The hottest month in Dominica is September when the average maximum temperature is 31°, average temperature is 28° and average minimum temperature is 24°.
The coolest month in Dominica is March when the average maximum temperature is 28°, average temperature is 25° and average minimum temperature is 23°.
The longest days in Dominica are in June, with an average of 13 hours of daylight per day. December has the shortest days with an average of 11.2 hours of daylight per day.
The sunniest days in Dominica are in August which has the most hours of sunshine per day with an average of 10.2 hours of sunshine per day, making it a very sunny and pleasant month with long bright days. March has the least sunshine with an average of 4.9 hours of sunshine per day, making it a sunny month that is overcast at times.
The ultraviolet index is the highest in April when it reaches 14.1 and lowest in December when it reaches 8.4.
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 Dominica are found in September when they peak at 29° and lowest in February when they dip to 26°.
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 Dominica is May with 4.2cm of rain and August has the most days of rain with 19.4 days with some rain, a wet time to visit the beach.
The driest month in Dominica is February with 0.4cm of rain and March has the fewest days of rain with 12.6 days with some rain, a slightly wet time to visit the beach.
The most humid month in Dominica 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 Dominica 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 Dominica is February when the average maximum windspeed is 27kmh and the average wind speed is 15kmh.
The least windy month in Dominica is September when the average maximum windspeed is 17kmh and the average wind speed is 9kmh.