September weather forecast
Cap Estate, Saint Lucia

Weather in September

September, the first month of the autumn in Cap Estate, is a hot month, with an average temperature ranging between min 27°C (80.6°F) and max 30.3°C (86.5°F).

Temperature

With an average high-temperature of 30.3°C (86.5°F) and an average low-temperature of 27°C (80.6°F), September is the warmest month.

Heat index

In September, the average heat index is computed to be a very hot 37°C (98.6°F). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke.
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 'apparent temperature', 'feels like', 'felt air temperature', or 'real feel', is a measure of how hot it feels when the actual air humidity is factored in. This effect is subjective, depending on the activity and individual's heat perception influenced by various reasons (clothing, wind, metabolic differences). 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 particularly important for children. 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.
Perspiration is the human body's physiological response to high temperatures and is an attempt to lower body temperature through evaporation of sweat. With a lot of moisture in the air, the evaporation process is not as effective, and the body does not cool down as efficiently, creating a perception of overheating. When heat gain exceeds the level the body can remove, body temperature begins to rise, and heat-related illnesses and disorders may develop.

Humidity

January through March and September, with an average relative humidity of 73%, are the least humid months in Cap Estate.

Rainfall

In Cap Estate, Saint Lucia, in September, it is raining for 20.3 days, with typically 63mm (2.48") of accumulated precipitation. Throughout the year, in Cap Estate, Saint Lucia, there are 255.2 rainfall days, and 560mm (22.05") of precipitation is accumulated.

Sea temperature

September and October, with an average sea temperature of 29°C (84.2°F), are months with the warmest seawater in Cap Estate.
Note: For swimming, diving, and other water activities, temperatures between 25°C (77°F) and 29°C (84.2°F) are perceived as very enjoyable and pleasurable for prolonged periods without feeling uncomfortable.

Daylight

The average length of the day in September is 12h and 13min.
On the first day of the month, sunrise is at 05:51 and sunset at 18:15. On the last day of September, in Cap Estate, sunrise is at 05:53 and sunset at 17:54 AST.

Sunshine

The average sunshine in September is 9.6h.

UV index

January through May, July through December, with an average maximum UV index of 7, are months with the highest UV index. A UV Index reading of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV radiation for the average person.
Note: In September, the average maximum UV index of 7 translate into the following recommendations:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. 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. 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. Tightly woven, loose-fitting clothes provide additional protection from the Sun. 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 warmest month in Cap Estate?

September is the warmest month in Cap Estate, with an average high-temperature of 30.3°C (86.5°F) and an average low-temperature of 27°C (80.6°F).

What is the temperature in September in Cap Estate?

In September, in Cap Estate, Saint Lucia, the average high-temperature is 30.3°C (86.5°F), and the average low-temperature is 27°C (80.6°F). in September, the average heat index (a.k.a. 'apparent temperature', 'real feel'), which combines air temperature and relative humidity, is computed to be 37°C (98.6°F).

What is the least humid month in Cap Estate?

The months with the lowest humidity in Cap Estate, Saint Lucia, are January through March and September, with an average relative humidity of 73%.

What is the average humidity in September in Cap Estate?

In September, the average relative humidity in Cap Estate, Saint Lucia, is 73%.

How much does it rain in Cap Estate in September?

In Cap Estate, in September, during 20.3 rainfall days, 63mm (2.48") of precipitation is typically accumulated.

When is the sea warmest in Cap Estate?

September and October, with an average sea temperature of 29°C (84.2°F), are months with the warmest seawater in Cap Estate.

What is the water temperature in September in Cap Estate?

In Cap Estate, in September, the average water temperature is 29°C (84.2°F). For swimming, diving, and other water activities, temperatures between 25°C (77°F) and 29°C (84.2°F) are perceived as very enjoyable and pleasurable for prolonged periods without feeling uncomfortable.

How many hours of daylight does Cap Estate have in September?

In September, the average day length in Cap Estate is 12h and 13min.

When is the sunrise / sunset in September in Cap Estate?

