Saint John
United States Virgin Islands, USA
Long-term weather forecast
Long-term weather forecast

October weather forecast and climate
Saint John, VI

Beautiful scenery with green vegetation, and the vast blue water around the islands in St John, a cloudy and sunny sky with a great beach scene
Beautiful scenery with green vegetation, and the vast blue water around the islands in St John, a cloudy and sunny sky with a great beach scene
October, like September, is another hot autumn month in Saint John, United States Virgin Islands, with average temperature fluctuating between 75.2°F (24°C) and 86°F (30°C).

Temperature

In October, the average high-temperature is practically the same as in September - a still hot 86°F (30°C). In Saint John, United States Virgin Islands, in October, the average low-temperature is 75.2°F (24°C).

Rainfall

Months with the most rainfall in Saint John are October and November, with an average 6.3" (161mm) of precipitation.

Ocean temperature

September and October, with an average ocean temperature of 84.2°F (29°C), are months with the warmest seawater. Water temperature between 77°F (25°C) and 84.2°F (29°C) is regarded as very warm and enjoyable by all. With these temperatures, water activities are pleasurable, without feeling uncomfortable for prolonged periods.

Daylight

In Saint John, the average length of the day in October is 11.7h.

Sunshine

In Saint John, United States Virgin Islands, the average sunshine is 8h.

UV index

The average daily maximum UV index in Saint John is 10. A UV Index of 8 to 10 symbolizes a very high health vulnerability from the exposure to the Sun's UV radiation for average individuals.
In October, the average maximum UV index of 10 translate into the following recommendations:
Take extra precautions. Fair-skinned individuals may get burned in less than 10 minutes. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. A broad-spectrum sunscreen of SPF 30+ should be liberally applied and re-applied every two hours, and immediately after an outdoor workout or a swim. Beware! The reflection of water and sand dramatically increases exposure to the UV rays.

What is the temperature in October in Saint John?

In October, in Saint John, United States Virgin Islands, the average high-temperature is 86°F (30°C), and the average low-temperature is 75.2°F (24°C).

How much does it rain in Saint John in October?

In Saint John, United States Virgin Islands, in October, during 16 rainfall days, 6.3" (161mm) of precipitation is typically accumulated.

What is the wettest month in Saint John?

The wettest months in Saint John, United States Virgin Islands, are October and November, with an average 6.3" (161mm) of rainfall.

What are the months with the warmest ocean in Saint John?

September and October, with an average ocean temperature of 84.2°F (29°C), are months with the warmest seawater in Saint John. Water temperature between 77°F (25°C) and 84.2°F (29°C) is regarded as very warm and enjoyable by all. With these temperatures, water activities are pleasurable, without feeling uncomfortable for prolonged periods.

What is the water temperature in October in Saint John?

In Saint John, United States Virgin Islands, the average seawater temperature in October is 84.2°F (29°C). For any water activity, surface water temperatures between 77°F (25°C) and 84.2°F (29°C) are considered as excellent and extremely pleasant for lengthened periods.

What is the average length of the day in October in Saint John?

In October, the average length of the day in Saint John is 11.7h.

How many hours of sunshine does Saint John have in October?

The average sunshine in October in Saint John, United States Virgin Islands, is 8h.

What is the UV index intensity in October in Saint John?

The average daily maximum UV index in October is 10. A UV Index reading of 8 to 10 represents a very high hazard to health from the exposure to the Sun's UV rays.
Average temperature in October - Saint John, VI
  • Average high temperature in October: 86°F

Warmest months (with the highest average high temperature) are August and September (88°F).
Months with the lowest average high temperature are January, February, March and December (82°F).

  • Average low temperature in October: 75°F

Months with the highest average low temperature are June, July, August, September and October (75°F).
Coldest months (with the lowest average low temperature) are January, February and March (70°F).

Average rainfall in October - Saint John, VI
  • Average rainfall in October: 6.3"

Wettest months (with the highest rainfall) are October and November (6.3").
The driest month (with the lowest rainfall) is February (2.1").

Average rainfall days in October - Saint John, VI
  • Average rainfall days in October: 16 days

Months with the highest number of rainy days are September and October (16 days).
The month with the lowest number of rainy days is April (9 days).

Average sea temperature in October - Saint John, VI
  • Average sea temperature in October: 84°F

Best months for swimming (with the highest average sea temperature) are September and October (84°F).
Coldest months (with the lowest average sea temperature) are January, February, March and April (79°F).

Average daylight in October / Average sunshine in October - Saint John, VI
  • Average daylight in October: 11.7h

The month with the longest days is June (Average daylight: 13.2h).
The month with shortest days is December (Average daylight: 11h).

  • Average sunshine in October: 8h

Months with most sunshine are March, April, July and August (Average sunshine: 9h).
Months with least sunshine are November and December (Average sunshine: 7).

Average UV index in October - Saint John, VI
  • Average UV index in October: 10

Months with the highest UV index are March, April, May, June, July, August and September (UV index 12).
The month with the lowest UV index is December (UV index 7).