July weather forecast
Saint Helena Island, Saint Helena, Ascension and Tristan da Cunha

July brings about the coldest average temperature for the year on the islands. However, the amount of rainfall is somewhat reduced from the previous months, offering occasional breaks from the persistent showers. On the positive side, despite the cool weather, the UV index begins to rebound, ensuring plenty of sunlight. The typical sea temperature for July is 22°C (71.6°F), serving as a reminder of the island's temperate climate during this month. In general, July's weather is comfortably cool, offering a respite from the heat of the past months.

Temperature

The shift from June to July in Saint Helena Island is characterized by an average high-temperature of a still refreshing 18°C (64.4°F), not significantly different from the 19°C (66.2°F) of June. Maintaining close parity with daytime warmth, the average nocturnal temperature in Saint Helena Island during July stays at a mild 15°C (59°F).

Rainfall

In Saint Helena Island, Saint Helena, Ascension and Tristan da Cunha, in July, it is raining for 16 days, with typically 84mm (3.31") of accumulated precipitation. Throughout the year, in Saint Helena Island, Saint Helena, Ascension and Tristan da Cunha, there are 170 rainfall days, and 748mm (29.45") of precipitation is accumulated.

Sea temperature

In Saint Helena Island, in July, the average water temperature is 22°C (71.6°F).
Note: The cold tolerance of an individual, along with sunshine, wind, and the temperature of the environment, affects the enjoyment of swimming in 22°C (71.6°F) waters. (Olympic swimmers participate in waters ranging from 25°C (77°F) to 28°C (82.4°F).)

Daylight

The average length of the day in July is 11h and 17min.
On the first day of the month, sunrise is at 06:50 and sunset at 18:02. On the last day of July, in Saint Helena Island, sunrise is at 06:46 and sunset at 18:11 GMT.

Sunshine

The months with the most sunshine are June and July, with an average of 16h of sunshine.

UV index

The average daily maximum UV index in July in Saint Helena Island is 8. A UV Index estimate of 8 to 10 represents a very high threat to health from exposure to the Sun's UV rays for average individuals.
Note: In July, a regular UV index of 8 translates into these guidelines:
Always remain cautious. Unprotected skin and eyes are prone to swift harm. Try to minimize direct Sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation. Also note that objects like parasols or canopies might not provide complete sun protection. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim. Attention! UV strength is notably upped by the reflection of sand and water.