In September, on the first day of the month, sunrise is at 05:51 and sunset at 18:15. On the last day of the month, sunrise is at 05:53 and sunset at 17:54 AST.

How long on average sun shines in September in Cap Estate?

The average sunshine duration in September in Cap Estate is 9.6h.

When is the highest UV index in Cap Estate?

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

What is the UV index intensity in September in Cap Estate?

The average daily maximum UV index in September is 7. A UV Index estimate of 6 to 7 represents a high hazard to health from unsafe exposure to Sun's UV rays.

Average temperature in September
Cap Estate, Saint Lucia

Average temperature in September - Cap Estate, Saint Lucia
  • Average high temperature in September: 30.3°C

The warmest month (with the highest average high temperature) is September (30.3°C).
The months with the lowest average high temperature are January and February (27.5°C).

  • Average low temperature in September: 27°C

The month with the highest average low temperature is October (27.2°C).
The coldest month (with the lowest average low temperature) is March (25°C).

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Average pressure in September
Cap Estate, Saint Lucia

Average pressure in September - Cap Estate, Saint Lucia
  • Average pressure in September: 1012.6mbar

The month with the highest atmospheric pressure is June (1015mbar).
The month with the lowest atmospheric pressure is November (1011.4mbar).

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Average wind speed in September
Cap Estate, Saint Lucia

Average wind speed in September - Cap Estate, Saint Lucia
  • Average wind speed in September: 16.7km/h

The windiest month (with the highest average wind speed) is February (24.7km/h).
The calmest month (with the lowest average wind speed) is September (16.7km/h).

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Average humidity in September
Cap Estate, Saint Lucia

Average humidity in September - Cap Estate, Saint Lucia
  • Average humidity in September: 73%

The months with the highest relative humidity are May, June, July, August and November (75%).
The months with the lowest relative humidity are January, February, March and September (73%).

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Average rainfall in September
Cap Estate, Saint Lucia

Average rainfall in September - Cap Estate, Saint Lucia
  • Average rainfall in September: 63mm

The wettest month (with the highest rainfall) is August (82mm).
The driest month (with the least rainfall) is February (19mm).

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Average rainfall days in September
Cap Estate, Saint Lucia

Average rainfall days in September - Cap Estate, Saint Lucia
  • Average rainfall days in September: 20.3 days

The month with the highest number of rainy days is July (26.5 days).
The month with the least rainy days is February (16.4 days).

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Average sea temperature in September
Cap Estate, Saint Lucia

Average sea temperature in September - Cap Estate, Saint Lucia
  • Average sea temperature in September: 29°C

The best months for swimming (with the highest average sea temperature) are September and October (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
Cap Estate, Saint Lucia

Average daylight in September / Average sunshine in September - Cap Estate, Saint Lucia
  • Average daylight in September: 12h and 13min

The month with the longest days is June (Average daylight: 12h and 57min).
The month with the shortest days is December (Average daylight: 11h and 19min).

  • Average sunshine in September: 9h and 36min

The month with the most sunshine is April (Average sunshine: 9h and 48min).
The month with the least sunshine is December (Average sunshine: 6h and 24min).

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Average sunshine days in September
Cap Estate, Saint Lucia

Average sunshine days in September - Cap Estate, Saint Lucia
  • Average sunshine days in September: 5.2 days

The month with the most sunshine days is January (7.8 days).
The month with the least sunshine days is July (0.8 days).

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Average UV index in September
Cap Estate, Saint Lucia

Average UV index in September - Cap Estate, Saint Lucia
  • Average UV index in September: 7

The months with the highest UV index are January, February, March, April, May, July, August, September, October, November and December (UV index 7).
The month with the lowest UV index is June (UV index 6).

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Average cloud cover in September
Cap Estate, Saint Lucia

Average cloud cover in September - Cap Estate, Saint Lucia
  • Average cloud cover in September: 40

The months with the most cloud cover are June and July (Cloud cover 48).
The month with the least cloud cover is February (Cloud cover 38).

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Average visibility in September
Cap Estate, Saint Lucia

Average visibility in September - Cap Estate, Saint Lucia
  • 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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