Monthly 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

What is the coldest month in Saint John?

The coldest months in Saint John, United States Virgin Islands, are January through March and December, with an average high-temperature of 82.4°F (28°C).

How many days does it rain in Saint John?

In Saint John, during the entire year, the rain falls for 156 days and collects up to 49.7" (1262mm) of precipitation.

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

Months with the coldest seawater in Saint John, United States Virgin Islands, are January through April, with an average ocean temperature of 78.8°F (26°C). 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 driest month in Saint John?

The month with the least rainfall in Saint John, United States Virgin Islands, is February when the rain falls for 10 days and typically collects 2.1" (54mm) of precipitation.

What are the months with the highest UV index in Saint John?

March through September, with an average UV index of 12, are months with the highest UV index in Saint John.

What are the warmest months in Saint John?

Warmest months in Saint John are August and September, with an average high-temperature of 87.8°F (31°C).

When is the ocean warmest in Saint John?

September and October, with an average ocean temperature of 84.2°F (29°C), are months with the warmest seawater. 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 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 is the month with the lowest UV index in Saint John?

December is the month with the lowest UV index in Saint John, with an average UV index of 7.
Average temperature - Saint John, VI

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).

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 - Saint John, VI

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 - Saint John, VI

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 - Saint John, VI

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 / Average sunshine - Saint John, VI

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

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 - Saint John, VI

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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