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Winter Weather in U.S. Virgin Islands U.S. Virgin Islands

Daily high temperatures are around 84°F, rarely falling below 80°F or exceeding 88°F. The lowest daily average high temperature is 83°F on January 22.

Daily low temperatures are around 75°F, rarely falling below 71°F or exceeding 78°F. The lowest daily average low temperature is 74°F on January 23.

For reference, on August 5, the hottest day of the year, temperatures in U.S. Virgin Islands typically range from 79°F to 89°F, while on January 21, the coldest day of the year, they range from 74°F to 83°F.

Average High and Low Temperature in the Winter in U.S. Virgin Islands

Average High and Low Temperature in the Winter in U.S. Virgin IslandsDecJanFeb70°F70°F75°F75°F80°F80°F85°F85°F90°F90°F95°F95°FFallSpringJan 2083°FJan 2083°F74°F74°FDec 185°FDec 185°F76°F76°FFeb 2884°FFeb 2884°F74°F74°FJan 184°FJan 184°F74°F74°FFeb 183°FFeb 183°F74°F74°F
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 winter temperatures. 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 the Winter in U.S. Virgin Islands

Average Hourly Temperature in the Winter in U.S. Virgin IslandsDecJanFeb12 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 AMFallSpringcomfortablewarmhot
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.
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The winter in U.S. Virgin Islands experiences rapidly decreasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy decreasing from 33% to 20%. The lowest chance of overcast or mostly cloudy conditions is 17% on January 11.

The clearest day of the winter is January 11, with clear, mostly clear, or partly cloudy conditions 83% of the time.

For reference, on May 29, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 72%, while on January 11, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 83%.

Cloud Cover Categories in the Winter in U.S. Virgin Islands

Cloud Cover Categories in the Winter in U.S. Virgin IslandsDecJanFeb0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%FallSpringMay 2928%May 2928%Dec 167%Dec 167%Feb 2880%Feb 2880%Jan 180%Jan 180%Feb 181%Feb 181%clearmostly clearpartly cloudyovercastmostly cloudy
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 U.S. Virgin Islands, the chance of a wet day over the course of the winter is very rapidly decreasing, starting the season at 25% and ending it at 12%.

For reference, the year's highest daily chance of a wet day is 39% on September 19, and its lowest chance is 12% on March 8.

Probability of Precipitation in the Winter in U.S. Virgin Islands

Probability of Precipitation in the Winter in U.S. Virgin IslandsDecJanFeb0%0%5%5%10%10%15%15%20%20%25%25%30%30%35%35%40%40%FallSpringDec 125%Dec 125%Feb 2812%Feb 2812%Jan 116%Jan 116%Feb 114%Feb 114%rain
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 season and not just the monthly totals, we show the rainfall accumulated over a sliding 31-day period centered around each day.

The average sliding 31-day rainfall during the winter in U.S. Virgin Islands is rapidly decreasing, starting the season at 2.3 inches, when it rarely exceeds 5.2 inches or falls below 0.4 inches, and ending the season at 0.7 inches, when it rarely exceeds 1.7 inches.

Average Monthly Rainfall in the Winter in U.S. Virgin Islands

Average Monthly Rainfall in the Winter in U.S. Virgin IslandsDecJanFeb0 in0 in1 in1 in2 in2 in3 in3 in4 in4 in5 in5 in6 in6 in7 in7 in8 in8 inFallSpringDec 12.3 inDec 12.3 inFeb 280.7 inFeb 280.7 inJan 11.1 inJan 11.1 inFeb 10.7 inFeb 10.7 in
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 the winter in U.S. Virgin Islands, the length of the day is increasing. From the start to the end of the season, the length of the day increases by 40 minutes, implying an average daily increase of 27 seconds, and weekly increase of 3 minutes, 9 seconds.

The shortest day of the winter is December 21, with 11 hours, 2 minutes of daylight and the longest day is February 28, with 11 hours, 46 minutes of daylight.

