January weather forecast
Grytviken, South Georgia and the South Sandwich Islands

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Weather in January

In Grytviken, January's weather brings typical Antarctic conditions with prevailing chilly temperatures and an increased chance of snowfall. The days are relatively long compared to other months, and the city experiences a high average humidity of 91%. This period records its highest rainfall, receiving a significant 112mm (4.41") of precipitation, most likely the outcome of long daylight hours. Beach-goers may find the sea temperatures unbearably cold, while trekkers should be prepared for high chances of snowiness. The month is confirmed to be the windiest, with average wind speeds reaching up to 23.7km/h (14.7mph).

Temperature

The arrival of January records an average high-temperature of a still wintry 2.6°C (36.7°F), closely related to the 1.9°C (35.4°F) observed in December. Grytviken, during January nights, records a temperature marginally cooler than the daytime average, at a still icy 0.5°C (32.9°F).

Humidity

January and February, with an average relative humidity of 91%, are the most humid months.

Rainfall

In January, the rain falls for 20.4 days. Throughout January, 112mm (4.41") of precipitation is accumulated. In Grytviken, during the entire year, the rain falls for 168.8 days and collects up to 1190mm (46.85") of precipitation.

Snowfall

Months with snowfall are January through December. In Grytviken, in January, snow falls for 15.7 days, with typically accumulated 208mm (8.19") of snow. In Grytviken, during the entire year, snow falls for 193 days and aggregates up to 3130mm (123.23") of snow.

Sea temperature

The months with the warmest seawater are January through April, with an average sea temperature of 3°C (37.4°F).
Note: For swimming, this is considered very dangerous and immediately life-threatening. Total loss of breathing control instantly occurs, and clear thinking becomes almost impossible. A specialized swimsuit is obligatory to minimize thermal loss.

Daylight

The average length of the day in January is 16h and 28min.
On the first day of January, sunrise is at 03:56 and sunset at 21:02. On the last day of the month, sunrise is at 04:49 and sunset at 20:29 -02.

Sunshine

In January, the average sunshine is 4.7h.

UV index

January through December, with an average maximum UV index of 1, are months with the highest UV index in Grytviken. January through December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index estimate of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV radiation for ordinary individuals.
Note: A typical high UV index of 1 in January suggests the following recommendations:
Protection from prolonged sun exposure is necessary for babies, children, and individuals with sensitive skin. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades. Be careful! The Sun's UV radiation can nearly be doubled by the reflective quality of snow.

Frequently asked questions

How cold is it in January?

In Grytviken, 2.6°C (36.7°F) is the average high-temperature and 0.5°C (32.9°F) is the average low-temperature during January.

What is the most humid month?

The months with the highest humidity are January and February, with an average relative humidity of 91%.

What is the average humidity in January?

In Grytviken, the average relative humidity in January is 91%.

How much does it rain in January?

In January, the rain falls for 20.4 days. Throughout January, 112mm (4.41") of precipitation is accumulated.

How much does it snow in January?

In Grytviken, in January, during 15.7 snowfall days, 208mm (8.19") of snow is typically accumulated.

When is the sea warmest?

January through April, with an average sea temperature of 3°C (37.4°F), are months with the warmest seawater.

How cold is the water in January?

In Grytviken, in January, the average water temperature is 3°C (37.4°F). For swimming, this is considered extremely cold, dangerous, and life-threatening. Unless suitably protected with insulated waterproof clothing, hypothermia quickly occurs.

How many hours of daylight does Grytviken have in January?

In Grytviken, the average day length in January is 16h and 28min.

What time are sunrise and sunset in January?

In January, on the first day of the month, sunrise is at 03:56 and sunset at 21:02. On the last day of the month, sunrise is at 04:49 and sunset at 20:29 -02.

How many hours of sunshine does Grytviken have in January?

In January, the average sunshine duration is 4.7h.

What is the month with the highest UV index?

The months with the highest UV index are January through December, with an average maximum UV index of 1.

What is the month with the lowest UV index?

The months with the lowest UV index are January through December, with an average maximum UV index of 1.

How high is the UV index in January?

In January, the average daily maximum UV index is 1. A UV Index of 2, and less, symbolizes a minimal hazard to health from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in January
Grytviken, South Georgia and the South Sandwich Islands

Average temperature in January - Grytviken, South Georgia and the South Sandwich Islands
  • Average high temperature in January: 2.6°C

The warmest month (with the highest average high temperature) is February (3.1°C).
The month with the lowest average high temperature is August (-1.6°C).

  • Average low temperature in January: 0.5°C

The month with the highest average low temperature is February (1°C).
The coldest month (with the lowest average low temperature) is August (-4.9°C).

