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January Weather in Grytviken South Georgia & South Sandwich Islands

Daily high temperatures are around 39°F, rarely falling below 35°F or exceeding 42°F.

Daily low temperatures are around 35°F, rarely falling below 32°F or exceeding 38°F.

For reference, on February 24, the hottest day of the year, temperatures in Grytviken typically range from 36°F to 40°F, while on July 23, the coldest day of the year, they range from 26°F to 31°F.

Average High and Low Temperature in January in Grytviken

Average High and Low Temperature in January in GrytvikenJan112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313120°F20°F22°F22°F24°F24°F26°F26°F28°F28°F30°F30°F32°F32°F34°F34°F36°F36°F38°F38°F40°F40°F42°F42°F44°F44°FDecFebJan 138°FJan 138°F35°F35°FJan 3139°FJan 3139°F36°F36°FJan 1139°FJan 1139°F35°F35°FJan 2139°FJan 2139°F36°F36°FNowNow
The daily average high (red line) and low (blue line) temperature, with 25th to 75th and 10th to 90th percentile bands. The thin dotted lines are the corresponding average perceived temperatures.

The figure below shows you a compact characterization of the hourly average temperatures for the quarter of the year centered on January. The horizontal axis is the day, the vertical axis is the hour of the day, and the color is the average temperature for that hour and day.

Average Hourly Temperature in January in Grytviken

Average Hourly Temperature in January in GrytvikenJan112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 AM12 AM2 AM2 AM4 AM4 AM6 AM6 AM8 AM8 AM10 AM10 AM12 PM12 PM2 PM2 PM4 PM4 PM6 PM6 PM8 PM8 PM10 PM10 PM12 AM12 AMDecFebNowNowvery cold
frigid 15°F freezing 32°F very cold 45°F cold 55°F cool 65°F comfortable 75°F warm 85°F hot 95°F sweltering
The average hourly temperature, color coded into bands. The shaded overlays indicate night and civil twilight.

Nanortalik, Greenland (7,929 miles away) is the far-away foreign place with temperatures most similar to Grytviken (view comparison).

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The month of January in Grytviken experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 67% throughout the month.

The clearest day of the month is January 1, with clear, mostly clear, or partly cloudy conditions 35% of the time.

For reference, on June 20, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 79%, while on December 15, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 37%.

Cloud Cover Categories in January in Grytviken

Cloud Cover Categories in January in GrytvikenJan11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%DecFebJan 135%Jan 135%Jan 3132%Jan 3132%Jan 1134%Jan 1134%Jan 2132%Jan 2132%NowNowmostly clearpartly cloudymostly cloudyovercastclear
0% clear 20% mostly clear 40% partly cloudy 60% mostly cloudy 80% overcast 100%
The percentage of time spent in each cloud cover band, categorized by the percentage of the sky covered by clouds.

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Grytviken, the chance of a wet day over the course of January is gradually increasing, starting the month at 40% and ending it at 42%.

For reference, the year's highest daily chance of a wet day is 44% on January 26, and its lowest chance is 21% on October 4.

Probability of Precipitation in January in Grytviken

Probability of Precipitation in January in GrytvikenJan11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%0%5%5%10%10%15%15%20%20%25%25%30%30%35%35%40%40%45%45%DecFebJan 2644%Jan 2644%Jan 140%Jan 140%Jan 1140%Jan 1140%NowNowrainmixed
The percentage of days in which various types of precipitation are observed, excluding trace quantities: rain alone, snow alone, and mixed (both rain and snow fell in the same day).

Rainfall

To show variation within the month and not just the monthly total, we show the rainfall accumulated over a sliding 31-day period centered around each day.

The average sliding 31-day rainfall during January in Grytviken is increasing, starting the month at 2.1 inches, when it rarely exceeds 3.0 inches or falls below 1.3 inches, and ending the month at 2.8 inches, when it rarely exceeds 3.8 inches or falls below 1.8 inches.

