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

In October, Saint John's weather conditions record an average high-temperature of a still tropical 86°F (30°C), demonstrating little divergence from the preceding month. During the October nights, an average temperature of 75.2°F (24°C) is observed.

Rainfall

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

Ocean temperature

September and October, with an average ocean temperature of 84.2°F (29°C), are months with the warmest seawater.
Note: With water temperature from 77°F (25°C) to 84.2°F (29°C), all water activities are comfortable and delightful, devoid of discomfort even for lengthened periods.

Daylight

In Saint John, the average length of the day in October is 11h and 43min.
On the first day of October, 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.

Sunshine

In Saint John, the average sunshine in October is 8h.

UV index

In October, the average daily maximum UV index is 10. A UV Index of 8 to 10 symbolizes a very high health vulnerability from unprotected exposure to Sun's UV rays for the average person.
Note: A maximum daily UV index of 10 during October morphs into the following directions:
Taking safety measures is non-negotiable; skin and eyes can be swiftly affected if neglected. Stay out of direct sunlight and seek shade between 10 a.m. and 4 p.m., when UV radiation is strongest, but remember that shade devices may not offer full sun protection. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun. Use liberally and reapply a broad-spectrum sunscreen with at least SPF 30 every two hours and right after outdoor activities or a swim. Heads up! Sand and water reflection magnifies the UV exposure from the Sun.

Frequently asked questions

How hot is 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 rainiest month?

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

How much does it rain in October?

In Saint John, United States Virgin Islands, in October, it is raining for 16 days, with typically 6.34" (161mm) of accumulated precipitation.

What months are the ocean warmest in Saint John?

The months with the warmest seawater are September and October, with an average ocean temperature of 84.2°F (29°C).

How warm is the water in October in Saint John?

In October, the average ocean temperature in Saint John 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.

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

In Saint John, the average day length in October is 11h and 43min.

When is the sunrise / sunset in October in Saint John?

On the first day of October in Saint John, 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 October, the average sunshine duration 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 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).

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").

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).

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).

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).

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).

Saint John, United States Virgin Islands, USA

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