Average pressure in January
Grytviken, South Georgia and the South Sandwich Islands

Average pressure in January - Grytviken, South Georgia and the South Sandwich Islands
  • Average pressure in January: 994.4mbar

The month with the highest atmospheric pressure is September (1002.1mbar).
The month with the lowest atmospheric pressure is December (992.9mbar).

Average wind speed in January
Grytviken, South Georgia and the South Sandwich Islands

Average wind speed in January - Grytviken, South Georgia and the South Sandwich Islands
  • Average wind speed in January: 23.7km/h

The windiest month (with the highest average wind speed) is September (25.7km/h).
The calmest month (with the lowest average wind speed) is December (23.5km/h).

Average humidity in January
Grytviken, South Georgia and the South Sandwich Islands

Average humidity in January - Grytviken, South Georgia and the South Sandwich Islands
  • Average humidity in January: 91%

The months with the highest relative humidity are January and February (91%).
The months with the lowest relative humidity are July and August (87%).

Average rainfall in January
Grytviken, South Georgia and the South Sandwich Islands

Average rainfall in January - Grytviken, South Georgia and the South Sandwich Islands
  • Average rainfall in January: 112mm

The wettest month (with the highest rainfall) is April (114mm).
The driest month (with the least rainfall) is October (82mm).

Average rainfall days in January
Grytviken, South Georgia and the South Sandwich Islands

Average rainfall days in January - Grytviken, South Georgia and the South Sandwich Islands
  • Average rainfall days in January: 20.4 days

The month with the highest number of rainy days is March (20.5 days).
The month with the least rainy days is August (7.8 days).

Average snowfall in January
Grytviken, South Georgia and the South Sandwich Islands

Average snowfall in January - Grytviken, South Georgia and the South Sandwich Islands
  • Average snowfall in January: 208mm

The month with the highest snowfall is August (421mm).
The month with the least snowfall is March (125mm).

Average snowfall days in January
Grytviken, South Georgia and the South Sandwich Islands

Average snowfall days in January - Grytviken, South Georgia and the South Sandwich Islands
  • Average snowfall days in January: 15.7 days

The month with the highest number of snowfall days is August (19 days).
The month with the least snowfall days is February (11.7 days).

Average sea temperature in January
Grytviken, South Georgia and the South Sandwich Islands

Average sea temperature in January - Grytviken, South Georgia and the South Sandwich Islands
  • Average sea temperature in January: 3°C

The best months for swimming (with the highest average sea temperature) are January, February, March and April (3°C).
The coldest months (with the lowest average sea temperature) are August, September and October (0°C).

Average daylight in January /
Average sunshine in January
Grytviken, South Georgia and the South Sandwich Islands

Average daylight in January / Average sunshine in January - Grytviken, South Georgia and the South Sandwich Islands
  • Average daylight in January: 16h and 3min

The month with the longest days is December (Average daylight: 17h and 6min).
The month with the shortest days is June (Average daylight: 7h and 24min).

  • Average sunshine in January: 4h and 4min

The month with the most sunshine is October (Average sunshine: 5h and 48min).
The month with the least sunshine is August (Average sunshine: 3h and 0min).

Average sunshine days in January
Grytviken, South Georgia and the South Sandwich Islands

Average sunshine days in January - Grytviken, South Georgia and the South Sandwich Islands
  • Average sunshine days in January: 1.1 days

The months with the most sunshine days are September and November (4 days).
The month with the least sunshine days is January (1.1 days).

Average UV index in January
Grytviken, South Georgia and the South Sandwich Islands

Average UV index in January - Grytviken, South Georgia and the South Sandwich Islands
  • Average UV index in January: 1

The months with the highest UV index are January, February, March, April, May, June, July, August, September, October, November and December (UV index 1).
The months with the lowest UV index are January, February, March, April, May, June, July, August, September, October, November and December (UV index 1).

Average cloud cover in January
Grytviken, South Georgia and the South Sandwich Islands

Average cloud cover in January - Grytviken, South Georgia and the South Sandwich Islands
  • Average cloud cover in January: 73

The month with the most cloud cover is January (Cloud cover 73).
The month with the least cloud cover is October (Cloud cover 66).

Average visibility in January
Grytviken, South Georgia and the South Sandwich Islands

Average visibility in January - Grytviken, South Georgia and the South Sandwich Islands
  • Average visibility in January: 8km

The months with the highest visibility are January, February, March, April, May, June, October, November and December (8km).
The months with the lowest visibility are July, August and September (7km).

Grytviken, South Georgia and the South Sandwich Islands

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