Hours of Daylight and Twilight in the Winter in U.S. Virgin Islands

Hours of Daylight and Twilight in the Winter in U.S. Virgin IslandsDecJanFeb0 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hrFallSpringDec 2111 hr, 2 minDec 2111 hr, 2 minnightnightdaydayFeb 2811 hr, 46 minFeb 2811 hr, 46 minFeb 111 hr, 21 minFeb 111 hr, 21 min
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 winter in U.S. Virgin Islands is 6:35 AM on December 1 and the latest sunrise is 19 minutes later at 6:55 AM on January 18.

The earliest sunset is 5:42 PM on December 1 and the latest sunset is 43 minutes later at 6:25 PM on February 28.

Daylight saving time is not observed in U.S. Virgin Islands during 2024.

For reference, on June 20, the longest day of the year, the Sun rises at 5:44 AM and sets 13 hours, 14 minutes later, at 6:58 PM, while on December 21, the shortest day of the year, it rises at 6:47 AM and sets 11 hours, 2 minutes later, at 5:49 PM.

Sunrise & Sunset with Twilight in the Winter in U.S. Virgin Islands

Sunrise & Sunset with Twilight in the Winter in U.S. Virgin IslandsDecJanFeb2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMFallSpring6:35 AM6:35 AMDec 15:42 PMDec 15:42 PM6:39 AM6:39 AMFeb 286:25 PMFeb 286:25 PM6:55 AM6:55 AMJan 186:06 PMJan 186:06 PM6:52 AM6:52 AMJan 15:55 PMJan 15:55 PMSolarMidnightSolarMidnightSolarNoonSunriseSunset
The solar day in the winter. 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 the Winter in U.S. Virgin Islands

Solar Elevation and Azimuth in the Winter in U.S. Virgin IslandsDecJanFeb12 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 AMFallSpring001020203030405000101020303040405060
northeastsouthwest
Solar elevation and azimuth in the the winter of 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 the winter of 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 the Winter in U.S. Virgin Islands

Moon Rise, Set & Phases in the Winter in U.S. Virgin IslandsDecJanFeb12 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMFallSpringNov 18:48 AMNov 18:48 AMNov 155:29 PMNov 155:29 PMDec 12:22 AMDec 12:22 AMDec 155:02 AMDec 155:02 AMDec 306:28 PMDec 306:28 PMJan 136:28 PMJan 136:28 PMJan 298:37 AMJan 298:37 AMFeb 129:54 AMFeb 129:54 AMFeb 278:45 PMFeb 278:45 PMMar 142:55 AMMar 142:55 AMMar 296:58 AMMar 296:58 AM5:49 PM5:49 PM5:28 PM5:28 PM7:09 AM7:09 AM5:59 PM5:59 PM5:04 PM5:04 PM7:00 AM7:00 AM6:38 AM6:38 AM5:42 PM5:42 PM5:54 PM5:54 PM7:35 AM7:35 AM6:32 PM6:32 PM5:40 PM5:40 PM6:55 AM6:55 AM6:23 AM6:23 AM6:16 PM6:16 PM6:08 PM6:08 PM6:37 AM6:37 AM6:58 PM6:58 PM
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.

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 U.S. Virgin Islands is rapidly decreasing during the winter, falling from 89% to 71% over the course of the season.

For reference, on July 31, the muggiest day of the year, there are muggy conditions 100% of the time, while on March 1, the least muggy day of the year, there are muggy conditions 71% of the time.

Humidity Comfort Levels in the Winter in U.S. Virgin Islands

Humidity Comfort Levels in the Winter in U.S. Virgin IslandsDecJanFeb0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%FallSpringDec 189%Dec 189%Feb 2871%Feb 2871%Jan 184%Jan 184%Feb 176%Feb 176%miserablemiserableoppressiveoppressivemuggymuggyhumidhumidcomfortablecomfortable
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 U.S. Virgin Islands is essentially constant during the winter, remaining within 0.4 miles per hour of 15.0 miles per hour throughout.

