The Valley
Anguilla
Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
The Valley, Anguilla

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
September, the first month of the autumn, in The Valley, is still a hot month, with average temperature varying between 31°C (87.8°F) and 26°C (78.8°F).

Temperature

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

Humidity

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

Rainfall

Months with the most rainfall are August, September and November, with an average 110mm (4.3") 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 The Valley. 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

The average length of the day in September is 12.2h.

Sunshine

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

UV index

Months with the highest UV index are March through September, with an average maximum UV index of 12. A UV Index reading of 11, and higher, represents an ultimate health vulnerability from the exposure to the Sun's UV radiation for average individuals.
The average daily UV index of 12 in September transform into the following instructions:
Practice all essential precautions. Protection against sun damage is crucial. 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 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. Even on cloudy days, a sunscreen with a minimum 30 sun protection factor should be generously applied and frequently re-applied, including after every swim or outdoor exercise. Beware! The strength of the UV rays is significantly increased by the reflection of the water and sand.

What is the warmest month in The Valley?

Warmest months in The Valley, Anguilla, are June through September, with an average high-temperature of 31°C (87.8°F).

What is the temperature in September in The Valley?

In The Valley, Anguilla, in September, the average high-temperature is 31°C (87.8°F), and the average low-temperature is 26°C (78.8°F).

What is the least humid month in The Valley?

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

What is the average humidity in September in The Valley?

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

How many days does it rain in September in The Valley?

In The Valley, in September, during 19 rainfall days, 110mm (4.3") of precipitation is typically accumulated.

What is the wettest month in The Valley?

Months with the most rainfall in The Valley, Anguilla, are August, September and November, with an average 110mm (4.3") of precipitation.

When is the sea warmest in The Valley?

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

In The Valley, Anguilla, in September, the average water temperature is 29°C (84.2°F). 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.

What is the average length of the day in September in The Valley?

The average length of the day in September in The Valley is 12.2h.

What is the month with the least sunshine in The Valley?

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

How long on average sun shines in September in The Valley?

The average sunshine in September in The Valley is 8h.

When is the highest UV index in The Valley?

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

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

In The Valley, Anguilla, the average daily maximum UV index in September is 12. A UV Index estimate of 11, and higher, represents an extreme health vulnerability from unprotected exposure to the UV radiation.
Average temperature in September - The Valley, Anguilla
  • Average high temperature in September: 31°C

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

  • Average low temperature in September: 26°C

Months with the highest average low temperature are June, July, August, September and October (26°C).
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: 76%

The month with the highest relative humidity is November (78%).
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: 110mm

Wettest months (with the highest rainfall) are August, September and November (110mm).
Driest months (with the lowest rainfall) are February and March (40mm).

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 lowest number of rainy days is April (12 days).

Average sea temperature in September - The Valley, Anguilla
  • Average sea temperature in September: 29°C

Best months for swimming (with the highest average sea temperature) are September and October (29°C).
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: 12.2h

The month with the longest days is June (Average daylight: 13.2h).
The month with shortest days is December (Average daylight: 11.1h).

  • Average sunshine in September: 8h

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

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

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).