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

June heralds the approach of winter on the island as temperatures continue to decrease. Interestingly, despite the cooler weather, both marine and on-land wildlife flourish during this month, with ample opportunities for spotting endemic fauna. While June matches the previous month's highest number of rainy days at 16, the average rainfall reaches a new high at 87mm (3.43"). Meanwhile, the sea temperature dips to 23°C (73.4°F), indicating the onset of cooler sea currents. Thus, June provides a fascinating blend of both temperate and tropical climates.

Temperature

The commencement of June notes an average high-temperature of a comfortable 19°C (66.2°F), exhibiting little difference from the previous month. Throughout June nights, Saint Helena Island records a consistent low-temperature averaging 16°C (60.8°F).

Rainfall

In Saint Helena Island, in June, it is raining for 16 days, with typically 87mm (3.43") of accumulated precipitation. In Saint Helena Island, during the entire year, the rain falls for 170 days and collects up to 748mm (29.45") of precipitation.

Sea temperature

In Saint Helena Island, the average seawater temperature in June is 23°C (73.4°F).
Note: Individual cold sensitivities, influenced by sunshine, wind, and the ambient temperature, play a role in finding a swim in 23°C (73.4°F) water pleasant. (Olympic swimming events mandate water temperatures from 25°C (77°F) to 28°C (82.4°F).)

Daylight

With an average of 11h and 12min of daylight, June has the shortest days of the year in Saint Helena Island, Saint Helena, Ascension and Tristan da Cunha.
On the first day of the month, sunrise is at 06:43 and sunset at 17:57. On the last day of June, in Saint Helena Island, sunrise is at 06:50 and sunset at 18:02 GMT.

Sunshine

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

UV index

June is the month with the lowest UV index, with an average maximum UV index of 7. A UV Index of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV radiation for ordinary individuals.
Note: A daily high UV index of 7 in June leads to these guidelines:
Sustain precautions and conform to sun safety norms. Preventing sunburn is necessary. Between 10 a.m. and 4 p.m., UV radiation is strongest. Make an effort to avoid direct sunlight during this time, remembering that shade structures may not provide full sun protection. Opt for tightly woven and loose clothing to enhance protection from the Sun. Beware! Reflecting off water and sand, UV rays are much stronger.