December weather forecast
South Georgia and the South Sandwich Islands

December in South Georgia and the South Sandwich Islands marks the arrival of the Antarctic summer, the warmest season of the year. Average temperatures during this month can fluctuate from 5°C (41°F) to 11°C (51.8°F), presenting the highest values the islands experience throughout the year.

Grytviken, like the rest of the islands, experiences milder conditions during December. Temperatures in this settlement are slightly warmer due to the ocean's moderating influence, which also results in a reduced likelihood of frost compared to higher altitude regions.

Wind speeds in December are generally lower, with averages around 15km/h (9.3mph), making it one of the calmest months in terms of wind. The frequency of severe storm events is significantly diminished compared to the colder months, contributing to a generally more pleasant and predictable weather pattern.

Rainfall is the primary form of precipitation in December, particularly in coastal areas such as Grytviken. However, in the higher altitude areas of the islands, snowfall can still occasionally occur if temperatures drop below freezing, though this is less common than in the winter and spring months.

The arrival of summer and its milder weather conditions in December coincide with a peak in wildlife activity on the islands. A variety of bird species, including the large colonies of penguins and albatrosses, as well as seals, are at their most active during this period, either breeding or raising their young.

Compared to November, December is warmer and calmer, with the majority of precipitation falling as rain. Looking forward into January, these summer conditions continue, with temperatures remaining relatively high, wind speeds staying low, and rain continuing to be the most common form of precipitation.

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• South Georgia Island - December »
  The month with the least rainfall in South Georgia Island is December, when 77mm (3.03") of precipitation is typically aggregated. On the last day of December, in South Georgia Island, sunrise is at 03:55 and sunset at 21:03 -02.
• Grytviken - December »
  In Grytviken in December, during 17.8 rainfall days, 94mm (3.7") of precipitation is typically accumulated. The months with the lowest UV index in Grytviken are January through December, with an average maximum UV index of 1.
• Stromness - December »
  January through December, with an average maximum UV index of 1, are months with the highest UV index in Stromness, South Georgia and the South Sandwich Islands. The months with the lowest UV index in Stromness, South Georgia and the South Sandwich Islands, are January through December, with an average maximum UV index of 1.