September weather forecast
Garrison, Barbados

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Weather in September

September presents a marginal reduction in rainfall, though it still remains relatively high. Compared with August, rainfall volume decreases, wind speeds reduce significantly, and a slight reduction in daylight hours sets in. Wind gusts lower, showing a figure of 27.2km/h (16.9mph). Regardless of the climatic modifications, underwater activities flourish due to the warm sea temperatures. As such, September's weather persists in emphasising Garrison's tropical allure.

Temperature

Garrison witnesses its highest temperatures in September and October, reaching an average of 28.9°C (84°F).

Heat index

During September, the heat index is computed to be a hot 33°C (91.4°F). Incorporate extra safety measures to avoid heat exhaustion and heat cramps. Continuous activity could provoke heatstroke.
Note that heat index values are valued for light wind and location in the shade. A rise of up to 15 Fahrenheit (8 Celsius) degrees in the heat index could result from direct sunlight.
Note: The heat index, also known as 'apparent temperature' or 'real feel', unifies temperature and humidity readings to offer a comprehensive feel of warmth. The experience of temperature can be subjective, varying based on the individual's activity and heat perception, influenced by factors like wind, attire, and metabolic variations. Should you be directly under the sun, anticipate a possible increase in the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are of high significance for children. Younglings frequently fail to recognize the requirement to rest and rehydrate. Thirst emerges late in dehydration - it is imperative to keep hydration levels high, particularly during extended physical exertions.

Humidity

The average relative humidity in September is 75%.

Rainfall

In Garrison, Barbados, in September, during 22.2 rainfall days, 103mm (4.06") of precipitation is typically accumulated. Throughout the year, in Garrison, there are 233.8 rainfall days, and 706mm (27.8") of precipitation is accumulated.

Sea temperature

The month with the warmest seawater is September, with an average sea temperature of 29°C (84.2°F).
Note: Temperatures between 25°C (77°F) and 29°C (84.2°F) are excellent for swimming, diving, and other water activities, providing comfort and enjoyment for extended periods without discomfort.

Daylight

The average length of the day in September in Garrison is 12h and 12min.
On the first day of the month, sunrise is at 05:47 and sunset at 18:09. On the last day of September, sunrise is at 05:47 and sunset at 17:48 AST.

Sunshine

The average sunshine in September in Garrison is 9.4h.

UV index

The months with the highest UV index are January through December, with an average maximum UV index of 7. January through December, with an average maximum UV index of 7, are months with the lowest UV index. A UV Index estimate of 6 to 7 represents a high health hazard from unsafe exposure to UV radiation for ordinary individuals.
Note: During September, 7 as the daily maximum UV index converts into the following advice:
Skirt overexposure. People with light complexions might get scorched in under 20 minutes. The Sun's UV radiation is most potent between the hours of 10 a.m. and 4 p.m. Try to avoid direct sunlight during this time. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Attention! The reflection of both water and sand can increase the intensity of UV rays.
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Frequently asked questions

What part of the year is the hottest in Garrison?

The highest point of temperatures in Garrison falls in September and October, when the average high-temperature ascends to 28.9°C (84°F).

How hot does it get in Garrison in September?

In September, in Garrison, the average high-temperature is 28.9°C (84°F), and the average low-temperature is 27.7°C (81.9°F). In September, the average heat index (a.k.a. 'real feel', 'apparent temperature'), which represents the influence of relative humidity on air temperature, is computed to be 33°C (91.4°F).

What is the average humidity in September in Garrison?

In Garrison, Barbados, the average relative humidity in September is 75%.

How much does it rain in Garrison in September?

In Garrison, Barbados, during September, the rain falls for 22.2 days and regularly aggregates up to 103mm (4.06") of precipitation.

What month is the sea warmest in Garrison?

September is the month with the warmest seawater in Garrison, Barbados, with an average sea temperature of 29°C (84.2°F).

How warm is the water in September in Garrison?

In Garrison, in September, the average water temperature is 29°C (84.2°F). Water temperature between 25°C (77°F) and 29°C (84.2°F) 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 Garrison have in September?

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

When is the sunrise / sunset in September in Garrison?

On the first day of September in Garrison, sunrise is at 05:47 and sunset at 18:09. On the last day of the month, sunrise is at 05:47 and sunset at 17:48 AST.

