Heunghae weather in December

In December, Heunghae sees average daytime highs of 8°C and overnight lows near -0°C, with 24 mm of precipitation across 3.7 wet days and about 9.6 hours of daylight. It is the 10th-warmest and 12th-wettest month of the year here.

Highs ease over the month, from about 10°C in the first days to 6°C by the end. The sky is clear or mostly clear about 59% of the time in December, and the air most often feels dry.

Daylight stretches from about 9 h 42 min at the start of December to 9 h 36 min by month's end. Set against the rest of the year, December is Heunghae's 1st-clearest and 2nd-windiest month. For the whole year in context, see Heunghae's year-round climate.

Daytime high
10th warmest
Overnight low
-0°
3rd coldest
Precipitation
24 mm
3.7 wet days
Daylight
9 h 36 min
7:32 AM – 5:05 PM
Cloud cover
36%
1st clearest
Wind
14 km/h
2nd windiest
Solar energy
2.6 kWh/m²
Travel score
1.5
out of 10

Heunghae is human settlement in South Korea.

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 10°C in the first days to 6°C by the end.

A typical December day in Heunghae reaches about 8°C in the afternoon and slips back to -0°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 3°C and 12°C. Set against its neighbours, December runs about 6°C cooler than November and about 2°C warmer than January.

-10°-5°10°15°151015202531
Avg high (°C)Avg low (°C)
1102
2102
3102
492
591
691
791
891
981
1080
1180
1280
1380
1480
1580
1670
1770
187-1
197-1
207-1
217-1
227-1
237-1
247-1
257-1
266-1
276-1
286-1
296-1
306-2
316-2

How December really feels in Heunghae

Once humidity and wind are folded in, December averages 0 days that feel above 32°C and 31 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C
0
heat index over the day's high
Days feeling ≤ C
31
wind chill below the day's low

The story in December is cold — wind chill drags the overnight "feels like" below the raw low.

Heunghae weather by month

How December compares with the rest of the year at a glance. December is the 10th-warmest and 12th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -2°274.41.29.80.2
Feb / -1°334.51.210.61.2
Mar12° / 6170.911.73.4
Apr18° / 747.2012.96.0
May22° / 13°847.6013.97.1
Jun25° / 18°1208.5014.46.7
Jul28° / 23°19513014.25.2
Aug29° / 23°20213.5013.45.0
Sep25° / 19°1549.8012.26.7
Oct20° / 12°625011.17.2
Nov14° / 395010.14.8
Dec / -0°243.70.59.61.5

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 59% of the time in December, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 12% of December, with mostly cloudy or overcast conditions the remaining 29%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16832
26832
36832
46931
57030
67030
77030
87030
97129
107129
117129
127129
137129
147129
157129
167228
177228
187129
197129
207129
217228
227228
237228
247228
257327
267327
277327
287327
297327
307426
317327

Chance of precipitation in December

Any precipitationSnow

Heunghae gets around 24 mm of rain and snow over 3.7 wet days in December, the driest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 12% and peaks near 17% on the wettest days, and about 1 day brings snow. The odds ease toward the end of the month.

0%10%20%30%151015202531
Rain chance (%)Snow chance (%)
1171
2162
3162
4162
5162
6152
7152
8142
9142
10132
11132
12122
13121
14111
15111
16111
17101
18101
19101
20101
21101
2291
2391
2491
2591
2691
2792
2892
2992
3092
31102

Humidity in December

DryComfortableHumidMuggyOppressiveMiserable

Most of December feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, December lands in the dry band about 100% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)
1100
2100
3100
4100
5100
6100
7100
8100
9100
10100
11100
12100
13100
14100
15100
16100
17100
18100
19100
20100
21100
22100
23100
24100
25100
26100
27100
28100
29100
30100
31100

Wind in December

Winds average 14 km/h in December.

Across December, daily wind ranges from about 12 km/h on the calmest days to 14 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
112light breeze
213light breeze
313light breeze
413light breeze
513light breeze
613light breeze
713light breeze
813light breeze
913light breeze
1013light breeze
1113light breeze
1213light breeze
1314light breeze
1414light breeze
1514light breeze
1614light breeze
1714light breeze
1814light breeze
1914light breeze
2014light breeze
2114light breeze
2214light breeze
2314light breeze
2414light breeze
2514light breeze
2614light breeze
2714light breeze
2814light breeze
2914light breeze
3014light breeze
3114light breeze

Sunrise & sunset in December

DaylightNight

Daylight runs from about 9 h 42 min at the start of December to 9 h 36 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 6 minutes over December. Sunrise moves from 7:21 AM to 7:39 AM, and sunset from 5:04 PM to 5:13 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
19.77:215:04
29.77:225:04
39.77:225:04
49.77:235:04
59.77:245:04
69.67:255:04
79.67:265:04
89.67:265:04
99.67:275:04
109.67:285:04
119.67:295:04
129.67:295:04
139.67:305:05
149.67:315:05
159.67:315:05
169.67:325:05
179.67:335:06
189.57:335:06
199.57:345:07
209.57:345:07
219.57:355:07
229.57:355:08
239.57:365:08
249.57:365:09
259.57:375:09
269.57:375:10
279.67:375:11
289.67:385:11
299.67:385:12
309.67:385:12
319.67:395:13

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 2.6 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 2.6 kWh/m² to a high of 5.84 kWh/m² in May across the year — December's 2.6 kWh/m² sits near the bottom.