Average Monthly Rainfall in January in Grytviken

Average Monthly Rainfall in January in GrytvikenJan11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310.0 in0.0 in0.5 in0.5 in1.0 in1.0 in1.5 in1.5 in2.0 in2.0 in2.5 in2.5 in3.0 in3.0 in3.5 in3.5 in4.0 in4.0 inDecFebJan 12.1 inJan 12.1 inJan 312.8 inJan 312.8 inJan 112.4 inJan 112.4 inJan 212.6 inJan 212.6 inNowNow
The average rainfall (solid line) accumulated over the course of a sliding 31-day period centered on the day in question, with 25th to 75th and 10th to 90th percentile bands. The thin dotted line is the corresponding average snowfall.

Over the course of January in Grytviken, the length of the day is rapidly decreasing. From the start to the end of the month, the length of the day decreases by 1 hour, 25 minutes, implying an average daily decrease of 2 minutes, 50 seconds, and weekly decrease of 19 minutes, 52 seconds.

The shortest day of the month is January 31, with 15 hours, 40 minutes of daylight and the longest day is January 1, with 17 hours, 6 minutes of daylight.

Hours of Daylight and Twilight in January in Grytviken

Hours of Daylight and Twilight in January in GrytvikenJan11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hrDecFebdaydaydaydaynightJan 117 hr, 6 minJan 117 hr, 6 minJan 3115 hr, 40 minJan 3115 hr, 40 minNowNow
The number of hours during which the Sun is visible (black line). From bottom (most yellow) to top (most gray), the color bands indicate: full daylight, twilight (civil, nautical, and astronomical), and full night.

The earliest sunrise of the month in Grytviken is 3:56 AM on January 1 and the latest sunrise is 52 minutes later at 4:48 AM on January 31.

The latest sunset is 9:01 PM on January 1 and the earliest sunset is 33 minutes earlier at 8:28 PM on January 31.

Daylight saving time is not observed in Grytviken during 2024.

For reference, on December 21, the longest day of the year, the Sun rises at 3:48 AM and sets 17 hours, 13 minutes later, at 9:00 PM, while on June 20, the shortest day of the year, it rises at 8:48 AM and sets 7 hours, 19 minutes later, at 4:07 PM.

Sunrise & Sunset with Twilight in January in Grytviken

The solar day over the course of January. From bottom to top, the black lines are the previous solar midnight, sunrise, solar noon, sunset, and the next solar midnight. The day, twilights (civil, nautical, and astronomical), and night are indicated by the color bands from yellow to gray.

The figure below presents a compact representation of the sun's elevation (the angle of the sun above the horizon) and azimuth (its compass bearing) for every hour of every day in the reporting period. The horizontal axis is the day of the year and the vertical axis is the hour of the day. For a given day and hour of that day, the background color indicates the azimuth of the sun at that moment. The black isolines are contours of constant solar elevation.

Solar Elevation and Azimuth in January in Grytviken

Solar Elevation and Azimuth in January in GrytvikenJan112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 AM12 AM2 AM2 AM4 AM4 AM6 AM6 AM8 AM8 AM10 AM10 AM12 PM12 PM2 PM2 PM4 PM4 PM6 PM6 PM8 PM8 PM10 PM10 PM12 AM12 AMDecFeb0010102020203030404050500001010202030303040405050NowNow
northeastsouthwest
Solar elevation and azimuth over the course of January 2024. The black lines are lines of constant solar elevation (the angle of the sun above the horizon, in degrees). The background color fills indicate the azimuth (the compass bearing) of the sun. The lightly tinted areas at the boundaries of the cardinal compass points indicate the implied intermediate directions (northeast, southeast, southwest, and northwest).

The figure below presents a compact representation of key lunar data for January 2024. The horizontal axis is the day, the vertical axis is the hour of the day, and the colored areas indicate when the moon is above the horizon. The vertical gray bars (new Moons) and blue bars (full Moons) indicate key Moon phases. The label associated with each bar indicates the date and time that the phase is obtained, and the companion time labels indicate the rise and set times of the Moon for the nearest time interval in which the moon is above the horizon.

