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December Weather in Gwangju South Korea

Daily high temperatures decrease by 8°F, from 50°F to 41°F, rarely falling below 32°F or exceeding 59°F.

Daily low temperatures decrease by 7°F, from 31°F to 25°F, rarely falling below 17°F or exceeding 41°F.

For reference, on August 4, the hottest day of the year, temperatures in Gwangju typically range from 74°F to 88°F, while on January 19, the coldest day of the year, they range from 24°F to 40°F.

Average High and Low Temperature in December in Gwangju

Average High and Low Temperature in December in GwangjuDec112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313115°F15°F20°F20°F25°F25°F30°F30°F35°F35°F40°F40°F45°F45°F50°F50°F55°F55°F60°F60°F65°F65°F70°F70°F75°F75°FNovJanDec 150°FDec 150°F31°F31°FDec 3141°FDec 3141°F25°F25°FDec 1146°FDec 1146°F29°F29°FDec 2143°FDec 2143°F26°F26°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 temperatures for the quarter of the year centered on December. 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 December in Gwangju

Average Hourly Temperature in December in GwangjuDec112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 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 AMNovJanfreezingfreezingvery coldcoldcoldcool
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.

Overland Park, Kansas, United States (6,675 miles away) is the far-away foreign place with temperatures most similar to Gwangju (view comparison).

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The month of December in Gwangju experiences gradually increasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy increasing from 38% to 43%.

The clearest day of the month is December 1, with clear, mostly clear, or partly cloudy conditions 62% of the time.

For reference, on July 2, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 64%, while on October 22, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 70%.

Cloud Cover Categories in December in Gwangju

Cloud Cover Categories in December in GwangjuDec11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%NovJanDec 162%Dec 162%Dec 3157%Dec 3157%Dec 1161%Dec 1161%Dec 2160%Dec 2160%clearmostly clearpartly cloudymostly cloudyovercast
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 Gwangju, the chance of a wet day over the course of December is rapidly decreasing, starting the month at 16% and ending it at 9%.

For reference, the year's highest daily chance of a wet day is 50% on July 8, and its lowest chance is 9% on January 1.

Over the course of December in Gwangju, the chance of a day with only rain decreases from 14% to 7%, the chance of a day with mixed snow and rain remains an essentially constant 1% throughout, and the chance of a day with only snow remains an essentially constant 1% throughout.

Probability of Precipitation in December in Gwangju

Probability of Precipitation in December in GwangjuDec11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%0%2%2%4%4%6%6%8%8%10%10%12%12%14%14%16%16%18%18%20%20%NovJanDec 116%Dec 116%Dec 319%Dec 319%Dec 1113%Dec 1113%Dec 2110%Dec 2110%snowmixedrain
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 December in Gwangju is decreasing, starting the month at 1.4 inches, when it rarely exceeds 2.9 inches or falls below 0.2 inches, and ending the month at 0.7 inches, when it rarely exceeds 1.7 inches.

The lowest average 31-day accumulation is 0.7 inches on December 31.

Average Monthly Rainfall in December in Gwangju

Average Monthly Rainfall in December in GwangjuDec11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310.0 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 inNovJanDec 310.7 inDec 310.7 inDec 11.4 inDec 11.4 inDec 111.1 inDec 111.1 inDec 210.8 inDec 210.8 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.

Snowfall

As with rainfall, we consider the snowfall accumulated over a sliding 31-day period centered around each day.

The average sliding 31-day snowfall during December in Gwangju is gradually increasing, starting the month at 0.7 inches, when it rarely exceeds 2.6 inches or falls below -0.0 inches, and ending the month at 1.1 inches, when it rarely exceeds 2.8 inches or falls below -0.0 inches.

Average Monthly Snowfall in December in Gwangju

Average Monthly Snowfall in December in GwangjuDec11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310.0 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 inNovJanDec 10.7 inDec 10.7 inDec 311.1 inDec 311.1 inDec 110.9 inDec 110.9 inDec 211.0 inDec 211.0 in
The average snowfall (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 rainfall.

Over the course of December in Gwangju, the length of the day is essentially constant. The shortest day of the month is December 22, with 9 hours, 47 minutes of daylight and the longest day is December 1, with 9 hours, 59 minutes of daylight.

Hours of Daylight and Twilight in December in Gwangju

Hours of Daylight and Twilight in December in GwangjuDec11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hrNovJanDec 229 hr, 47 minDec 229 hr, 47 minnightnightdaydayDec 19 hr, 59 minDec 19 hr, 59 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 month in Gwangju is 7:21 AM on December 1 and the latest sunrise is 19 minutes later at 7:40 AM on December 31.

The earliest sunset is 5:20 PM on December 6 and the latest sunset is 10 minutes later at 5:29 PM on December 31.

