May weather forecast
Portsmouth, Dominica

May in Portsmouth is characterized by a noticeable increase in rainfall, with average precipitation amounts rising to 177mm (6.97"). High temperatures beckon beach-goers as the sea's warmth hits its peak. Daylight hours extend, illuminating the city longer and offering extended periods for exploring. A shift from warmer climates to wetter ones usually takes place during this month. Preceding the official hurricane season, May acts as somewhat of a prelude.

Temperature

Portsmouth's weather in May displays an average high-temperature of a still tropical 30°C (86°F), equating to April's conditions. Throughout the month of May, Portsmouth sees a steady low-temperature average of 23°C (73.4°F).

Rainfall

In Portsmouth, Dominica, in May, it is raining for 17 days, with typically 177mm (6.97") of accumulated precipitation. Throughout the year, there are 214 rainfall days, and 2252mm (88.66") of precipitation is accumulated.

Sea temperature

In Portsmouth, the average seawater temperature in May is 28°C (82.4°F).
Note: Swimming, diving, and other activities in water temperatures between 25°C (77°F) and 29°C (84.2°F) are thought to be quite enjoyable and satisfying for extended periods, with no discomfort.

Daylight

The average length of the day in May in Portsmouth, Dominica, is 12h and 52min.
On the first day of the month, sunrise is at 05:41 and sunset at 18:24. On the last day of May, sunrise is at 05:33 and sunset at 18:33 AST.

Sunshine

The months with the most sunshine in Portsmouth are March through August, 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. A UV Index of 11, and more, symbolizes an extreme threat to health from unsafe exposure to UV radiation for the ordinary person.
Note: The UV index of 12 during May translates into the following guidance:
Employ all critical precautions. Guarding against sun damage is essential. From 10 a.m. to 4 p.m., when UV radiation is at its strongest, limit direct exposure to the Sun and note that shade structures may not provide full sun protection. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage. After a swim or outdoor exercise, one should liberally reapply broad-spectrum sunscreen with a sun protection factor of 30 or higher. Take warning! Reflective sand and water surfaces intensify the Sun's UV rays.