Moon Rise, Set & Phases in January in Grytviken

Moon Rise, Set & Phases in January in GrytvikenJan112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMDecFebDec 129:33 PMDec 129:33 PMDec 2610:34 PMDec 2610:34 PMJan 119:58 AMJan 119:58 AMJan 253:55 PMJan 253:55 PMFeb 99:00 PMFeb 99:00 PMFeb 2410:31 AMFeb 2410:31 AM2:47 AM2:47 AM9:22 PM9:22 PM9:37 PM9:37 PM3:16 AM3:16 AM9:52 PM9:52 PM9:17 PM9:17 PM4:54 AM4:54 AM3:46 AM3:46 AM8:37 PM8:37 PM7:51 PM7:51 PM5:15 AM5:15 AM
The time in which the moon is above the horizon (light blue area), with new moons (dark gray lines) and full moons (blue lines) indicated. The shaded overlays indicate night and civil twilight.
Jan 2024IlluminationMoonriseMoonsetMoonriseMeridian PassingDistance
1
76%-9:43 AMWNW11:42 PMENE4:38 AMN251,551 mi
2
67%-10:56 AMW11:49 PME5:17 AMN251,437 mi
3
58%-12:09 PMW11:56 PME5:56 AMN250,507 mi
4
50%-1:23 PMWSW-6:35 AMN248,751 mi
5
38%12:04 AMESE2:40 PMWSW-7:16 AMN246,226 mi
6
29%12:13 AMESE4:02 PMWSW-7:59 AMN243,064 mi
7
19%12:26 AMSE5:27 PMSW-8:47 AMN239,470 mi
8
11%12:44 AMSE6:54 PMSW-9:40 AMN235,716 mi
9
5%1:14 AMSE8:12 PMSW-10:38 AMN232,124 mi
10
1%2:03 AMSE9:12 PMSW-11:40 AMN229,028 mi
11
0%3:16 AMSE9:52 PMSW-12:42 PMN226,721 mi
12
2%4:47 AMSE10:17 PMSW-1:43 PMN225,401 mi
13
7%6:26 AMSE10:33 PMWSW-2:39 PMN225,131 mi
14
14%8:04 AMESE10:45 PMWSW-3:32 PMN225,845 mi
15
24%9:38 AME10:55 PMW-4:21 PMN227,373 mi
16
35%11:08 AME11:04 PMW-5:09 PMN229,492 mi
17
46%12:37 PMENE11:13 PMWNW-5:57 PMN231,971 mi
18
50%2:05 PMENE11:24 PMWNW-6:45 PMN234,605 mi
19
69%3:33 PMNE11:39 PMNW-7:36 PMN237,240 mi
20
78%5:01 PMNE--8:30 PMN239,775 mi
21
86%-12:00 AMNW6:22 PMNE9:27 PMN242,156 mi
22
93%-12:31 AMNW7:30 PMNE10:24 PMN244,357 mi
23
97%-1:18 AMNW8:21 PMNE11:21 PMN246,364 mi
24
99%-2:20 AMNW8:55 PMNE--
25
100%-3:35 AMNW9:17 PMNE12:15 AMN248,159 mi
26
100%-4:54 AMNW9:32 PMENE1:05 AMN249,704 mi
27
98%-6:12 AMWNW9:42 PMENE1:51 AMN250,940 mi
28
95%-7:28 AMWNW9:51 PMENE2:34 AMN251,782 mi
29
89%-8:42 AMW9:57 PME3:15 AMN252,134 mi
30
83%-9:55 AMW10:04 PME3:54 AMN251,896 mi
31
75%-11:08 AMW10:11 PMESE4:32 AMN250,981 mi

We base the humidity comfort level on the dew point, as it determines whether perspiration will evaporate from the skin, thereby cooling the body. Lower dew points feel drier and higher dew points feel more humid. Unlike temperature, which typically varies significantly between night and day, dew point tends to change more slowly, so while the temperature may drop at night, a muggy day is typically followed by a muggy night.

The chance that a given day will be muggy in Grytviken is essentially constant during January, remaining around 0% throughout.

