The hottest month in Gros Islet is September when the average maximum temperature is 31°, average temperature is 28° and average minimum temperature is 26°.
The coolest month in Gros Islet is February when the average maximum temperature is 28°, average temperature is 26° and average minimum temperature is 24°.
The longest days in Gros Islet are in June, with an average of 13 hours of daylight per day. December has the shortest days with an average of 11.3 hours of daylight per day.
The sunniest days in Gros Islet are in August which has the most hours of sunshine per day with an average of 9.2 hours of sunshine per day, making it a sunny month with few clouds. March has the least sunshine with an average of 4 hours of sunshine per day, making it not a particularly sunny month.
The ultraviolet index is the highest in April when it reaches 14.2 and lowest in December when it reaches 8.9.
An ultraviolet index reading above 11 indicates an extreme risk of harm from unprotected sun exposure. Unprotected skin risks burning in less than 10 minutes. Take all precautions because unprotected skin and eyes can burn in minutes. Tanning will be safest before 10am and after 4pm but only with a good application of sun screen. For those with sensitive skin stay in the shade and wear protective clothing, a wide-brimmed hat, and UV-blocking sunglasses. Generously apply broad spectrum SPF 30+ sunscreen every 2 hours, even on cloudy days. Watch out for relections from water that may increase ultraviolet exposure.
The warmest sea water temperatures in Gros Islet are found in September when they peak at 29° and lowest in March when they dip to 27°.
The sea is excellent for swimming all year round as the water temperature is very warm and ideal for relaxing and swimming for the whole day.
The wettest month in Gros Islet is May with 2.5cm of rain and August has the most days of rain with 18 days with some rain, a wet time to visit the beach.
The driest month in Gros Islet is February with 0.2cm of rain and March has the fewest days of rain with 8.9 days with some rain, a dry time to visit the beach.
The most humid month in Gros Islet is August with a dew point (an indicator of humidity) of 25° which is very uncomfortable and fairly oppressive unless you are on a beach. At night you would most likely require airconditioning.
The least humid month in Gros Islet is February with a dew point of 22° which is very humid and quite uncomfortable for most unless you are on a beach. At night you would most likely require a fan.
The most windy month in Gros Islet is June when the average maximum windspeed is 27kmh and the average wind speed is 17kmh.
The least windy month in Gros Islet is November when the average maximum windspeed is 22kmh and the average wind speed is 13kmh.