The hottest month in Cuba is August when the average maximum temperature is 28°, average temperature is 24° and average minimum temperature is 21°.
The coolest month in Cuba is January when the average maximum temperature is 23°, average temperature is 19° and average minimum temperature is 16°.
The longest days in Cuba are in June, with an average of 13.5 hours of daylight per day. December has the shortest days with an average of 10.8 hours of daylight per day.
The sunniest days in Cuba are in April which has the most hours of sunshine per day with an average of 8.4 hours of sunshine per day, making it a sunny month with few clouds. October has the least sunshine with an average of 6.8 hours of sunshine per day, making it a quite sunny month with some cloud cover.
The ultraviolet index is the highest in May when it reaches 12.8 and lowest in December when it reaches 6.3.
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 Cuba are found in September when they peak at 30° and lowest in March when they dip to 25°.
The sea is best for swimming between May and December when the temperature is above 28° which is very warm and ideal for relaxing and swimming for the whole day.
The wettest month in Cuba is October with 2.1cm of rain and June has the most days of rain with 10.1 days with some rain, a slightly wet time to visit the beach.
The driest month in Cuba is March with 0cm of rain and the least days of rain with 3.4 days with some rain, a very dry time to visit the beach.
The most humid month in Cuba is August with a dew point (an indicator of humidity) 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 least humid month in Cuba is January with a dew point of 17° which is OK for most but slightly uncomfortable for some.
The most windy month in Cuba is March when the average maximum windspeed is 24kmh and the average wind speed is 12kmh.
The least windy month in Cuba is September when the average maximum windspeed is 19kmh and the average wind speed is 8kmh.