July weather forecast
Saint John, VI

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 July

July, like June, is a hot summer month in Saint John, United States Virgin Islands, with an average temperature fluctuating between 75.2°F (24°C) and 86°F (30°C).

Temperature

In Saint John, United States Virgin Islands, the average high-temperature in July remains equal as in June - a still hot 86°F (30°C). The average low-temperature, in July, is 75.2°F (24°C).

Rainfall

In Saint John, in July, it is raining for 14 days, with typically 3.35" (85mm) of accumulated precipitation. Throughout the year, there are 156 rainfall days, and 49.69" (1262mm) of precipitation is accumulated.

Ocean temperature

In July, the average ocean temperature in Saint John is 82.4°F (28°C).
Note: 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.

Daylight

The average length of the day in July is 13h and 7min.
On the first day of the month, sunrise is at 5:46 am and sunset at 6:59 pm. On the last day of July, in Saint John, United States Virgin Islands, sunrise is at 5:56 am and sunset at 6:54 pm AST.

Sunshine

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

UV index

The months with the highest UV index in Saint John are March through September, with an average maximum UV index of 12. A UV Index value of 11, and more, symbolizes an extreme threat to health from exposure to the Sun's UV rays for average individuals.
Note: The daily maximum UV index of 12 in July interpret into the following advice:
Take all necessary precautions, as unprotected skin can burn in minutes. 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. Caution! The reflection of sand and water significantly increases the intensity of the Sun's UV radiation.
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FAQ

What is the temperature in July in Saint John?

In Saint John, United States Virgin Islands, in July, the average high-temperature is 86°F (30°C), and the average low-temperature is 75.2°F (24°C).

How much does it rain in Saint John in July?

In Saint John, in July, during 14 rainfall days, 3.35" (85mm) of precipitation is typically accumulated.

What is the water temperature in July in Saint John?

In Saint John, in July, the average water temperature is 82.4°F (28°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 average length of the day in July in Saint John?

In Saint John, United States Virgin Islands, the average day length in July is 13h and 7min.

When are sunrise and sunset in July in Saint John?

On the first day of July in Saint John, sunrise is at 5:46 am and sunset at 6:59 pm. On the last day of the month, sunrise is at 5:56 am and sunset at 6:54 pm AST.

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

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

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

In Saint John, United States Virgin Islands, the average sunshine duration in July is 9h.

When is the highest UV index in Saint John?

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

What is the UV index reading in July in Saint John?

The average daily maximum UV index in July in Saint John is 12. A UV Index reading of 11, and higher, represents an extreme health threat from unsafe exposure to Sun's UV rays.
Average high temperature
Average rainfall days
Average sunshine
Average UV index

Average temperature in July
Saint John, VI

Average temperature in July - Saint John, VI
  • Average high temperature in July: 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 July: 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).

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Average rainfall in July
Saint John, VI

Average rainfall in July - Saint John, VI
  • Average rainfall in July: 3.3"

The wettest months (with the highest rainfall) are October and November (6.3").
The driest month (with the least rainfall) is February (2.1").

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Average rainfall days in July
Saint John, VI

Average rainfall days in July - Saint John, VI
  • Average rainfall days in July: 14 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).

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Average sea temperature in July
Saint John, VI

Average sea temperature in July - Saint John, VI
  • Average sea temperature in July: 82°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).

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Average daylight in July /
Average sunshine in July
Saint John, VI

Average daylight in July / Average sunshine in July - Saint John, VI
  • Average daylight in July: 13h and 7min

The month with the longest days is June (Average daylight: 13h and 13min).
The month with the shortest days is December (Average daylight: 11h and 3min).

  • Average sunshine in July: 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).

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Average UV index in July
Saint John, VI

Average UV index in July - Saint John, VI
  • Average UV index in July: 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).

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