Daylight saving time is not observed in Gwangju during 2023.

For reference, on June 21, the longest day of the year, the Sun rises at 5:18 AM and sets 14 hours, 32 minutes later, at 7:49 PM, while on December 22, the shortest day of the year, it rises at 7:36 AM and sets 9 hours, 47 minutes later, at 5:24 PM.

Sunrise & Sunset with Twilight in December in Gwangju

Sunrise & Sunset with Twilight in December in GwangjuDec11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031312 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMNovJan7:21 AM7:21 AMDec 15:20 PMDec 15:20 PM7:40 AM7:40 AMDec 315:29 PMDec 315:29 PM7:33 AM7:33 AMDec 165:21 PMDec 165:21 PMSolarMidnightSolarMidnightSolarNoonSunriseSunset
The solar day over the course of December. 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 December in Gwangju

Solar Elevation and Azimuth in December in GwangjuDec112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 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 AMNovJan001010202020303000010102020303030
northeastsouthwest
Solar elevation and azimuth over the course of December 2023. 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 December 2023. 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 December in Gwangju

Moon Rise, Set & Phases in December in GwangjuDec112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMNovJanNov 136:28 PMNov 136:28 PMNov 276:17 PMNov 276:17 PMDec 138:33 AMDec 138:33 AMDec 279:34 AMDec 279:34 AMJan 118:58 PMJan 118:58 PMJan 262:55 AMJan 262:55 AM6:43 AM6:43 AM5:12 PM5:12 PM5:00 PM5:00 PM8:09 AM8:09 AM7:48 AM7:48 AM5:18 PM5:18 PM4:27 PM4:27 PM7:58 AM7:58 AM7:36 AM7:36 AM5:09 PM5:09 PM5:14 PM5:14 PM8:08 AM8:08 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.
Dec 2023IlluminationMoonriseMoonsetMoonriseMeridian PassingDistance
1
88%-10:58 AMWNW8:36 PMENE3:19 AMS245,450 mi
2
81%-11:38 AMWNW9:38 PMENE4:10 AMS247,875 mi
3
72%-12:11 PMWNW10:37 PMENE4:58 AMS249,749 mi
4
63%-12:40 PMWNW11:36 PMENE5:42 AMS250,908 mi
5
50%-1:05 PMWNW-6:23 AMS251,244 mi
6
44%12:32 AME1:28 PMW-7:03 AMS250,717 mi
7
34%1:29 AME1:51 PMW-7:42 AMS249,355 mi
8
25%2:26 AME2:15 PMW-8:21 AMS247,254 mi
9
17%3:24 AMESE2:40 PMWSW-9:03 AMS244,575 mi
10
10%4:26 AMESE3:09 PMWSW-9:48 AMS241,530 mi
11
4%5:31 AMESE3:44 PMWSW-10:37 AMS238,367 mi
12
1%6:39 AMESE4:26 PMWSW-11:32 AMS235,349 mi
13
0%7:48 AMSE5:18 PMSW-12:33 PMS232,720 mi
14
2%8:53 AMSE6:20 PMSW-1:37 PMS230,673 mi
15
7%9:51 AMESE7:30 PMWSW-2:41 PMS229,320 mi
16
14%10:40 AMESE8:44 PMWSW-3:42 PMS228,677 mi
17
23%11:21 AMESE9:57 PMWSW-4:39 PMS228,678 mi
18
34%11:55 AMESE11:08 PMWSW-5:31 PMS229,210 mi
19
46%12:25 PME--6:20 PMS230,147 mi
20
50%-12:17 AMW12:53 PME7:06 PMS231,380 mi
21
68%-1:24 AMW1:20 PME7:53 PMS232,833 mi
22
79%-2:31 AMWNW1:49 PMENE8:40 PMS234,465 mi
23
87%-3:38 AMWNW2:20 PMENE9:29 PMS236,266 mi
24
94%-4:46 AMWNW2:56 PMENE10:22 PMS238,233 mi
25
98%-5:54 AMWNW3:38 PMENE11:16 PMS240,352 mi
26
99%-6:59 AMNW4:27 PMNE--
27
100%-7:58 AMNW5:23 PMNE12:12 AMS242,581 mi
28
100%-8:50 AMNW6:23 PMENE1:08 AMS244,837 mi
29
97%-9:33 AMWNW7:24 PMENE2:01 AMS246,996 mi
30
93%-10:09 AMWNW8:25 PMENE2:50 AMS248,908 mi
31
87%-10:40 AMWNW9:25 PMENE3:36 AMS250,410 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 Gwangju is essentially constant during December, remaining around 0% throughout.

For reference, on August 2, the muggiest day of the year, there are muggy conditions 96% of the time, while on January 1, the least muggy day of the year, there are muggy conditions 0% of the time.