Humidity Comfort Levels in January in Grytviken

Humidity Comfort Levels in January in GrytvikenJan11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%DecFebJan 10%Jan 10%Jan 310%Jan 310%Jan 110%Jan 110%Jan 210%Jan 210%NowNowdrydry
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
The percentage of time spent at various humidity comfort levels, categorized by dew point.

This section discusses the wide-area hourly average wind vector (speed and direction) at 10 meters above the ground. The wind experienced at any given location is highly dependent on local topography and other factors, and instantaneous wind speed and direction vary more widely than hourly averages.

The average hourly wind speed in Grytviken is essentially constant during January, remaining within 0.2 miles per hour of 17.4 miles per hour throughout.

For reference, on August 28, the windiest day of the year, the daily average wind speed is 20.3 miles per hour, while on December 21, the calmest day of the year, the daily average wind speed is 17.0 miles per hour.

Average Wind Speed in January in Grytviken

The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands.

The hourly average wind direction in Grytviken throughout January is predominantly from the west, with a peak proportion of 57% on January 31.

Wind Direction in January in Grytviken

Wind Direction in January in GrytvikenJan11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%100%20%80%40%60%60%40%80%20%100%0%DecFebNowNowwestnorthsoutheast
northeastsouthwest
The percentage of hours in which the mean wind direction is from each of the four cardinal wind directions, excluding hours in which the mean wind speed is less than 1.0 mph. The lightly tinted areas at the boundaries are the percentage of hours spent in the implied intermediate directions (northeast, southeast, southwest, and northwest).

Grytviken is located near a large body of water (e.g., ocean, sea, or large lake). This section reports on the wide-area average surface temperature of that water.

The average surface water temperature in Grytviken is essentially constant during January, remaining within 1°F of 37°F throughout.

Average Water Temperature in January in Grytviken

Average Water Temperature in January in GrytvikenJan112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313133°F33°F34°F34°F35°F35°F36°F36°F37°F37°F38°F38°F39°F39°F40°F40°FDecFebJan 137°FJan 137°FJan 3138°FJan 3138°FJan 1137°FJan 1137°FJan 2138°FJan 2138°FNowNow
The daily average water temperature (purple line), with 25th to 75th and 10th to 90th percentile bands.

Definitions of the growing season vary throughout the world, but for the purposes of this report, we define it as the longest continuous period of non-freezing temperatures (≥ 32°F) in the year (the calendar year in the Northern Hemisphere, or from July 1 until June 30 in the Southern Hemisphere).

The growing season in Grytviken typically lasts for 2.6 months (76 days), from around December 30 to around March 17, rarely starting before December 2, or ending after April 20.

The month of January in Grytviken is more likely than not fully within the growing season, with the chance that a given day is in the growing season rapidly increasing from 52% to 85% over the course of the month.

Time Spent in Various Temperature Bands and the Growing Season in January in Grytviken

Time Spent in Various Temperature Bands and the Growing Season in January in Grytvikengrowing seasongrowing seasonJan11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%DecFeb52%Jan 152%Jan 185%Jan 3185%Jan 3168%Jan 1168%Jan 1180%Jan 2180%Jan 21NowNowfreezingvery cold
frigid 15°F freezing 32°F very cold 45°F cold 55°F cool 65°F comfortable 75°F warm 85°F hot 95°F sweltering
The percentage of time spent in various temperature bands. The black line is the percentage chance that a given day is within the growing season.

Growing degree days are a measure of yearly heat accumulation used to predict plant and animal development, and defined as the integral of warmth above a base temperature, discarding any excess above a maximum temperature. In this report, we use a base of 50°F and a cap of 86°F.

The average accumulated growing degree days in Grytviken are essentially constant during January, remaining around 0°F throughout.

