Weather in Cruz Bay, St John Island, US Virgin Islands in September

So you're interested in going to Cruz Bay, St John Island, US Virgin Islands in September

September is a hot and rainy time for sunbathing in Cruz Bay. September is an excellent month for swimming in Cruz Bay with very warm sea temperatures. Consider visiting Cruz Bay in the months of March, April, June, July, for the best beach weather. Also consider one of our other suggestions for September.

Temperature in Cruz Bay in September

The average maximum temperature in Cruz Bay in September is 31°. The average maximum temperature is 31° in the previous month and 31° in the next month.

The average temperature in Cruz Bay in September is 29°. The average temperature ranges is 29° in the previous month and 28° in the next month.

The average minimum temperature in Cruz Bay in September is 26°. The minimum temperature is 26° in the previous month and 26° in the next month.

Sunshine in Cruz Bay in September

The average day light hours per day in Cruz Bay in September are 12.2 and there are 9.1 hours of sunshine per day on average during September making it a sunny month with few clouds.

The ultraviolet index in Cruz Bay in September is typically 12.3 during September. 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.

Sea Temperature in Cruz Bay in September

The average sea water temperature in Cruz Bay in September is 28.7° which is very warm and ideal for relaxing and swimming for the whole day.

Rainfall in Cruz Bay in September

The average total rainfall in Cruz Bay in September is 18.8cm and on average there are 19.3 rainy days in September making it a wet time to visit the beach.

Humidity in Cruz Bay in September

The maximum dew point (an indicator of humidity) in Cruz Bay in September is 25° which is very uncomfortable and fairly oppressive unless you are on a beach. At night you would most likely require airconditioning. The dew point is 25° in the previous month and 24° in the next month.

The average maximum relative humidity in Cruz Bay in September is typically 88%. The maximum relative humidity is 86.2% in the previous month and 87.3% in the next month.

The average relative humidity in Cruz Bay in September is typically 77.2%. The average relative humidity is 74.8% in the previous month and 76.6% in the next month.

Wind Speed in Cruz Bay in September

The average maximum wind speed in Cruz Bay in September is typically 27kmh. The average maximum wind speed is 31kmh in the previous month and 29kmh in the next month.

The average wind speed in Cruz Bay in September is typically 14kmh. The average wind speed is 17kmh in the previous month and 14kmh in the next month.

The average wind direction in Cruz Bay in September is from the East-Southeast.

Monthly Averages

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