September weather forecast
Roseau, Dominica

Weather conditions in September in Roseau, Dominica, resemble those in August, with rain and sunshine co-existing harmoniously. The month sees a slight decline in sea temperature, but the change is barely perceptible. Higher rainfall intensifies the greenery, lending a unique charm to the cityscape. Despite shorter days, the sun refuses to be overshadowed completely. The UV index begins to decrease, but sun protection remains vital, given the tropical location.

Temperature

During May through October, Roseau experiences its warmest period, with an average high-temperature of 31°C (87.8°F).

Rainfall

In Roseau, during September, the rain falls for 23 days and regularly aggregates up to 250mm (9.84") of precipitation. In Roseau, during the entire year, the rain falls for 218 days and collects up to 1996mm (78.58") of precipitation.

Sea temperature

The months with the warmest seawater are September and October, with an average sea temperature of 29°C (84.2°F).
Note: Water activities including swimming and diving at temperatures from 25°C (77°F) to 29°C (84.2°F) are deemed very pleasurable and enjoyable for extended periods, devoid of discomfort.

Daylight

In Roseau, the average length of the day in September is 12h and 13min.
On the first day of the month, sunrise is at 05:53 and sunset at 18:17. On the last day of September, in Roseau, sunrise is at 05:55 and sunset at 17:55 AST.

Sunshine

January, February, September through December, with an average of 7h of sunshine, are months with the least sunshine.

UV index

March through September, with an average maximum UV index of 12, are months with the highest UV index. A UV Index estimate of 11, and higher, represents an ultimate health vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: A typical high UV index of 12 in September suggests the following recommendations:
Execute every important safeguard, as unprotected skin and eyes could burn within moments. Between 10 a.m. and 4 p.m., the Sun emits the most powerful UV radiation. Limit direct exposure to the Sun during these hours. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes. After every outdoor workout or swim, liberally apply and frequently reapply a broad-spectrum SPF 30+ sunscreen. Beware! Reflecting off water and sand, UV rays are much stronger.