May Weather in St. Lucia - 2025

The sovereign island country of St. Lucia is located in the eastern part of the Caribbean and it is part of the West Indies. Before it was named St. Lucia, the native people of the island who were of Amerindian descent called the Island Iyonola. The native Caribs also called the island Hewanorra. Another nickname this beautiful island had was the "Helen of the West Indies" named after Helen of Troy as the French and British constantly fought for control of the island for many years.

Archeological finds on the island suggest the Arawaks were among the earliest settlers on the island from as early as 200AD. There are sites where their detailed and developed pottery work was discovered on the island. Over the years St Lucia's major exports were sugarcane and bananas among other cash crops however in the early 20^th century, years after St Lucia received its independence from Britain more emphasis was laid on tourism and promoting the island as a place for holidaymakers to visit. Today tourism is one of the islands' major sources of income thanks to its stunning landscape, interesting wildlife, and friendly people.

May weather in St. Lucia

To get a good overview of the type of weather you can expect in May in St. Lucia, we will look at the day and night temperature, minimum and maximum water temperature, and if May is comfortable or humid

Generally, May in St. Lucia will be really nice. Historical data shows that you can expect an average temperature of around 80°F / 27°C. Due to the dry air, it will feel very comfortable. During the night, it will cool down to around 78°F / 26°C. Many will prefer a location with air conditioning due to the night temperature.

St. Lucia has its share of rainy days in May. You can expect around 14 rainy days, with on average 3.1 inches / 80 mm of rain during the whole month.

But remember that rain can be short and heavy for many tropical locations, particularly during the rainy season. It means that the number of days with rain and the amount of rain can be high, but you will still see many lovely days with a short period of heavy rain.

May weather in St. Lucia in more detail

To get a better feeling for the type of weather, you can expect in May in St. Lucia, we will look at the temperature, rain, wind, humidity, water temperature, and sun and clouds

- What will the temperature be in St. Lucia in May

Generally, you can expect in May an average temperature of 80°F / 27°C during the day and an average of 78°F / 26°C during the night. In May, during the warmest part of the afternoon, the temperature can often get as high as 80°F / 27°C, and at the end of the night, it can get as low as 77°F / 25°C.

When looking at the whole year, February and March are the coldest months, with an average temperature of around 77°F / 25°C. September and October are the hottest months, with an average temperature of around 82°F / 28°C. When comparing May with the temperature in the month before and after, this is almost equal to April, which sees an average maximum temperature of around 78°F / 26°C. And equal to June, which sees an average maximum temperature of around 80°F / 27°C.

But average temperatures only tell half of the story. It is also good to check the maximum and minimum temperatures. When looking at the whole year, June, July, August, September, October and November are the hottest months, with a temperature of around 82°F / 28°C. January, February and March are the coldest months, with a temperature of around 78°F / 26°C. When comparing May with the temperature in the month before and after, this is equal to April, which sees an average maximum temperature of around 80°F / 27°C. And almost equal to June, which sees an average maximum temperature of around 82°F / 28°C.

In the following graph, you can see how many cold and hot days you can expect in St. Lucia each month:

- Can you expect rain in May in St. Lucia?

Generally, you can expect about 14 rain days in May, with on average 3.1 inches / 80 mm of rain.

When looking at the whole year, March is the dryest month, with an average rainfall of around 1.3 inches / 33 mmmm. October is the wettest month, with an average rainfall of around 7.6 inches / 193 mmmm. When comparing May with the month before and after, this is a lot more than April, which sees around 2 inches / 51 mm of rain. And a lot less than June, which sees around 4.8 inches / 123 mm of rain

If we look at the number of days with rain, April is the month with the least amount of rain days with an average of between 11 and 12 days. October is the month with the most rain days with an average of between 21 and 22 days. When comparing May with the month before and after, this is slightly more than April, which sees an average of between 11 and 12 days of rain. And slightly less than June, which sees an average of between 16 and 17 days of rain

There is one thing that is important to know, in many tropical destinations rain can be short and heavy, particularly during the rainy season. It means that the number of days with rain and the amount of rain can be high, but you will still see many lovely days with a short period of heavy rain.

- What will the water temperature be in St. Lucia for May

You can expect in May, the water temperature for St. Lucia to be between 86°F / 30°C and 80°F / 27°C.