Growing Degree Days in January in Grytviken

Growing Degree Days in January in GrytvikenJan11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310.0°F0.0°F0.1°F0.1°F0.2°F0.2°F0.3°F0.3°F0.4°F0.4°F0.5°F0.5°F0.6°F0.6°F0.7°F0.7°F0.8°F0.8°F0.9°F0.9°F1.0°F1.0°FDecFebJan 10°FJan 10°FJan 310°FJan 310°FJan 110°FJan 110°FJan 210°FJan 210°FNowNow
The average growing degree days accumulated over the course of January, with 25th to 75th and 10th to 90th percentile bands.

This section discusses the total daily incident shortwave solar energy reaching the surface of the ground over a wide area, taking full account of seasonal variations in the length of the day, the elevation of the Sun above the horizon, and absorption by clouds and other atmospheric constituents. Shortwave radiation includes visible light and ultraviolet radiation.

The average daily incident shortwave solar energy in Grytviken is gradually decreasing during January, falling by 0.9 kWh, from 5.2 kWh to 4.3 kWh, over the course of the month.

Average Daily Incident Shortwave Solar Energy in January in Grytviken

Average Daily Incident Shortwave Solar Energy in January in GrytvikenJan11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWh8 kWh8 kWhDecFebJan 15.2 kWhJan 15.2 kWhJan 314.3 kWhJan 314.3 kWhJan 115.0 kWhJan 115.0 kWhJan 214.6 kWhJan 214.6 kWhNowNow
The average daily shortwave solar energy reaching the ground per square meter (orange line), with 25th to 75th and 10th to 90th percentile bands.

For the purposes of this report, the geographical coordinates of Grytviken are -54.281 deg latitude, -36.509 deg longitude, and 13 ft elevation.

The topography within 2 miles of Grytviken contains very significant variations in elevation, with a maximum elevation change of 1,926 feet and an average elevation above sea level of 570 feet. Within 10 miles contains very significant variations in elevation (7,513 feet). Within 50 miles also contains extreme variations in elevation (9,669 feet).

The area within 2 miles of Grytviken is covered by snow and glaciers (51%), water (24%), and shrubs (11%), within 10 miles by snow and glaciers (52%) and water (43%), and within 50 miles by water (83%) and snow and glaciers (16%).

This report illustrates the typical weather in Grytviken, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016.

Grytviken is further than 200 kilometers from the nearest reliable weather station, so the weather-related data on this page were taken entirely from NASA's MERRA-2 satellite-era reanalysis . This reanalysis combines a variety of wide-area measurements in a state-of-the-art global meteorological model to reconstruct the hourly history of weather throughout the world on a 50-kilometer grid.

The temperature and dew point estimates are corrected for the difference between the reference elevation of the MERRA-2 grid cell and the elevation of Grytviken, according to the International Standard Atmosphere .

All data relating to the Sun's position (e.g., sunrise and sunset) are computed using astronomical formulas from the book, Astronomical Algorithms 2nd Edition , by Jean Meeus.

Land Use data comes from the Global Land Cover SHARE database , published by the Food and Agriculture Organization of the United Nations.

Elevation data comes from the Shuttle Radar Topography Mission (SRTM) , published by NASA's Jet Propulsion Laboratory.

Names, locations, and time zones of places and some airports come from the GeoNames Geographical Database .

Time zones for airports and weather stations are provided by AskGeo.com .

Maps are © OpenStreetMap contributors.

Disclaimer

The information on this site is provided as is, without any assurances as to its accuracy or suitability for any purpose. Weather data is prone to errors, outages, and other defects. We assume no responsibility for any decisions made on the basis of the content presented on this site.

We draw particular cautious attention to our reliance on the MERRA-2 model-based reconstructions for a number of important data series. While having the tremendous advantages of temporal and spatial completeness, these reconstructions: (1) are based on computer models that may have model-based errors, (2) are coarsely sampled on a 50 km grid and are therefore unable to reconstruct the local variations of many microclimates, and (3) have particular difficulty with the weather in some coastal areas, especially small islands.

We further caution that our travel scores are only as good as the data that underpin them, that weather conditions at any given location and time are unpredictable and variable, and that the definition of the scores reflects a particular set of preferences that may not agree with those of any particular reader.

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