May weather forecast and climate
Roseau, Dominica

A calm, clear waterfront in the valley city of Roseau, Dominica, with mountains afar
A calm, clear waterfront in the valley city of Roseau, Dominica, with mountains afar

Temperature

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

Rainfall

In Roseau, during May, the rain falls for 17 days and regularly aggregates up to 137mm (5.4") of precipitation. In Roseau, Dominica, during the entire year, the rain falls for 218 days and collects up to 1996mm (78.6") of precipitation.

Sea temperature

In Roseau, Dominica, the average water 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.

Daylight

The average length of the day in May is 12.8h.

Sunshine

March through August, with an average of 8h of sunshine, are months with the most sunshine.

UV index

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

What are the warmest months in Roseau?

Warmest months in Roseau, Dominica, are May through October, with an average high-temperature of 31°C (87.8°F).

What is the temperature in May in Roseau?

In May, in Roseau, Dominica, the average high-temperature is 31°C (87.8°F), and the average low-temperature is 23°C (73.4°F).

How many days does it rain in May in Roseau?

In May, in Roseau, Dominica, the rain falls for 17 days. Throughout May, 137mm (5.4") of precipitation is accumulated.

How warm is the water in May in Roseau?

In Roseau, Dominica, 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.

How many hours of daylight does Roseau have in May?

In Roseau, the average length of the day in May is 12.8h.

What is the month with the most sunshine in Roseau?

Months with the most sunshine in Roseau are March through August, with an average of 8h of sunshine.

How many hours of sunshine does Roseau have in May?

In Roseau, the average sunshine in May is 8h.

What are the months with the highest UV index in Roseau?

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

What is the UV index intensity in May in Roseau?

In Roseau, the average UV index in May is 12.
Average temperature in May - Roseau, Dominica
  • Average high temperature in May: 31°C

Warmest months (with the highest average high temperature) are May, June, July, August, September and October (31°C).
Months with the lowest average high temperature are January, February and December (29°C).

  • Average low temperature in May: 23°C

The month with the highest average low temperature is August (24°C).
Coldest months (with the lowest average low temperature) are January, February, March and December (21°C).

Average rainfall in May - Roseau, Dominica
  • Average rainfall in May: 137mm

The wettest month (with the highest rainfall) is November (252mm).
Driest months (with the lowest rainfall) are February and April (87mm).

Average rainfall days in May - Roseau, Dominica
  • Average rainfall days in May: 17 days

The month with the highest number of rainy days is September (23 days).
Months with the lowest number of rainy days are February and April (14 days).

Average sea temperature in May - Roseau, Dominica
  • 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 - Roseau, Dominica
  • Average daylight in May: 12.8h

The month with the longest days is June (Average daylight: 13h).
The month with shortest days is December (Average daylight: 11.2h).

  • Average sunshine in May: 8h

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

Average UV index in May - Roseau, Dominica
  • 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).

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