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

January 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
January, the same as December, is another warm winter month in Saint John, United States Virgin Islands, with average temperature ranging between min 69.8°F (21°C) and max 82.4°F (28°C).

Temperature

The coldest months are January through March and December, with an average high-temperature of 82.4°F (28°C).

Rainfall

In January, in Saint John, United States Virgin Islands, the rain falls for 14 days. Throughout January, 2.7" (68mm) of precipitation is accumulated. Throughout the year, there are 156 rainfall days, and 49.7" (1262mm) of precipitation is accumulated.

Ocean temperature

Months with the coldest seawater in Saint John 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.

Daylight

In Saint John, United States Virgin Islands, the average length of the day is 11.2h.

Sunshine

In January, the average sunshine is 8h.

UV index

In Saint John, the average daily maximum UV index is 8. A UV Index of 8 to 10 symbolizes a very high threat to health from unsafe exposure to the UV radiation for the ordinary person.
The average daily UV index of 8 in January transform into the following instructions:
Take special precautions, as unprotected eyes and skin can be burned and damaged quickly. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Beware! The reflection of water and sand dramatically increases exposure to the UV rays.

What are the coldest months in Saint John?

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

What is the temperature in January in Saint John?

The average high-temperature, in January, is 82.4°F (28°C), while the average low-temperature is 69.8°F (21°C).

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

In January, the rain falls for 14 days. Throughout January, 2.7" (68mm) of precipitation is accumulated.

When is the ocean coldest in Saint John?

January through April, with an average ocean temperature of 78.8°F (26°C), are months with the coldest 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.

What is the water temperature in January in Saint John?

In Saint John, in January, the average water temperature is 78.8°F (26°C). 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.

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

In January, the average length of the day in Saint John, United States Virgin Islands, is 11.2h.

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

In January, the average sunshine is 8h.

How high is the UV index in January in Saint John?

In Saint John, the average daily maximum UV index in January is 8. A UV Index value of 8 to 10 symbolizes a very high hazard to health from the exposure to the Sun's UV radiation.
Average temperature in January - Saint John, VI
  • Average high temperature in January: 82°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 January: 70°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 January - Saint John, VI
  • Average rainfall in January: 2.7"

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 January - Saint John, VI
  • Average rainfall days in January: 14 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 January - Saint John, VI
  • Average sea temperature in January: 79°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 January / Average sunshine in January - Saint John, VI
  • Average daylight in January: 11.2h

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 January: 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 January - Saint John, VI
  • Average UV index in January: 8

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).