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Sea
27°
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Sea
26°
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26°
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27°
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27°
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28°
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28°
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28°
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29°
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28°
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28°
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27°
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The annual average maximum daily temperature is 29.9°C (85.7°F) which is very warm and perfect for sunbathing on clear days. The annual average water temperature is typically 27.4°C (81.3°F) which is very warm and ideal for relaxing and swimming for the whole day. Annually there are on average 18.8 days of rain per month and 7.4 hours of sun per day.
The best months to visit St John Island are January, February, March, April, for the best beach weather, the most sunshine and optimal sunbathing and swimming conditions with the least chance of rain.
The sea is best for swimming between June and November when the sea temperature is above the average 27°C (81°F) which is very warm and ideal for relaxing and swimming for the whole day.
Yes, you can sunbathe in St John Island all year round.
The coolest month in St John Island is January when the average maximum temperature is 28°C (83°F), average temperature is 26°C (78°F) and average minimum temperature is 23°C (73°F).
More info about the annual temperatures and sunshine.
Yes, you can swim in St John Island all year round.
The warmest sea water temperatures in St John Island are found in September when they peak at 29°C (83°F) and lowest in March when they dip to 26°C (79°F).
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.
More info about the annual sea temperatures
The hottest month in St John Island is July when the average maximum temperature is very hot and perfect for sunbathing on clear days 32°C (89°F), average temperature is 29°C (84°F) and average minimum temperature is 26°C (79°F).
More info about the annual temperatures and sunshine.
The coolest month in St John Island is January when the average maximum temperature is 28°C (83°F), average temperature is 26°C (78°F) and average minimum temperature is 23°C (73°F).
More info about the annual temperatures and sunshine
The driest month in St John Island is February with 4.5cm (1.8inches) of rain and March has the fewest days of rain with 12.5 days with some rain, a pretty wet time to visit the beach.
More info about the annual rainfall
The coldest sea water temperatures in St John Island are found in March when they dip to 26°C (79°F) which is very warm and ideal for relaxing and swimming for the whole day.
More info about the annual sea temperatures.
The warmest sea water temperatures in St John Island are found in September when they peak at 29°C (83°F) which is very warm and ideal for relaxing and swimming for the whole day.
More info about the annual sea temperatures.
The most humid month in St John Island is September with a dew point (an indicator of humidity) of 25°C (77°F) which is very uncomfortable and fairly oppressive unless you are on a beach. At night you would most likely require airconditioning.
More info about the annual humidity.
The least humid month in St John Island is February with a dew point of 21°C (70°F) which is very humid and quite uncomfortable for most unless you are on a beach. At night you would most likely require a fan.
More info about the annual humidity.
The most windy month in St John Island is July when the average maximum windspeed is 32KM/H (20MPH) and the average wind speed is 18KM/H (11MPH).
More info about the annual wind conditions.
The hottest month in St John Island is July when the average maximum temperature is 32°C (89°F), average temperature is 29°C (84°F) and average minimum temperature is 26°C (79°F).
The coolest month in St John Island is January when the average maximum temperature is 28°C (28°F), average temperature is 26°C (78°F) and average minimum temperature is 23°C (73°F).
The longest days in St John Island are in June, with an average of 13.2 hours of daylight per day. December has the shortest days with an average of 11 hours of daylight per day.
The sunniest days in St John Island are in April which has the most hours of sunshine per day. The sunshine percentage is 68% making it sunny but overcast at times. The hours of sunshine per day are 8.4hrs making the days long and bright.
October has the least sunshine. The sunshine percentage is 53% making it quite sunny but with occasional periods of cloudy and overcast skies. There are 6.7 hours of sunshine per day.
The ultraviolet index is the highest in April when it reaches 13.5 and lowest in December when it reaches 7.5.
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 wettest month in St John Island is October with 19.7cm (7.8inches) of rain and November has the most days of rain with 22.8 days with some rain, a very wet time to visit the beach.
The driest month in St John Island is February with 4.5cm (1.8inches) of rain and March has the fewest days of rain with 12.5 days with some rain, a pretty wet time to visit the beach.
The most humid month in St John Island is September with a dew point (an indicator of humidity) of 25°C (77°F) 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 St John Island is February with a dew point of 21°C (70°F) which is very humid and quite uncomfortable for most unless you are on a beach. At night you would most likely require a fan.
Beaches recommended for you today, this weekend, in the next 2 weeks or in any month of the year.
Beaches recommended for you today, this weekend, in the next 2 weeks or in any month of the year.
