October weather forecast
Saint John, VI

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Beautiful scenery with green vegetation and the vast blue water around the islands in St John, Virgin Islands
Beautiful scenery with green vegetation and the vast blue water around the islands in St John, Virgin Islands

Weather in October

The arrival of October in Saint John signifies the subtle beginning of the transition away from the intense summer season. While the climate retains its warmth, there is a gentle cooling effect as the month progresses. October is characterized by 6.3" (160mm) of rainfall, marking the year’s highest, making it the wettest month. When combined with the temperate atmosphere, the frequent showers add a different charm to the city's tropical vibe.

Temperature

Saint John's weather in October displays an average high-temperature of a still hot 86°F (30°C), showing minor disparity from September's 87.8°F (31°C). Saint John reports an average nighttime low-temperature of 75.2°F (24°C) in October.

Rainfall

The months with the most rainfall are October and November, with an average 6.34" (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 in Saint John, United States Virgin Islands.
Note: For swimming, diving, and other water activities, temperatures between 77°F (25°C) and 84.2°F (29°C) are perceived as very enjoyable and pleasurable for prolonged periods without feeling uncomfortable.

Daylight

In October, the average length of the day is 11h and 43min.
On the first day of the month, sunrise is at 6:09 am and sunset at 6:07 pm. On the last day of October, in Saint John, sunrise is at 6:18 am and sunset at 5:46 pm AST.

Sunshine

The average sunshine in October in Saint John is 8h.

UV index

In Saint John, United States Virgin Islands, the average daily maximum UV index in October is 10. A UV Index reading of 8 to 10 represents a very high health risk from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: In October, the maximum UV index of 10 translates into these guidelines:
Take extra precautions. Protection against sun damage is required. To the best of your ability, limit your exposure to the sun between the hours of 10 a.m. and 4 p.m., when UV radiation is at its peak. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage. After a swim or an outdoor workout, generously apply and regularly reapply a sunscreen with at least SPF 30, even if the day is cloudy. Heads up! The reflection of sand and water notably intensifies UV rays from the Sun.
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Frequently asked questions

How hot does it get in Saint John in October?

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

What is the wettest month in Saint John?

The wettest months are October and November, with an average 6.34" (161mm) of rainfall.

How many days does it rain in October in Saint John?

In Saint John, during October, the rain falls for 16 days and regularly aggregates up to 6.34" (161mm) of precipitation.

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

The months with the warmest seawater in Saint John, United States Virgin Islands, are September and October, with an average ocean temperature of 84.2°F (29°C).

What is the water temperature in October in Saint John?

In Saint John, United States Virgin Islands, in October, the average water temperature 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 Saint John, United States Virgin Islands, the average day length in October is 11h and 43min.

What time are sunrise and sunset in October in Saint John?

In October, on the first day of the month, sunrise is at 6:09 am and sunset at 6:07 pm. On the last day of the month, sunrise is at 6:18 am and sunset at 5:46 pm AST.

How long on average sun shines in October in Saint John?

The average sunshine duration in October in Saint John is 8h.

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

In Saint John, United States Virgin Islands, the average daily maximum UV index in October is 10. A UV Index estimate of 8 to 10 represents a very high health risk from exposure to the Sun's UV radiation.
Average rainfall days
Average daylight
Average sunshine
Average UV index

Average temperature in October
Saint John, VI

Average temperature in October - Saint John, VI
  • Average high temperature in October: 86°F

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

  • Average low temperature in October: 75°F

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

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Average rainfall in October
Saint John, VI

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

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

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Average rainfall days in October
Saint John, VI

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

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

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Average sea temperature in October
Saint John, VI

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

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

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Average daylight in October /
Average sunshine in October
Saint John, VI

Average daylight in October / Average sunshine in October - Saint John, VI
  • Average daylight in October: 11h and 4min

The month with the longest days is June (Average daylight: 13h and 12min).
The month with the shortest days is December (Average daylight: 11h and 6min).

  • Average sunshine in October: 8h

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

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Average UV index in October
Saint John, VI

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

The 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).

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Saint John, United States Virgin Islands, USA

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