To compare the water temperature we will use the maximum water temperature. You can expect this temperature on a more sunny day, close to the shore, when the wind does not mix the relatively warmer and colder water.

September has the highest water temperature, with an average of between 86°F / 30°C and 87°F / 31°C. February has the lowest water temperature, with around 82°F / 28°C. When comparing the water temperature from May with the month before and after, May has a water temperature almost equal to April, with a water temperature of an average of between 82°F / 28°C and 84°F / 29°C. And almost equal to the water temperature from June, that is an average of between 84°F / 29°C and 86°F / 30°C.

- Can you expect in May a lot of sunny days in St. Lucia

Generally, you can expect around 13 sunny days in May and around 14 partly sunny days. The remaining days will be cloudy.

When looking at the whole year, March is the month with the highest number of sunny days, with an average of between 18 and 19 sunny days. June, July and August And are the months with the lowest number of sunny days, with an average of between 8 and 9 sunny days. When comparing May with the number of sunny days in the month before and after, it is slightly lower than April, with an average of between 16 and 17 sunny days. And slightly more than June, with an average of between 8 and 9 sunny days

We have looked at the sunny days in St. Lucia. Let's also look at the cloudy or overcast days. October is the month with the highest number of cloudy days, with an average of between 7 and 8 cloudy days. February is the month with the lowest number of cloudy days, with an average of between 0 and 1 cloudy days. When comparing May with the number of cloudy days in the month before and after, it is slightly higher than April, with an average of between 1 and 2 cloudy days. And almost equal to June, with an average of between 5 and 6 cloudy days

- Will it be comfortable in May in St. Lucia?

Generally, May in St. Lucia will have dry air, and will feel very comfortable.

We use the humidity and temperature in St. Lucia to calculate the Wintersun Expert Comfort level for each month. The lower the Wintersun Expert Comfort level, the more comfortable it will be. Only for certain people, extremely dry air can feel slightly uncomfortable.

When looking at the whole year, June has the lowest humidity, with a Wintersun Expert comfort level of "comfortable" (very dry air). January has the highest humidity, with a Wintersun Expert comfort level of "slightly uncomfortable" (moderately humid). When comparing May with the month before and after, this is almost equal to April, which has a Wintersun Comfort level of "very comfortable" (dry air). And almost equal to June, which has a Wintersun Comfort level of "comfortable" (very dry air)

What to do in St. Lucia in May

• The two pitons - one of the most recognizable attractions in St Lucia are the two pitons- petit piton and Gros Piton. They are twin volcanic peaks rising dramatically from the sea due to volcanic actions over 300 thousand years ago. The pistons are also a UNESCO world heritage site.
• Anse Chastanet Coral Reef - marine life lovers can have an experience like no other watching or snorkeling with the extensive sea life that inhabits this area. There are also a number of brightly colored sponges and corals as well as fishes and crustaceans.
• Tet Paul Nature Trail - this winding trail affords you an undisturbed view of most of the island. The trail is a UNESCO world heritage listed pistons management area. Along the trail which is considered moderate to easy for most people, you'll find medicinal herbs and plants with the help of a guide, learn about local cassava production, and sample exotic fruits.
• Sulfur springs park - located on mount Soufriere, the Sulphur springs park is home to the only geothermal activity in lesser Antilles. Sulfur was once mined here and there are pools of boiling water and rising steam. These pools can be viewed from a safe distance. You can also opt for a soak in the therapeutic springs close by.
• La Soufriere drive-in volcano - although this volcano hasn't erupted in many years, you can drive in and observe the boiling pools of steam and Sulfur springs.

Is it humid in St. Lucia in May?

A lot of people ask interested in the humidity or relative humidity for St. Lucia in May. But the real question they want to ask is not about humidity but the amount of moisture in the air. Or better, about comfort. Will it be comfortable in May in St. Lucia, or will high humidity make it uncomfortable.

To answer this question, we have to look at the dew point. Relative humidity can change a lot in St. Lucia during the day and night, as it changes when the amount of moisture changes and, but also when the temperature changes. It is a lot less reliable for comfort. Where the dew point only varies with the amount of moisture in the air.

Looking at the dew point, we can see that for the month of May, you can expect that St. Lucia will have dry air, and will feel very comfortable.