0123151015202531
Solar energy (kWh/m²)Level
12.6Moderate
22.6Moderate
32.6Moderate
42.6Moderate
52.6Moderate
62.6Moderate
72.6Moderate
82.6Moderate
92.6Moderate
102.6Moderate
112.6Moderate
122.6Moderate
132.6Moderate
142.6Moderate
152.6Moderate
162.6Moderate
172.6Moderate
182.6Moderate
192.6Moderate
202.6Moderate
212.6Moderate
222.6Moderate
232.6Moderate
242.6Moderate
252.7Moderate
262.7Moderate
272.7Moderate
282.7Moderate
292.7Moderate
302.7Moderate
312.8Moderate
Planning a trip in December

Hazard calendar for Heunghae

In seasonPeak

In December, Heunghae sits inside its pacific typhoon season. The full year is below, with each hazard's peak months called out.

Heunghae sits in the Pacific typhoon belt; the season peaks July–October.

Heunghae's rainy season runs June–September, when most of the year's rain falls.

Pacific typhoon
Rainy season
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is December a good time to visit Heunghae?

Our two travel scores rate December for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

1.5
Sightseeing
10th-best month of the year
0.0
Beach & pool
10th-best month of the year

December is a weaker month for outdoor sightseeing in Heunghae.

What to pack for Heunghae in December

From December's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In December, Heunghae sees daytime highs around 8°C and nights near -0°C. Pack a warm layer. Worth having: a heavy coat. About 4 days see rain.

a warm layera heavy coat

Sea temperature near Heunghae in December

The nearest coast averages about 16°C in December — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 25 km away) is warmest in August at about 25°C and coldest in February near 12°C.

It's comfortable for a long swim from Jun 25 to Oct 28 — about 4.1 months when the water holds above 20°C.

10°15°20°25°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmcomfortable to swim
Sea temperature (°C)Comfort
Jan14Bracing
Feb12Bracing
Mar13Bracing
Apr14Bracing
May16Cool
Jun19Cool
Jul22Refreshing
Aug25Warm
Sep24Refreshing
Oct21Refreshing
Nov18Cool
Dec16Cool

UV index in Heunghae in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 2. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Heunghae peaks around August 16 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 23 at about 2 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 10 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highVery highModerateAug 16UV 9Dec 23UV 2
UV index (midday)Level
Jan2Moderate
Feb3Moderate
Mar5Moderate
Apr7High
May8Very high
Jun6High
Jul8Very high
Aug10Very high
Sep8Very high
Oct5High
Nov3Moderate
Dec2Moderate

Air quality in Heunghae in December

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where December falls, not just the annual average.

Air quality in Heunghae is worst in March — around 66 µg/m³ PM2.5 (unhealthy), about 1.9× the cleanest month (August, 34 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

020406080JanFebMarAprMayJunJulAugSepOctNovDecPoorUnhealthyPoorPoorMar 1865 µg/m³Aug 1535 µg/m³
PM2.5 (µg/m³)Level
Jan51Poor
Feb57Unhealthy
Mar66Unhealthy
Apr60Unhealthy
May55Poor
Jun47Poor
Jul37Poor
Aug34Moderate
Sep39Poor
Oct47Poor
Nov56Unhealthy
Dec47Poor
Location & terrain

Where is Heunghae?

Heunghae sits at 36.1°N, 129.3°E, 22 m above sea level, in South Korea. The nearest listed city is Pohang, 9.0 km away.

EisenCheongsong gunHayangGyeongsan-siUlsan

Topography around Heunghae

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Heunghae.

Within 3 km, the terrain around Heunghae has only modest variations in elevation — a maximum elevation change of 105 m around an average of 26 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 864 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,200 m.

The land around Heunghae is covered by cropland (53%) and trees (23%) within 3 km, trees (42%) and water (31%) within 16 km, and trees (57%) and water (30%) within 80 km.

3 km
105 m
16 km
864 m
80 km
1,200 m
treesgrasslandcroplandartificial surfacesbare terrainwater
December weather nearby: Pohang 9.0 km · Yeonil 12 km · Gyeongju 32 km · Eisen 40 km · Cheongsong gun 44 km · Hayang 52 km · Gyeongsan-si 63 km · Ulsan 64 km

South Korea travel facts

Travel advisory
Level 1
Exercise Normal Precautions
Power plugs
Type C / F
220 V · 60 Hz
Prices
≈ 57% of US
price level, 2025
GDP per capita
$36,227
2025
Happiness
6.0 / 10
World Happiness, 2025
Safe drinking water
99%
of population, 2024
Homicide rate
0.5
per 100k, 2023
Road deaths
8.6
per 100k/yr, 2019
Income group
High
World Bank
English
Moderate
EF EPI 522
Religion
none 60%Protestant 17%Buddhist 16%Catholic 6%

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Heunghae (36.1095°, 129.3452°, elevation 22 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).