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

March 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
The first month of the spring, March, is still a warm month in Saint John, United States Virgin Islands, with temperature in the range of an average high of 82.4°F (28°C) and an average low of 69.8°F (21°C).

Temperature

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

Rainfall

In March, the rain falls for 10 days. Throughout March, 2.2" (57mm) of precipitation is accumulated. In Saint John, during the entire year, the rain falls for 156 days and collects up to 49.7" (1262mm) of precipitation.

Ocean temperature

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

Daylight

The average length of the day in Saint John is 12.1h.

Sunshine

March, April, July and August, with an average of 9h of sunshine, are months with the most sunshine.

UV index

Months with the highest UV index are March through September, with an average maximum UV index of 12. A UV Index of 11, and more, symbolizes an excessive health risk from the exposure to the Sun's UV rays for average individuals.
The daily maximum UV index of 12 in March interpret into the following advice:
Practice all essential precautions. Protection against sun damage is crucial. 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. 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 strength of the UV rays is significantly increased by the reflection of the water and sand.

What are the coldest months 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).

What is the temperature in March in Saint John?

In March, in Saint John, United States Virgin Islands, the average high-temperature is 82.4°F (28°C), and the average low-temperature is 69.8°F (21°C).

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

In Saint John, United States Virgin Islands, during March, the rain falls for 10 days and regularly aggregates up to 2.2" (57mm) of precipitation.

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

January through April, with an average ocean temperature of 78.8°F (26°C), are months with the coldest seawater in Saint John. 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 water temperature in March in Saint John?

In March, the average ocean temperature is 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.

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

In Saint John, United States Virgin Islands, the average length of the day in March is 12.1h.

What are the months with the most sunshine in Saint John?

March, April, July and August, with an average of 9h of sunshine, are months with the most sunshine in Saint John.

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

The average sunshine in March in Saint John is 9h.

When is the highest UV index in Saint John?

March through September, with an average maximum UV index of 12, are months with the highest UV index in Saint John, United States Virgin Islands.

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

The average daily maximum UV index in March in Saint John, United States Virgin Islands, is 12. A UV Index reading of 11, and higher, represents an excessive health risk from unprotected exposure to the UV radiation.
Average temperature in March - Saint John, VI
  • Average high temperature in March: 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 March: 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 March - Saint John, VI
  • Average rainfall in March: 2.2"

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 March - Saint John, VI
  • Average rainfall days in March: 10 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 March - Saint John, VI
  • Average sea temperature in March: 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 March / Average sunshine in March - Saint John, VI
  • Average daylight in March: 12.1h

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 March: 9h

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 March - Saint John, VI
  • Average UV index in March: 12

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).