The hottest month in Bali is November when the average maximum temperature is 31°, average temperature is 28° and average minimum temperature is 25°.
The coolest month in Bali is September when the average maximum temperature is 29°, average temperature is 27° and average minimum temperature is 24°.
The longest days in Bali are in January, with an average of 12.6 hours of daylight per day. June has the shortest days with an average of 11.6 hours of daylight per day.
The sunniest days in Bali are in September which has the most hours of sunshine per day with an average of 10.4 hours of sunshine per day, making it a very sunny and pleasant month with long bright days. January has the least sunshine with an average of 7.9 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 9.8.
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 Bali are found in March when they peak at 29° and lowest in August 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 Bali is December with 22cm of rain and January has the most days of rain with 20.3 days with some rain, a very wet time to visit the beach.
The driest month in Bali is August with 0.5cm of rain and the least days of rain with 2.6 days with some rain, a very dry time to visit the beach.
The most humid month in Bali is April with a dew point (an indicator of humidity) of 26° 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 Bali is August with a dew point of 23° 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 Bali is January when the average maximum windspeed is 27kmh and the average wind speed is 14kmh.
The least windy month in Bali is November when the average maximum windspeed is 20kmh and the average wind speed is 8kmh.