall days in September - Gulfport, MS
  • Average rainfall days in September: 19.6 days

The month with the highest number of rainy days is August (24.3 days).
The month with the least rainy days is November (8.6 days).

Average snowfall in September
Gulfport, MS

Average snowfall in September - Gulfport, MS
  • Average snowfall in September: 0"

The month with the highest snowfall is January (0.31").
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
Gulfport, MS

Average snowfall days in September - Gulfport, MS
  • Average snowfall days in September: 0 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, September, October and November (0 days).

Average sea temperature in September
Gulfport, MS

Average sea temperature in September - Gulfport, MS
  • Average sea temperature in September: 83°F

The best month for swimming (with the highest average sea temperature) is August (86.5°F).
The coldest month (with the lowest average sea temperature) is January (56.8°F).

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

Average daylight in September / Average sunshine in September - Gulfport, MS
  • 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 0min

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 12min).

Average sunshine days in September
Gulfport, MS

Average sunshine days in September - Gulfport, MS
  • Average sunshine days in September: 8.5 days

The month with the most sunshine days is November (18.9 days).
The month with the least sunshine days is July (4.4 days).

Average UV index in September
Gulfport, MS

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

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

Average cloud cover in September
Gulfport, MS

Average cloud cover in September - Gulfport, 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).

Average visibility in September
Gulfport, MS

Average visibility in September - Gulfport, MS
  • 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).

Gulfport, Mississippi, USA

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