December weather forecast
Jamestown, Saint Helena, Ascension and Tristan da Cunha

As the chapter of the year comes to a close, Jamestown, Saint Helena, Ascension, and Tristan da Cunha bask in the full glow of the Southern Hemisphere’s summer. The weather in December is typically warm and inviting, characterized by longer days and higher temperatures soaring up to 24°C (75.2°F). December paints the town’s atmosphere bright and cheery, with families and tourists making the most of the outdoor life. The 3mm (0.12") rainfall and approximately 13.1 hours of daylight make December a month of beaches, picnics, and endless outdoor activities. The patterns are predictably fair and favourable, supporting the ongoing festive seasonal vibes with an abundance of sun.

Temperature

With the advent of December, Jamestown experiences an average high-temperature of a still warm 24°C (75.2°F), mirroring a close resemblance to the previous month. An average nighttime temperature of 19°C (66.2°F) marks December.

Rainfall

January through October and December are months with rainfall. December is the first month it rains in Jamestown, Saint Helena, Ascension and Tristan da Cunha. Throughout December, in the average 1 rainfall days, it receives 3mm (0.12") of precipitation. In Jamestown, Saint Helena, Ascension and Tristan da Cunha, during the entire year, the rain falls for 40.7 days and collects up to 113mm (4.45") of precipitation.

Daylight

With an average of 13h and 6min of daylight, December has the longest days of the year in Jamestown.
On the first day of December in Jamestown, Saint Helena, Ascension and Tristan da Cunha, sunrise is at 05:41 and sunset at 18:42. On the last day of the month, sunrise is at 05:54 and sunset at 18:57 GMT.