March 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 March

The arrival of March in Saint John marks a minor transition from February. The weather changes balance out, offering more daylight hours and increased sunshine. Out of all standout weather characteristics in March, an increase in UV index up to 12 alongside 2.2" (56mm) of rainfall paints a clear picture of a typical March weather pattern. The month carries forward the city's signature tropical weather, with bountiful sunshine and occasional rain showers.

Temperature

The months of January through March and December see the lowest levels of Saint John's temperatures, averaging a high of 82.4°F (28°C).

Rainfall

In March, the rain falls for 10 days. Throughout March, 2.24" (57mm) of precipitation is accumulated. In Saint John, during the entire year, the rain falls for 156 days and collects up to 49.69" (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.
Note: Water temperatures between 77°F (25°C) and 84.2°F (29°C) are regarded as highly pleasant, making all water activities enjoyable without any discomfort over long durations.

Daylight

In March, the average length of the day is 12h and 3min.
On the first day of the month, sunrise is at 6:37 am and sunset at 6:25 pm. On the last day of March, sunrise is at 6:13 am and sunset at 6:32 pm AST.

Sunshine

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

UV index

March through September, with an average maximum UV index of 12, are months with the highest UV index. A UV Index estimate of 11, and higher, represents an extreme threat to health from unsafe exposure to UV radiation for average individuals.
Note: An average UV index of 12 in March transforms into this advice:
Put into action all important safeguards, unprotected skin may burn swiftly. During the period from 10 a.m. to 4 p.m., UV radiation is highest. Try to avoid direct sunlight during these hours. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration. Broad-spectrum sunscreen with an SPF of 30 or above should be applied generously and reapplied every two hours and right after any outdoor activity or swim. Beware! Reflections from sand and water can intensify the Sun's UV radiation.

Frequently asked questions

What is the coldest time of year?

Saint John's temperatures tend to hit their minimum during January through March and December, with an average high-temperature of 82.4°F (28°C).

How hot is March?

In Saint John, 82.4°F (28°C) is the average high-temperature and 69.8°F (21°C) is the average low-temperature during March.

How much does it rain in Saint John in March?

In Saint John, in March, it is raining for 10 days, with typically 2.24" (57mm) of accumulated precipitation.

What are the months with the coldest ocean?

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

What is the water temperature in March?

In March, the average ocean temperature is 78.8°F (26°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 March?

In Saint John, the average day length in March is 12h and 3min.

What time are sunrise and sunset in March?

On the first day of March in Saint John, sunrise is at 6:37 am and sunset at 6:25 pm. On the last day of the month, sunrise is at 6:13 am and sunset at 6:32 pm AST.

What is the month with the most sunshine?

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

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

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

What are the months with the highest UV index?

The months with the highest UV index are March through September, with an average maximum UV index of 12.

What is the UV index reading in March?

The average daily maximum UV index in March is 12. A UV Index of 11, and more, symbolizes an ultimate hazard to health from unprotected exposure to UV radiation.
Average rainfall days
Average daylight
Average sunshine
Average UV index

Average temperature in March
Saint John, VI

Average temperature in March - Saint John, VI
  • Average high temperature in March: 82°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 March: 70°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 March
Saint John, VI

Average rainfall in March - Saint John, VI
  • Average rainfall in March: 2.2"

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 March
Saint John, VI

Average rainfall days in March - Saint John, VI
  • Average rainfall days in March: 10 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 March
Saint John, VI

Average sea temperature in March - Saint John, VI
  • Average sea temperature in March: 79°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 March /
Average sunshine in March
Saint John, VI

Average daylight in March / Average sunshine in March - Saint John, VI
  • Average daylight in March: 12h and 1min

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 March: 9h

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 March
Saint John, VI

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

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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