September weather forecast
Nevis, Saint Kitts and Nevis

The lovely waterfront of Nevis in Saint Kitts and Nevis, with a distant view of mountains
The lovely waterfront of Nevis in Saint Kitts and Nevis, with a distant view of mountains

Weather in September

The first month of the autumn, September, is still a hot month in Nevis, Saint Kitts and Nevis, with temperature in the range of an average low of 25°C (77°F) and an average high of 31°C (87.8°F).

Temperature

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

Rainfall

September is the month with the most rainfall. Rain falls for 18 days and accumulates 139mm (5.47") of precipitation.

Sea temperature

The months with the warmest seawater are September and October, with an average sea temperature of 29°C (84.2°F).
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 Nevis, the average length of the day in September is 12h and 14min.
On the first day of the month, sunrise is at 05:56 and sunset at 18:23. On the last day of September, sunrise is at 06:00 and sunset at 18:00 AST.

Sunshine

The months with the least sunshine are January through March, May through December, with an average of 8h of sunshine.

UV index

March through September, with an average maximum UV index of 12, are months with the highest UV index in Nevis. A UV Index reading of 11, and higher, represents an ultimate health vulnerability from unsafe exposure to UV radiation for ordinary individuals.
Note: In September, the average maximum UV index of 12 translate into the following recommendations:
Take all required precautions, as unprotected skin and eyes can burn in minutes. 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. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. 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 reflection of water and sand dramatically increases exposure to the UV rays.
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FAQ

What is the warmest month in Nevis?

Warmest months in Nevis, Saint Kitts and Nevis, are June through October, with an average high-temperature of 31°C (87.8°F).

What is the wettest month in Nevis?

September is the month with the most rainfall. Rain falls for 18 days and accumulates 139mm (5.47") of precipitation.

How many days does it rain in September in Nevis?

In Nevis, Saint Kitts and Nevis, during September, the rain falls for 18 days and regularly aggregates up to 139mm (5.47") of precipitation.

What are the months with the warmest sea water in Nevis?

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

What is the sea water temperature in September in Nevis?

In Nevis, Saint Kitts and Nevis, the average seawater temperature in September 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 Nevis?

The average day length in September is 12h and 14min.

When is the sunrise / sunset in September in Nevis?

In September, on the first day of the month, sunrise is at 05:56 and sunset at 18:23. On the last day of the month, in Nevis, Saint Kitts and Nevis, sunrise is at 06:00 and sunset at 18:00 AST.

What is the month with the least sunshine in Nevis?

The months with the least sunshine in Nevis are January through March, May through December, with an average of 8h of sunshine.

How many hours of sunshine does Nevis have in September?

In Nevis, Saint Kitts and Nevis, the average sunshine duration in September is 8h.

When is the highest UV index in Nevis?

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

What is the UV index intensity in September in Nevis?

In September, the average daily maximum UV index in Nevis, Saint Kitts and Nevis, is 12. A UV Index estimate of 11, and higher, represents an extreme health threat from unsafe exposure to Sun's UV rays.

Average temperature in September
Nevis, Saint Kitts and Nevis

Average temperature in September - Nevis, Saint Kitts and Nevis
  • Average high temperature in September: 31°C

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

  • Average low temperature in September: 25°C

The months with the highest average low temperature are June, July, August, September and October (25°C).
The coldest months (with the lowest average low temperature) are January and February (22°C).

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Average rainfall in September
Nevis, Saint Kitts and Nevis

Average rainfall in September - Nevis, Saint Kitts and Nevis
  • Average rainfall in September: 139mm

The wettest month (with the highest rainfall) is September (139mm).
The driest month (with the least rainfall) is March (36mm).

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Average rainfall days in September
Nevis, Saint Kitts and Nevis

Average rainfall days in September - Nevis, Saint Kitts and Nevis
  • Average rainfall days in September: 18 days

The months with the highest number of rainy days are October, November and December (20 days).
The months with the least rainy days are March, April and June (13 days).

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Average sea temperature in September
Nevis, Saint Kitts and Nevis

Average sea temperature in September - Nevis, Saint Kitts and Nevis
  • 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 and March (26°C).

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Average daylight in September /
Average sunshine in September
Nevis, Saint Kitts and Nevis

Average daylight in September / Average sunshine in September - Nevis, Saint Kitts and Nevis
  • Average daylight in September: 12h and 14min

The month with the longest days is June (Average daylight: 13h and 8min).
The month with the shortest days is December (Average daylight: 11h and 8min).

  • Average sunshine in September: 8h

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

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Average UV index in September
Nevis, Saint Kitts and Nevis

Average UV index in September - Nevis, Saint Kitts and Nevis
  • 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 months with the lowest UV index are January and December (UV index 8).

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