September weather forecast and climate
Cap Estate, Saint Lucia

Weather in September

The first month of the autumn, September, is a hot month in Cap Estate, Saint Lucia, with average temperature varying between 27°C (80.6°F) and 30.3°C (86.5°F).

Temperature

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

Heat index

In September, the average heat index is appraised at a torrid 36.6°C (97.9°F). Take special precautions - heat exhaustion and heat cramps are expected. Heatstroke may occur with lengthy activity.
Note that heat index values are valued for light wind and location in the shade. With the exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature', 'felt air temperature', 'real feel', or 'feels like', is a measure that combines both air temperature and relative humidity into a single value that indicates how hot the weather feels. Additional factors like activity, clothing, wind, and pregnancy affect individual temperature impact. Be aware that direct exposure to sunlight increases heat impact, and may raise the heat index additionally, 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.
The human body cools itself through perspiration, as excessive warmth is removed from the body through sweat evaporation. When the relative humidity is high, the evaporation rate is reduced. The warmth is removed from the body at a lower rate, causing the body to retain more heat than it would in dry air. 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

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

Rainfall

In Cap Estate, it is raining for 20.3 days, with typically 63mm (2.48") of accumulated precipitation. In Cap Estate, during the entire year, the rain falls for 255.2 days and collects up to 560mm (22.05") of precipitation.

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, Saint Lucia.
Note: For any water activity, surface water temperatures between 25°C (77°F) and 29°C (84.2°F) are considered as excellent and extremely pleasant for lengthened periods.

Daylight

In Cap Estate, the average length of the day is 12.2h.

Sunshine

In September, the average sunshine is 9.6h.

UV index

Months with the highest UV index are January through May, July through December, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high health risk from the exposure to the Sun's UV radiation for average individuals.
Note: The average daily UV index of 7 in September transform into the following instructions:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. 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 warmest month in Cap Estate?

The warmest month in Cap Estate is September, 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 Cap Estate, in September, 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'), that combines air temperature and relative humidity, is appraised at 36.6°C (97.9°F).

What is the least humid month in Cap Estate?

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

What is the average humidity in September in Cap Estate?

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

How much does it rain in Cap Estate in September?

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

What are the months with the warmest sea water in Cap Estate?

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

What is the sea water temperature in September in Cap Estate?

In Cap Estate, the average seawater temperature in September 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.

What is the average length of the day in September in Cap Estate?

In Cap Estate, the average length of the day in September is 12.2h.

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

In Cap Estate, the average sunshine in September is 9.6h.

What are the months with 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 in Cap Estate.

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

In September, the average daily maximum UV index in Cap Estate, Saint Lucia, is 7. A UV Index reading of 6 to 7 represents a high health vulnerability from unsafe exposure to the 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).
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%

Months with the highest relative humidity are May, June, July, August and November (75%).
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: 12.2h

The month with the longest days is June (Average daylight: 13h).
The month with the shortest days is December (Average daylight: 11.3h).

  • Average sunshine in September: 9.6h

The month with the most sunshine is April (Average sunshine: 9.8h).
The month with the least sunshine is December (Average sunshine: 6.4h).

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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

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

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

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

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