The hottest month in Kotu is March when the average maximum temperature is 34°, average temperature is 27° and average minimum temperature is 20°.
The coolest month in Kotu is January when the average maximum temperature is 32°, average temperature is 25° and average minimum temperature is 18°.
The longest days in Kotu are in June, with an average of 12.9 hours of daylight per day. December has the shortest days with an average of 11.3 hours of daylight per day.
The sunniest days in Kotu are in April which has the most hours of sunshine per day with an average of 9.9 hours of sunshine per day, making it a sunny month with few clouds. August has the least sunshine with an average of 5.2 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 14.4 and lowest in December when it reaches 9.2.
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 Kotu are found in May when they peak at 30° and lowest in September when they dip to 25°.
The sea is best for swimming between December and June when the temperature is above 28° which is very warm and ideal for relaxing and swimming for the whole day.
The wettest month in Kotu is August with 7.1cm of rain and the most days of rain with 20.3 days with some rain, a very wet time to visit the beach.
The driest month in Kotu is January with 0cm of rain and April 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 Kotu is September with a dew point (an indicator of humidity) of 26° which is extremely humid and uncomfortable unless you are on a beach. At night you would most likely require airconditioning.
The least humid month in Kotu is February with a dew point of 16° which is OK for most but slightly uncomfortable for some.
The most windy month in Kotu is May when the average maximum windspeed is 27kmh and the average wind speed is 12kmh.
The least windy month in Kotu is November when the average maximum windspeed is 18kmh and the average wind speed is 6kmh.