June is the month with the most comfort. It will have very dry air, and can feel somewhat uncomfortable for some people. But will be fine for most.. January is the most uncomfortable month. It will be moderately humid, and can feel slightly uncomfortable for some. In the graph, you can see that there is a significant difference between the most comfortable and most uncomfortable months

Is May a good time to go to St. Lucia?

Trying to answer the question of whether May is a good time to go to St. Lucia is not as easy as it first seems. Some people like colder weather, and others prefer a warmer climate. Some are fine with some humidity, and others are not. If your location has air conditioning, the night temperature is less important.

These are some examples. I will try to answer the question with a more generic person in mind. The more detailed information in this article should be enough to check further if this applies to you as well.

If we look at the average temperature for St. Lucia in May, we can see that it will be fine for most people. In May, you can expect it to be really nice, with an average temperature of around 80°F / 27°C. Due to the dry air, it will feel very comfortable. During the night, it will be around 78°F / 26°C.

As the number of overcast days is not high, you can enjoy the sun with around 13 sunny days and 14 partly sunny days.

The last aspect we will look at is rain. You can expect around 14 rainy days, with on average 3.1 inches / 80 mm of rain during May. More then 5 days rain per month makes the chance higher you will see some rain during a shorter stay. But a day with rain does not mean a day you can not enjoy.

We have looked at the average day temperature, the night temperature, humidity, the number of overcast days, and the rain. We think that May a good time to go to St. Lucia for most visitors.

Does it rain all day in St. Lucia in May?

In St. Lucia, it does not rain all day in May. You can expect around 14 rainy days, with on average 3.1 inches / 80 mm of rain during the month.

Another way of looking at the rain is the number of sunny days. For St. Lucia, there are, on average 13 sunny days and 14 partly sunny days in May. That clearly shows that it is not raining all the time.

And, as for many tropical locations, rain can be short and heavy. This applies particularly during the rainy season. It means that the number of days with rain and the amount of rain can be high, but you will still see many lovely days with a short period of heavy rain.

Is May the rainiest month in St. Lucia?

May is not the month with the most rainy days, and not the month with the most rain.

To answer what the rainiest month is in St. Lucia, we will both look at the month with the most rain, and the month with the highest number of rainy days.

October is the month with the the highest number of rainiest days. On average, you can expect 22 days with rain. April is the month with the lowest number of rainy days, with aproximately 11 days.

October is the month with the most rain. This is not equal as the one with the most rainy days. On average, you can expect 7.6 inches / 193 mm of rain. April is the month with the least amount of rain. This is not the same month as the one with the lowest number of rainy days. You can expect approximately 1.3 inches / 33 mm of rain.

Is May the most sunniest month in St. Lucia?

May is not the month with the most sunny days, not the month with the most partly sunny days, and it is not the month with the lowest number of overcast days.

To answer what the sunniest month is in St. Lucia, we will of course look at the month with the most sunniest days, but also look at the month with the biggest number of days that are sunny or partly sunny.

March is the month with the highest number of sunny days. On average, you can expect 13 sunny days, and 14 partly suny days. June, July and August are the months with the lowest number of sunny days.

January is the month with the highest number of sunny days and partly sunny days combined. While October is the month with the lowest number of sunny days and partly sunny days combined.

The last thing we will look at is the number of overcast days. February is the month with the lowest number of overcast days. While October is the month with the highest number of overcast days.

More information about St. Lucia

Weather in St. Lucia in other months

• Weather in St. Lucia for January
• Weather in St. Lucia for February
• Weather in St. Lucia for March
• Weather in St. Lucia for April
• Weather in St. Lucia for June
• Weather in St. Lucia for July
• Weather in St. Lucia for August
• Weather in St. Lucia for September
• Weather in St. Lucia for October
• Weather in St. Lucia for November
• Weather in St. Lucia for December

What to do in St. Lucia for each month

• What to do in January in St. Lucia
• What to do in February in St. Lucia
• What to do in March in St. Lucia
• What to do in April in St. Lucia
• What to do in May in St. Lucia
• What to do in June in St. Lucia
• What to do in July in St. Lucia
• What to do in August in St. Lucia
• What to do in September in St. Lucia
• What to do in October in St. Lucia
• What to do in November in St. Lucia
• What to do in December in St. Lucia