Humidity Comfort Levels in December in Gwangju

Humidity Comfort Levels in December in GwangjuDec11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%NovJanDec 10%Dec 10%Dec 310%Dec 310%Dec 110%Dec 110%Dec 210%Dec 210%drydrycomfortablecomfortable
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 Gwangju is gradually increasing during December, increasing from 8.6 miles per hour to 9.3 miles per hour over the course of the month.

For reference, on January 18, the windiest day of the year, the daily average wind speed is 9.6 miles per hour, while on September 18, the calmest day of the year, the daily average wind speed is 6.7 miles per hour.

Average Wind Speed in December in Gwangju

Average Wind Speed in December in GwangjuDec11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310 mph0 mph2 mph2 mph4 mph4 mph6 mph6 mph8 mph8 mph10 mph10 mph12 mph12 mph14 mph14 mph16 mph16 mphNovJanDec 18.6 mphDec 18.6 mphDec 319.3 mphDec 319.3 mphDec 169.0 mphDec 169.0 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 Gwangju throughout December is predominantly from the north, with a peak proportion of 65% on December 31.

Wind Direction in December in Gwangju

Wind Direction in December in GwangjuDec11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%100%20%80%40%60%60%40%80%20%100%0%NovJaneastnorthwestsouth
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).

Gwangju 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 Gwangju is decreasing during December, falling by 4°F, from 58°F to 53°F, over the course of the month.

Average Water Temperature in December in Gwangju

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 Gwangju typically lasts for 7.0 months (215 days), from around April 4 to around November 5, rarely starting before March 18 or after April 21, and rarely ending before October 19 or after November 21.

The month of December in Gwangju is reliably fully outside of the growing season.

Time Spent in Various Temperature Bands and the Growing Season in December in Gwangju

Time Spent in Various Temperature Bands and the Growing Season in December in GwangjuDec11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%NovJan-0%Dec 16-0%Dec 1650%Nov 550%Nov 5Nov 2110%Nov 2110%freezingvery coldcoldcoolcomfortable
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 Gwangju are essentially constant during December, remaining within 4°F of 4,140°F throughout.

Growing Degree Days in December in Gwangju

The average growing degree days accumulated over the course of December, 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 Gwangju is essentially constant during December, remaining within 0.1 kWh of 2.5 kWh throughout.

The lowest average daily incident shortwave solar energy during December is 2.4 kWh on December 25.

Average Daily Incident Shortwave Solar Energy in December in Gwangju

Average Daily Incident Shortwave Solar Energy in December in GwangjuDec11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310.0 kWh0.0 kWh0.5 kWh0.5 kWh1.0 kWh1.0 kWh1.5 kWh1.5 kWh2.0 kWh2.0 kWh2.5 kWh2.5 kWh3.0 kWh3.0 kWh3.5 kWh3.5 kWh4.0 kWh4.0 kWh4.5 kWh4.5 kWhNovJanDec 252.4 kWhDec 252.4 kWhDec 12.6 kWhDec 12.6 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 Gwangju are 35.155 deg latitude, 126.916 deg longitude, and 154 ft elevation.

The topography within 2 miles of Gwangju contains very significant variations in elevation, with a maximum elevation change of 1,070 feet and an average elevation above sea level of 222 feet. Within 10 miles contains very significant variations in elevation (3,845 feet). Within 50 miles also contains extreme variations in elevation (6,211 feet).

The area within 2 miles of Gwangju is covered by sparse vegetation (47%) and artificial surfaces (39%), within 10 miles by trees (34%) and sparse vegetation (31%), and within 50 miles by trees (32%) and water (23%).

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

Temperature and Dew Point

There are 3 weather stations near enough to contribute to our estimation of the temperature and dew point in Gwangju.

For each station, the records are corrected for the elevation difference between that station and Gwangju according to the International Standard Atmosphere , and by the relative change present in the MERRA-2 satellite-era reanalysis between the two locations.

The estimated value at Gwangju is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Gwangju and a given station.

The stations contributing to this reconstruction are:

  • Kwangju Ab (RKJJ, 93%, 6 mi, west, -118 ft elevation change)
  • Gunsan Airport (RKJK, 3.9%, 55 mi, north, -121 ft elevation change)
  • Sacheon Airport (RKPS, 3.0%, 66 mi, east, -128 ft elevation change)

To get a sense of how much these sources agree with each other, you can view a comparison of Gwangju and the stations that contribute to our estimates of its temperature history and climate. Please note that each source's contribution is adjusted for elevation and the relative change present in the MERRA-2 data.

Other Data

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.

All other weather data, including cloud cover, precipitation, wind speed and direction, and solar flux, come from NASA's MERRA-2 Modern-Era Retrospective Analysis . 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.

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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