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

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

Temperature

In Saint John, the average high-temperature remains the same as in June - a still tropical 86°F (30°C). In July, the average low-temperature is 75.2°F (24°C).

Rainfall

In Saint John, in July, during 14 rainfall days, 3.3" (85mm) of precipitation is typically accumulated. Throughout the year, there are 156 rainfall days, and 49.7" (1262mm) of precipitation is accumulated.

Ocean temperature

In Saint John, United States Virgin Islands, the average seawater temperature in July is 82.4°F (28°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.

Daylight

In July, the average length of the day is 13.1h.

Sunshine

Months with the most sunshine in Saint John 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 in Saint John. A UV Index reading of 11, and higher, represents an extreme health hazard from the exposure to the Sun's UV rays for the ordinary person.
The average daily UV index of 12 transform into the following instructions:
Take all required precautions, as unprotected skin and eyes 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. Even on cloudy days, a sunscreen with a minimum 30 sun protection factor should be generously applied and frequently re-applied, including after every swim or outdoor exercise. Beware! The reflection of water and sand dramatically increases exposure to the UV rays.

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, it is raining for 14 days, with typically 3.3" (85mm) of accumulated precipitation.

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 July, the average length of the day in Saint John, United States Virgin Islands, is 13.1h.

What is the month 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.

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

The average sunshine in July is 9h.

What is the month with the highest UV index in Saint John?

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

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

In July, the average daily maximum UV index in Saint John is 12. A UV Index value of 11, and more, symbolizes an ultimate hazard to health from the exposure to the Sun's UV rays.
Average temperature in July - Saint John, VI
  • Average high temperature in July: 86°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 July: 75°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 July - Saint John, VI
  • Average rainfall in July: 3.3"

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 July - Saint John, VI
  • Average rainfall days in July: 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 July - Saint John, VI
  • Average sea temperature in July: 82°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 July / Average sunshine in July - Saint John, VI
  • Average daylight in July: 13.1h

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