September weather forecast
Cap Estate, Saint Lucia

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Weather in September

September in Cap Estate sees a downturn in rainfall, with totals going down to 63mm (2.48"). A minor spike in temperature is experienced, with the high temperature rising to 30.3°C (86.5°F) which is the highest for the year. This makes this month perfect for indulging in water sports, given that sea temperatures are just right. Tourists enjoy scenic ocean views and beachside fine dining, embracing the pleasant weather. The city's nightlife also warms up, providing a lively atmosphere for nocturnal activities.

Temperature

September, recognised by an average high temperature of 30.3°C (86.5°F) and a low of 27°C (80.6°F), is Cap Estate's warmest month.

Heat index

For most parts of September, the heat index is calculated to be a torrid 37°C (98.6°F). Undertake extra safety actions, heat cramps and heat exhaustion are expected. Heatstroke may result from lengthy activity.
Heat index guidelines indicate values are for light wind scenarios and shaded regions. Under direct sunshine, the heat index values might be elevated by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', is derived by integrating air temperature with the existing relative humidity to express the perceived warmth. The impact of weather on an individual can be subjective, affected by the person's activity and heat perception, which can vary due to elements including wind, clothing, and metabolic differences. When you're directly under the sun's rays, remember that the heat index may surge by 15 Fahrenheit (8 Celsius) degrees. Heat index values are essentially critical for children. Young children are more at risk than adults since they tend to sweat less. Moreover, their large skin surface in proportion to their small bodies and the high heat production due to their activities contribute to their vulnerability.
The physiological response of the human body to excess warmth is to perspire, thereby cooling itself through sweat evaporation. When the level of relative humidity is elevated, evaporation diminishes, causing more warmth to be retained in the body than in dry air. As the body accumulates more heat than it can release, body temperature goes up, increasing the risk of heat-related health issues.

Humidity

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

Rainfall

In September, the rain falls for 20.3 days. Throughout September, 63mm (2.48") of precipitation is accumulated. Throughout the year, 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.
Note: For engaging in any water activities, temperatures from 25°C (77°F) to 29°C (84.2°F) are viewed as outstanding and exceptionally pleasing for prolonged durations.

Daylight

In Cap Estate, the average length of the day in September is 12h and 13min.
On the first day of September in Cap Estate, sunrise is at 05:52 and sunset at 18:15. On the last day of the month, sunrise is at 05:53 and sunset at 17:53 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 in Cap Estate, Saint Lucia. A UV Index estimate of 6 to 7 represents a high threat to health from unsafe exposure to UV radiation for ordinary individuals.
Note: An average maximum UV index of 7 in September leads to these recommendations:
Stick with precautions and abide by sun safety procedures. Evading sunburn is essential. Make an effort to avoid direct sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation, and note that objects like parasols or canopies might not offer full sun protection. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation. Notice! Sand and water reflections contribute to a stronger UV exposure.

Frequently asked questions

What is the hottest time of year in Cap Estate?

The average temperatures in Cap Estate reach their apex in September, averaging 30.3°C (86.5°F) at the high end and 27°C (80.6°F) at the low end.

How hot is September in Cap Estate?

The high-temperature in Cap Estate, Saint Lucia, during September is 30.3°C (86.5°F) and the low-temperature is 27°C (80.6°F). The average heat index (a.k.a. 'feels like', 'apparent temperature'), which calculates the temperature value influenced by the moisture in the air, in September is calculated to be 37°C (98.6°F).

What are the least humid months in Cap Estate?

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

What is the average humidity in September in Cap Estate?

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

How many days does it rain in September in Cap Estate?

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?

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

How warm is the water in September in Cap Estate?

In Cap Estate, Saint Lucia, 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.

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

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

When are sunrise and sunset in September in Cap Estate?

On the first day of September, sunrise is at 05:52 and sunset at 18:15. On the last day of the month, sunrise is at 05:53 and sunset at 17:53 AST.

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

The average sunshine duration 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, Saint Lucia.

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

In September, the average daily maximum UV index is 7. A UV Index estimate of 6 to 7 represents a high health threat from exposure to the Sun's UV radiation.

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).

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).

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).

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%).

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).

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).

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).

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 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 18min).

  • Average sunshine in September: 9h and 4min

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).

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).

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).

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).

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).

Cap Estate, Saint Lucia

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