How many hours of sunshine does Garrison have in September?

In Garrison, Barbados, the average sunshine duration in September is 9.4h.

What are the months with the highest UV index in Garrison?

January through December, with an average maximum UV index of 7, are months with the highest UV index in Garrison.

What is the month with the lowest UV index in Garrison?

The months with the lowest UV index in Garrison, Barbados, are January through December, with an average maximum UV index of 7.

How high is the UV index in September in Garrison?

In September, the average daily maximum UV index in Garrison is 7. A UV Index value of 6 to 7 symbolizes a high hazard to health from unsafe exposure to Sun's UV rays.

Average temperature in September
Garrison, Barbados

Average temperature in September - Garrison, Barbados
  • Average high temperature in September: 28.9°C

The warmest months (with the highest average high temperature) are September and October (28.9°C).
The month with the lowest average high temperature is February (26.8°C).

  • Average low temperature in September: 27.7°C

The month with the highest average low temperature is October (27.8°C).
The coldest month (with the lowest average low temperature) is February (25.7°C).

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Average pressure in September
Garrison, Barbados

Average pressure in September - Garrison, Barbados
  • Average pressure in September: 1012.5mbar

The month with the highest atmospheric pressure is June (1014.8mbar).
The month with the lowest atmospheric pressure is November (1011.2mbar).

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Average wind speed in September
Garrison, Barbados

Average wind speed in September - Garrison, Barbados
  • Average wind speed in September: 19.4km/h

The windiest months (with the highest average wind speed) are January and February (28.3km/h).
The calmest month (with the lowest average wind speed) is September (19.4km/h).

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Average humidity in September
Garrison, Barbados

Average humidity in September - Garrison, Barbados
  • Average humidity in September: 75%

The months with the highest relative humidity are June, July, August and November (77%).
The month with the lowest relative humidity is February (74%).

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Average rainfall in September
Garrison, Barbados

Average rainfall in September - Garrison, Barbados
  • Average rainfall in September: 103mm

The wettest month (with the highest rainfall) is August (126mm).
The driest month (with the least rainfall) is February (13mm).

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Average rainfall days in September
Garrison, Barbados

Average rainfall days in September - Garrison, Barbados
  • Average rainfall days in September: 22.2 days

The month with the highest number of rainy days is July (26.3 days).
The month with the least rainy days is February (11.3 days).

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Average sea temperature in September
Garrison, Barbados

Average sea temperature in September - Garrison, Barbados
  • Average sea temperature in September: 29°C

The best month for swimming (with the highest average sea temperature) is September (29°C).
The coldest months (with the lowest average sea temperature) are February and March (26°C).

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Average daylight in September /
Average sunshine in September
Garrison, Barbados

Average daylight in September / Average sunshine in September - Garrison, Barbados
  • Average daylight in September: 12h and 1min

The month with the longest days is June (Average daylight: 12h and 54min).
The month with the shortest days is December (Average daylight: 11h and 24min).

  • Average sunshine in September: 9h and 2min

The month with the most sunshine is August (Average sunshine: 10h and 12min).
The month with the least sunshine is December (Average sunshine: 6h and 30min).

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Average sunshine days in September
Garrison, Barbados

Average sunshine days in September - Garrison, Barbados
  • Average sunshine days in September: 5.5 days

The month with the most sunshine days is February (14.3 days).
The month with the least sunshine days is July (1.3 days).

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Average UV index in September
Garrison, Barbados

Average UV index in September - Garrison, Barbados
  • Average UV index in September: 7

The months with the highest UV index are January, February, March, April, May, June, July, August, September, October, November and December (UV index 7).
The months with the lowest UV index are January, February, March, April, May, June, July, August, September, October, November and December (UV index 7).

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Average cloud cover in September
Garrison, Barbados

Average cloud cover in September - Garrison, Barbados
  • Average cloud cover in September: 39

The month with the most cloud cover is June (Cloud cover 49).
The months with the least cloud cover are January and February (Cloud cover 37).

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Average visibility in September
Garrison, Barbados

Average visibility in September - Garrison, Barbados
  • Average visibility in September: 10km

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

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Garrison, Barbados

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