Castries City
Saint Lucia
Long-term weather forecast
Long-term weather forecast

May weather forecast and climate
Castries City, Saint Lucia

A high scenic panorama of the beautiful city of Castries, Saint Lucia
A high scenic panorama of the beautiful city of Castries, Saint Lucia
May, the last month of the spring, in Castries City, is a hot month, with average temperature fluctuating between 30°C (86°F) and 24°C (75.2°F).

Temperature

The warmest months are May through October, with an average high-temperature of 30°C (86°F).

Rainfall

In Castries City, during May, the rain falls for 15 days and regularly aggregates up to 145mm (5.7") of precipitation. Throughout the year, there are 208 rainfall days, and 2377mm (93.6") of precipitation is accumulated.

Sea temperature

In Castries City, the average water temperature is 28°C (82.4°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.

Daylight

In Castries City, Saint Lucia, the average length of the day in May is 12.8h.

Sunshine

Months with the most sunshine in Castries City are January through September, November and 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 Castries City. A UV Index estimate of 11, and higher, represents an ultimate health vulnerability from the exposure to the Sun's UV radiation for average individuals.
In May, the average maximum UV index of 12 translate into the following recommendations:
Practice all essential precautions. Protection against sun damage is crucial. 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. 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 Castries City?

May through October, with an average high-temperature of 30°C (86°F), are warmest months in Castries City.

What is the temperature in May in Castries City?

The average high-temperature, in May, is 30°C (86°F), while the average low-temperature is 24°C (75.2°F).

How many days does it rain in May in Castries City?

In May, in Castries City, Saint Lucia, the rain falls for 15 days. Throughout May, 145mm (5.7") of precipitation is accumulated.

What is the sea water temperature in May in Castries City?

In Castries City, Saint Lucia, the average seawater temperature in May is 28°C (82.4°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 May in Castries City?

In Castries City, Saint Lucia, the average length of the day in May is 12.8h.

What is the month with the most sunshine in Castries City?

Months with the most sunshine in Castries City are January through September, November and December, with an average of 8h of sunshine.

How many hours of sunshine does Castries City have in May?

In Castries City, Saint Lucia, the average sunshine in May is 8h.

When is the highest UV index in Castries City?

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

What is the UV index reading in May in Castries City?

In May, the average daily maximum UV index is 12. A UV Index reading of 11, and higher, represents an excessive health risk from unsafe exposure to the Sun's UV rays.
Average temperature in May - Castries City, Saint Lucia
  • Average high temperature in May: 30°C

Warmest months (with the highest average high temperature) are May, June, July, August, September and October (30°C).
Months with the lowest average high temperature are January, February, March and December (28°C).

  • Average low temperature in May: 24°C

Months with the highest average low temperature are May, June, July, August and September (24°C).
Coldest months (with the lowest average low temperature) are January, February, March and December (22°C).

Average rainfall in May - Castries City, Saint Lucia
  • Average rainfall in May: 145mm

The wettest month (with the highest rainfall) is October (303mm).
The driest month (with the lowest rainfall) is March (99mm).

Average rainfall days in May - Castries City, Saint Lucia
  • Average rainfall days in May: 15 days

The month with the highest number of rainy days is September (24 days).
The month with the lowest number of rainy days is April (11 days).

Average sea temperature in May - Castries City, Saint Lucia
  • Average sea temperature in May: 28°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 February and March (26°C).

Average daylight in May / Average sunshine in May - Castries City, Saint Lucia
  • Average daylight in May: 12.8h

Months with the longest days are June and July (Average daylight: 12.9h).
The month with shortest days is December (Average daylight: 11.3h).

  • Average sunshine in May: 8h

Months with most sunshine are January, February, March, April, May, June, July, August, September, November and December (Average sunshine: 8h).
The month with least sunshine is October (Average sunshine: 7h).

Average UV index in May - Castries City, Saint Lucia
  • Average UV index in May: 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 8).