The hottest month in Bartolome Island is January when the average maximum temperature is 30°, average temperature is 27° and average minimum temperature is 24°.
The coolest month in Bartolome Island is September when the average maximum temperature is 26°, average temperature is 23° and average minimum temperature is 20°.
The longest days in Bartolome Island are in January, with an average of 12.1 hours of daylight per day. January has the shortest days with an average of 12.1 hours of daylight per day.
The sunniest days in Bartolome Island are in March 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. September 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 March when it reaches 15.7 and lowest in June when it reaches 11.6.
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 Bartolome Island are found in March when they peak at 26° and lowest in September when they dip to 20°.
The sea is best for swimming between December and May when the temperature is above 22° which is warm and pleasant for relaxing and swimming for long periods.
The wettest month in Bartolome Island is February with 0.3cm of rain and the most days of rain with 3.1 days with some rain, a very dry time to visit the beach.
The driest month in Bartolome Island is March with 0cm of rain and the least days of rain with 0 days with some rain, an extremely dry time to visit the beach.
The most humid month in Bartolome Island is April with a dew point (an indicator of humidity) of 24° 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 Bartolome Island is October 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 Bartolome Island is May when the average maximum windspeed is 31kmh and the average wind speed is 22kmh.
The least windy month in Bartolome Island is March when the average maximum windspeed is 19kmh and the average wind speed is 13kmh.
