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

Weather shifts brought about by the new year usher in a warm start to January in Saint Helena Island, Ascension, and Tristan da Cunha. Beachgoers appreciate the warmer conditions and may witness dramatic but brief rainy spells. Although less sunlight is visible in January compared to December, the UV index remains at its highest at 12, necessitating protective measures against the sun. There is an expected rainfall amount of up to 53mm (2.09"). This pattern of warm and wet weather sets a distinctive tone for the island's version of summertime.

Temperature

The commencement of January introduces an average high-temperature of a still agreeable 22°C (71.6°F), closely mirroring the preceding month. In January, Saint Helena Island experiences a marginal drop in temperature, with averages of 18°C (64.4°F) at night.

Rainfall

In Saint Helena Island, during January, the rain falls for 14 days and regularly aggregates up to 53mm (2.09") of precipitation. Throughout the year, there are 170 rainfall days, and 748mm (29.45") of precipitation is accumulated.

Sea temperature

In January, the average sea temperature is 23°C (73.4°F).
Note: Swimming in 23°C (73.4°F) water can be enjoyable based on one's cold tolerance and conditions like sunshine, wind, and ambient temperature. (Olympic swimmers compete in waters between 25°C (77°F) and 28°C (82.4°F).)

Daylight

The average length of the day in January is 12h and 57min.
On the first day of January in Saint Helena Island, sunrise is at 05:54 and sunset at 18:57. On the last day of the month, sunrise is at 06:11 and sunset at 19:00 GMT.

Sunshine

In Saint Helena Island, Saint Helena, Ascension and Tristan da Cunha, the average sunshine in January is 14h.

UV index

The months with the highest UV index in Saint Helena Island, Saint Helena, Ascension and Tristan da Cunha, are January through March, October through December, with an average maximum UV index of 12. A UV Index estimate of 11, and higher, represents an excessive health risk from unsafe exposure to UV radiation for the average person.
Note: In January, a daily maximum UV index of 12 leads to the following instructions:
Enforce every key safety measure. Those with light skin might get burns in a matter of minutes. The Sun's UV radiation is at its strongest between the hours of 10 a.m. and 4 p.m. Minimize direct exposure to the sun during this period. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays. Avoid direct sun exposure for long periods, especially if prone to burns. Always apply a sunscreen with at least a 30 SPF. Attention! The combination of sand and water reflections enhances UV ray intensity.