July weather forecastSaint John, VI

July
Weather in July
July ushers in the height of summer in Saint John with greater warmth and humidity. The tropical climate becomes intense, drawing visitors to the cool, azure waters. While temperatures edge up slightly, the standout figure is that July shares 3.3" (84mm) of rainfall with June. Matching clear skies with sporadic showers, July offers a well-rounded summer experience in the city.Temperature
Saint John ushers in July with an average high temperature of a still tropical 86°F (30°C), mirroring closely the previous month. Saint John, during July nights, observes an average temperature of 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. In Saint John, during the entire year, the rain falls for 156 days and collects up to 49.69" (1262mm) of precipitation.Ocean temperature
In July, the average ocean temperature in Saint John is 82.4°F (28°C).Note: For swimming, diving, or other water activities, the temperature range of 77°F (25°C) to 84.2°F (29°C) is perceived as exceptionally enjoyable and comfortable even for prolonged periods.
Daylight
The average length of the day in July is 13h and 7min.On the first day of July, 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 6:53 pm AST.
Sunshine
The months with the most sunshine in Saint John are March, April, July and August, with an average of 9h of sunshine.UV index
The months with the highest UV index 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 unprotected exposure to Sun's UV rays for the ordinary person.Note: A typical high UV index of 12 in July suggests the following recommendations:
Adopt all important safety measures, unprotected skin may burn rapidly. Remember that UV radiation from the Sun is strongest between 10 a.m. and 4 p.m. Make an effort to limit direct sun exposure during this time. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses. Apply and frequently reapply a broad-spectrum SPF 30+ sunscreen after every two hours, or immediately after a swim or outdoor exercise. Notice! The Sun's UV exposure elevates with sand and water reflections.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
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).
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").
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).
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).
Average daylight in July /
Average sunshine in July
Saint John, VI
- Average daylight in July: 13h and 6min
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 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).
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).





