The hottest month in Antsiranana is December when the average maximum temperature is 32°, average temperature is 27° and average minimum temperature is 23°.
The coolest month in Antsiranana is July when the average maximum temperature is 29°, average temperature is 24° and average minimum temperature is 19°.
The longest days in Antsiranana are in January, with an average of 12.8 hours of daylight per day. June has the shortest days with an average of 11.4 hours of daylight per day.
The sunniest days in Antsiranana are in October which has the most hours of sunshine per day with an average of 9.8 hours of sunshine per day, making it a sunny month with few clouds. January has the least sunshine with an average of 6.5 hours of sunshine per day, making it a quite sunny month with some cloud cover.
The ultraviolet index is the highest in February when it reaches 15.9 and lowest in June when it reaches 8.6.
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 Antsiranana are found in March when they peak at 29° and lowest in August when they dip to 24°.
The sea is best for swimming between December and May when the temperature is above 27° which is very warm and ideal for relaxing and swimming for the whole day.
The wettest month in Antsiranana is February with 5.3cm of rain and the most days of rain with 12.4 days with some rain, a slightly wet time to visit the beach.
The driest month in Antsiranana is August with 0.1cm of rain and October has the fewest days of rain with 1.3 days with some rain, an extremely dry time to visit the beach.
The most humid month in Antsiranana is February 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 Antsiranana is August with a dew point of 19° which is somewhat uncomfortable for most people in cities but fine on a beach.
The most windy month in Antsiranana is August when the average maximum windspeed is 40kmh and the average wind speed is 29kmh.
The least windy month in Antsiranana is February when the average maximum windspeed is 19kmh and the average wind speed is 9kmh.