May weather forecast
Roseau, Dominica

May invites residents and tourists in Roseau, Dominica, to a distinct tropical weather experience. A significant increase in rainfall, reaching 137mm (5.39"), is easily noticeable and can be attributed to the advancing wet season. However, longer daylight hours and a consistent sea temperature ensure that the city’s vibrant life continues unabated. The UV index remains high, encouraging the prudent use of sun protection. Despite the rain, the city continues to sparkle under the persistent sunshine, highlighting its tenacious spirit.

Temperature

The warmest period falls in May through October, when the average high-temperature reaches 31°C (87.8°F).

Rainfall

In Roseau, during May, the rain falls for 17 days and regularly aggregates up to 137mm (5.39") of precipitation. Throughout the year, in Roseau, there are 218 rainfall days, and 1996mm (78.58") of precipitation is accumulated.

Sea temperature

In May, the average sea temperature is 28°C (82.4°F).
Note: For engaging in water activities including swimming and diving, temperatures from 25°C (77°F) to 29°C (84.2°F) are perceived as perfect, providing pleasure for extended durations.

Daylight

The average length of the day in May in Roseau is 12h and 51min.
On the first day of the month, sunrise is at 05:41 and sunset at 18:23. On the last day of May, sunrise is at 05:34 and sunset at 18:32 AST.

Sunshine

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

UV index

The months with the highest UV index are March through September, with an average maximum UV index of 12. A UV Index value of 11, and more, symbolizes an extreme health hazard from unsafe exposure to UV radiation for the average person.
Note: In May, the maximum UV index of 12 translates into these guidelines:
Implement all key precautions. Warding off sun damage is critical. Limit direct sun exposure especially between 10 a.m. and 4 p.m., when UV radiation is at its peak. However, keep in mind that shade structures may not provide full sun protection. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance. Despite the cloudy weather, sunscreen with a sun protection factor of at least 30 should be liberally applied and reapplied, including after a swim or outdoor activity. Be cautious! Sand and water surfaces make the Sun's UV rays more potent.