May weather forecast
Castries City, Saint Lucia

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The beautiful city of Castries, Saint Lucia
The beautiful city of Castries, Saint Lucia

Weather in May

The increasing heat in Castries City during May leads towards the onset of the wet season, with the city experiencing 145mm (5.71") of rainfall. Evenings in the city become a treat with the calm winds and retreating sun creating an alluring ambiance. This month stands as a gateway to the wet season, inaugurating the arrival of heavy showers. Despite the afternoon heat, mornings and evenings remain congenial for outings and adventures. Expect a slight increase in humidity, further enhancing the tropical feature of the city.

Temperature

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

Rainfall

In Castries City, Saint Lucia, in May, during 15 rainfall days, 145mm (5.71") of precipitation is typically accumulated. Throughout the year, there are 208 rainfall days, and 2377mm (93.58") of precipitation is accumulated.

Sea temperature

In Castries City, in May, the average water temperature is 28°C (82.4°F).
Note: Surface water temperatures ranging from 25°C (77°F) to 29°C (84.2°F) are seen as ideal and highly pleasant for extended enjoyment in all water activities.

Daylight

In May, the average length of the day is 12h and 47min.
On the first day of May in Castries City, sunrise is at 05:41 and sunset at 18:20. On the last day of the month, sunrise is at 05:34 and sunset at 18:28 AST.

Sunshine

January through September, November and December, with an average of 8h of sunshine, are months with the most 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 value of 11, and more, symbolizes an ultimate health vulnerability from exposure to the Sun's UV radiation for the ordinary person.
Note: The daily high UV index of 12 in May translates into this advice:
Implement all necessary safeguards, unprotected skin might suffer burns rapidly. Remember that the sun's UV radiation is strongest between 10 a.m. and 4 p.m. Make an effort to avoid direct sun exposure during these hours. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance. Even on overcast days, a sunscreen with a sun protection factor of no less than 30 should be generously applied and reapplied, particularly after swimming or outdoor activities. Attention! UV radiation is ramped up when reflecting off sand and water surfaces.
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Frequently asked questions

What is the hottest time of year in Castries City?

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

How hot does it get in Castries City in May?

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

How much does it rain in Castries City in May?

In Castries City, Saint Lucia, during May, the rain falls for 15 days and regularly aggregates up to 145mm (5.71") of precipitation.

How warm is the water in May in Castries City?

In May, the average sea temperature is 28°C (82.4°F). Water temperature between 25°C (77°F) and 29°C (84.2°F) is regarded as very warm and enjoyable by all. With these temperatures, water activities are pleasurable, without feeling uncomfortable for prolonged periods.

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

In May, the average day length in Castries City, Saint Lucia, is 12h and 47min.

When is the sunrise / sunset in May in Castries City?

In May, on the first day of the month, sunrise is at 05:41 and sunset at 18:20. On the last day of the month, in Castries City, Saint Lucia, sunrise is at 05:34 and sunset at 18:28 AST.

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

January through September, November and December, with an average of 8h of sunshine, are months with the most sunshine.

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

In May, the average sunshine duration is 8h.

What is the month with the highest UV index in Castries City?

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

How high is the UV index in May in Castries City?

In Castries City, Saint Lucia, the average daily maximum UV index in May is 12. A UV Index estimate of 11, and higher, represents an extreme health vulnerability from unprotected exposure to UV radiation.
Average high temperature
Average rainfall days
Average daylight
Average sunshine
Average UV index

Average temperature in May
Castries City, Saint Lucia

Average temperature in May - Castries City, Saint Lucia
  • Average high temperature in May: 30°C

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

  • Average low temperature in May: 24°C

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

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Average rainfall in May
Castries City, Saint Lucia

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 least rainfall) is March (99mm).

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Average rainfall days in May
Castries City, Saint Lucia

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 least rainy days is April (11 days).

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Average sea temperature in May
Castries City, Saint Lucia

Average sea temperature in May - Castries City, Saint Lucia
  • Average sea temperature in May: 28°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).

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Average daylight in May /
Average sunshine in May
Castries City, Saint Lucia

Average daylight in May / Average sunshine in May - Castries City, Saint Lucia
  • Average daylight in May: 12h and 5min

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 May: 8h

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

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Average UV index in May
Castries City, Saint Lucia

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

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Castries City, Saint Lucia

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