The hottest month in Boa Vista is September when the average maximum temperature is 31°, average temperature is 28° and average minimum temperature is 26°.
The coolest month in Boa Vista is February when the average maximum temperature is 25°, average temperature is 22° and average minimum temperature is 19°.
The longest days in Boa Vista are in June, with an average of 13.1 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 Boa Vista are in May which has the most hours of sunshine per day with an average of 8.7 hours of sunshine per day, making it a sunny month with few clouds. December has the least sunshine with an average of 5.8 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 8.2.
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 Boa Vista are found in October when they peak at 27° and lowest in March when they dip to 22°.
The sea is best for swimming between July and December when the temperature is above 24° which is warm and pleasant for relaxing and swimming for long periods.
The wettest month in Boa Vista is September with 1.4cm of rain and the most days of rain with 4.9 days with some rain, a very dry time to visit the beach.
The driest month in Boa Vista is January with 0cm of rain and May has the fewest days of rain with 0 days with some rain, an extremely dry time to visit the beach.
The most humid month in Boa Vista is September with a dew point (an indicator of humidity) of 24° 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 Boa Vista is February with a dew point of 17° which is OK for most but slightly uncomfortable for some.
The most windy month in Boa Vista is May when the average maximum windspeed is 35kmh and the average wind speed is 25kmh.
The least windy month in Boa Vista is August when the average maximum windspeed is 27kmh and the average wind speed is 16kmh.