September weather forecast
The Valley, Anguilla

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The Sandy Ground Beach in The Valley, Anguilla with a small boat sailing
The Sandy Ground Beach in The Valley, Anguilla with a small boat sailing

Weather in September

The weather in September closely mirrors that of August, maintaining the 110mm (4.33") rainfall trend and holding steady with sunny climate conditions. Even with a higher frequency of rain, The Valley remains an inviting destination for travelers seeking a blend of sun and showers. The sea continues to stay warm, providing a soothing counterbalance to the sunny days. As September progresses, daylight hours start to shorten, hinting at the impending arrival of autumn. Despite the slight decrease in daylight, the UV index holds at a constant 12, as it has for the vast majority of the year.

Temperature

The Valley experiences the peak of its temperatures in June through September, when the average high-temperatures rise to 31°C (87.8°F).

Heat index

The heat index value for September is calculated to be an extremely hot 40°C (104°F). Undertake extra safety actions, heat cramps and heat exhaustion are expected. Heatstroke may result from lengthy activity.
From a standpoint of the heat index, values pertain to shaded conditions and mild breezes. If directly exposed to the sun, the heat index could rise by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'feels like', gives a temperature feeling by integrating air temperature and humidity. A person's impression of weather can be affected by numerous aspects, among them metabolic variations, pregnancy, and activity levels. One must note that being under the direct sun can escalate the heat's effects, with the heat index possibly rising by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold great significance to children. Kids often lack the knowledge about the necessity to take breaks and consume liquids. Thirst, as a late symptom of dehydration, necessitates the maintenance of hydration, particularly during enduring physical activities.
Perspiring is how the human body naturally cools down, as sweat's evaporation takes away excess heat. In circumstances of high air temperature and humidity (high heat index), the body's perspiration is restricted, heightening the feeling of warmth. 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

February through April, June through September, with an average relative humidity of 76%, are the least humid months in The Valley.

Rainfall

The wettest months are August, September and November, with an average 110mm (4.33") of rainfall.

Sea temperature

September and October, with an average sea temperature of 29°C (84.2°F), are months with the warmest seawater.
Note: Water temperatures between 25°C (77°F) and 29°C (84.2°F) are ideal for all water activities, offering enjoyment without causing discomfort over extended periods.

Daylight

In September, the average length of the day in The Valley is 12h and 14min.
On the first day of September, sunrise is at 05:57 and sunset at 18:26. On the last day of the month, sunrise is at 06:02 and sunset at 18:01 AST.

Sunshine

January, February, May through July, September through December, with an average of 8h of sunshine, are months with the least sunshine.

UV index

The months with the highest UV index in The Valley are March through September, with an average maximum UV index of 12. A UV Index value of 11, and more, symbolizes an ultimate health vulnerability from exposure to the Sun's UV radiation for the ordinary person.
Note: A maximum daily UV index of 12 during September morphs into the following directions:
Practice all-important precautions. Light skin people may get burned in less than 5 minutes. UV radiation from the Sun is most intense between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes. Even if it's cloudy, generously apply and frequently reapply a sunscreen with no less than a 30 sun protection factor after each swim or outdoor exercise. Stay cautious! Sand and water reflections increase UV radiation potency.

Frequently asked questions

What is the warmest month in The Valley?

June through September, with an average high-temperature of 31°C (87.8°F), are warmest months.

How hot is it in The Valley in September?

During September, The Valley experiences an average high-temperature of 31°C (87.8°F) and a low-temperature of 26°C (78.8°F). In September, the average heat index (a.k.a. 'real feel', 'feels like'), which combines relative humidity and air temperature, is calculated to be 40°C (104°F).

What is the least humid month in The Valley?

February through April, June through September, with an average relative humidity of 76%, are the least humid months in The Valley, Anguilla.

What is the average humidity in September in The Valley?

In September, the average relative humidity in The Valley, Anguilla, is 76%.

What is the wettest month in The Valley?

The wettest months are August, September and November, with an average 110mm (4.33") of rainfall.

How much does it rain in The Valley in September?

In September, in The Valley, the rain falls for 19 days. Throughout September, 110mm (4.33") of precipitation is accumulated.

When is the sea warmest in The Valley?

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

What is the sea water temperature in September in The Valley?

In The Valley, 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 The Valley have in September?

In September, the average day length in The Valley is 12h and 14min.

When are sunrise and sunset in September in The Valley?

In September, on the first day of the month, sunrise is at 05:57 and sunset at 18:26. On the last day of the month, sunrise is at 06:02 and sunset at 18:01 AST.

What are the months with the least sunshine in The Valley?

January, February, May through July, September through December, with an average of 8h of sunshine, are months with the least sunshine in The Valley, Anguilla.

How many hours of sunshine does The Valley have in September?

In The Valley, the average sunshine duration in September is 8h.

What is the month with the highest UV index in The Valley?

The months with the highest UV index in The Valley are March through September, with an average maximum UV index of 12.

What is the UV index reading in September in The Valley?

The average daily maximum UV index in September is 12. A UV Index estimate of 11, and higher, represents an extreme health vulnerability from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average daylight
Average sunshine
Average UV index

Average temperature in September
The Valley, Anguilla

Average temperature in September - The Valley, Anguilla
  • Average high temperature in September: 31°C

The warmest months (with the highest average high temperature) are June, July, August and September (31°C).
The months with the lowest average high temperature are January, February, March, April and December (28°C).

  • Average low temperature in September: 26°C

The months with the highest average low temperature are June, July, August, September and October (26°C).
The coldest months (with the lowest average low temperature) are January, February and March (23°C).

Average humidity in September
The Valley, Anguilla

Average humidity in September - The Valley, Anguilla
  • Average humidity in September: 76%

The month with the highest relative humidity is November (78%).
The months with the lowest relative humidity are February, March, April, June, July, August and September (76%).

Average rainfall in September
The Valley, Anguilla

Average rainfall in September - The Valley, Anguilla
  • Average rainfall in September: 110mm

The wettest months (with the highest rainfall) are August, September and November (110mm).
The driest months (with the least rainfall) are February and March (40mm).

Average rainfall days in September
The Valley, Anguilla

Average rainfall days in September - The Valley, Anguilla
  • Average rainfall days in September: 19 days

The month with the highest number of rainy days is November (21 days).
The month with the least rainy days is April (12 days).

Average sea temperature in September
The Valley, Anguilla

Average sea temperature in September - The Valley, Anguilla
  • 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 January, February, March and April (26°C).

Average daylight in September /
Average sunshine in September
The Valley, Anguilla

Average daylight in September / Average sunshine in September - The Valley, Anguilla
  • Average daylight in September: 12h and 1min

The month with the longest days is June (Average daylight: 13h and 12min).
The month with the shortest days is December (Average daylight: 11h and 6min).

  • Average sunshine in September: 8h

The months with the most sunshine are March, April and August (Average sunshine: 9h).
The months with the least sunshine are January, February, May, June, July, September, October, November and December (Average sunshine: 8h).

Average UV index in September
The Valley, Anguilla

Average UV index in September - The Valley, Anguilla
  • Average UV index in September: 12

The months with the highest UV index are March, April, May, June, July, August and September (UV index 12).
The month with the lowest UV index is December (UV index 7).

The Valley, Anguilla

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