For reference, on July 13, the windiest day of the year, the daily average wind speed is 16.0 miles per hour, while on October 9, the calmest day of the year, the daily average wind speed is 11.8 miles per hour.

The highest daily average wind speed during the winter is 15.4 miles per hour on December 30.

Average Wind Speed in the Winter in U.S. Virgin Islands

Average Wind Speed in the Winter in U.S. Virgin IslandsDecJanFeb0 mph0 mph5 mph5 mph10 mph10 mph15 mph15 mph20 mph20 mphFallSpringDec 3015.4 mphDec 3015.4 mphDec 114.6 mphDec 114.6 mphFeb 2814.8 mphFeb 2814.8 mphFeb 115.0 mphFeb 115.0 mph
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 U.S. Virgin Islands throughout the winter is predominantly from the east, with a peak proportion of 90% on January 16.

Wind Direction in the Winter in U.S. Virgin Islands

Wind Direction in the Winter in U.S. Virgin IslandsDecJanFeb0%100%20%80%40%60%60%40%80%20%100%0%FallSpringeastsouthnorth
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).

U.S. Virgin Islands 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 U.S. Virgin Islands is gradually decreasing during the winter, falling by 3°F, from 82°F to 79°F, over the course of the season.

Average Water Temperature in the Winter in U.S. Virgin Islands

Average Water Temperature in the Winter in U.S. Virgin IslandsDecJanFeb77°F77°F78°F78°F79°F79°F80°F80°F81°F81°F82°F82°F83°F83°F84°F84°F85°F85°FFallSpringDec 182°FDec 182°FFeb 2879°FFeb 2879°FJan 180°FJan 180°FFeb 179°FFeb 179°F
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).

Temperatures in U.S. Virgin Islands are sufficiently warm year round that it is not entirely meaningful to discuss the growing season in these terms. We nevertheless include the chart below as an illustration of the distribution of temperatures experienced throughout the year.

Time Spent in Various Temperature Bands and the Growing Season in the Winter in U.S. Virgin Islands

Time Spent in Various Temperature Bands and the Growing Season in the Winter in U.S. Virgin IslandsDecJanFeb0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%FallSpring100%Jan 15100%Jan 15comfortablewarmhot
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 U.S. Virgin Islands are very rapidly decreasing during the winter, decreasing by 8,701°F, from 10,303°F to 1,602°F, over the course of the season.

Growing Degree Days in the Winter in U.S. Virgin Islands

Growing Degree Days in the Winter in U.S. Virgin IslandsDecJanFeb2,000°F2,000°F4,000°F4,000°F6,000°F6,000°F8,000°F8,000°F10,000°F10,000°FFallSpringDec 110,303°FDec 110,303°FFeb 281,602°FFeb 281,602°F
The average growing degree days accumulated over the course of the winter, 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 U.S. Virgin Islands is rapidly increasing during the winter, rising by 1.6 kWh, from 4.8 kWh to 6.4 kWh, over the course of the season.

Average Daily Incident Shortwave Solar Energy in the Winter in U.S. Virgin Islands

Average Daily Incident Shortwave Solar Energy in the Winter in U.S. Virgin IslandsDecJanFeb0 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWh8 kWh8 kWhFallSpringDec 14.8 kWhDec 14.8 kWhFeb 286.4 kWhFeb 286.4 kWhJan 14.9 kWhJan 14.9 kWhFeb 15.6 kWhFeb 15.6 kWh
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 U.S. Virgin Islands are 18.348 deg latitude, -64.983 deg longitude, and 0 ft elevation.

The topography within 2 miles of U.S. Virgin Islands is essentially flat, with a maximum elevation change of 0 feet and an average elevation above sea level of 0 feet. Within 10 miles is also essentially flat (0 feet). Within 50 miles is also essentially flat (0 feet).

The area within 2 miles of U.S. Virgin Islands is covered by water (44%), trees (27%), and grassland (20%), within 10 miles by water (91%), and within 50 miles by water (96%).

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

The details of the data sources used for this report can be found on the Cyril E. King Airport page.

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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