October weather forecast
Portsmouth, Dominica

With October, Portsmouth steps into its most humid month of the year. The UV index now stands at 11, a slight decrease from the September rating. It retains September's precipitation pattern, with an average rainfall of 279mm (10.98"). As the hurricane season approaches its end, weather conditions turn even more volatile. Jumping ahead to November, a significant downturn in rainfall can be observed.

Temperature

The advent of October in Portsmouth observes an average high-temperature of a still tropical 30°C (86°F), nearly identical to September's 31°C (87.8°F). In Portsmouth, the October nights cool down to an average low of 23°C (73.4°F).

Rainfall

In October, in Portsmouth, the rain falls for 19 days. Throughout October, 279mm (10.98") of precipitation is accumulated. Throughout the year, there are 214 rainfall days, and 2252mm (88.66") of precipitation is accumulated.

Sea temperature

In October, the average sea temperature is 29°C (84.2°F).
Note: For swimming, diving, and enjoying other water activities, the range of 25°C (77°F) to 29°C (84.2°F) in water temperature is considered ideal, offering pleasure for extended periods without discomfort.

Daylight

The average length of the day in October in Portsmouth is 11h and 47min.
On the first day of October in Portsmouth, sunrise is at 05:55 and sunset at 17:54. On the last day of the month, sunrise is at 06:02 and sunset at 17:36 AST.

Sunshine

The average sunshine in October is 7h.

UV index

In October, the average daily maximum UV index is 11. A UV Index value of 11, and more, symbolizes an extreme threat to health from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: A maximum high daily UV index of 11 during October translates into the following directions:
Enforce all necessary precautions, unprotected skin might burn swiftly. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades. Use liberally and reapply a broad-spectrum SPF 30+ sunscreen every two hours, or straight away after any outdoor workout or swim. Notice! Sand and water reflections contribute to a stronger UV exposure.