Ŭllyul weather in December

In December, Ŭllyul sees average daytime highs of 3°C and overnight lows near -4°C, with 22 mm of precipitation across 5.3 wet days and about 9.4 hours of daylight. It is the 11th-warmest and 10th-wettest month of the year here.

Highs ease over the month, from about 5°C in the first days to 1°C by the end. The sky is clear or mostly clear about 31% of the time in December, and the air most often feels dry.

Daylight stretches from about 9 h 30 min at the start of December to 9 h 18 min by month's end. Set against the rest of the year, December is Ŭllyul's 9th-clearest and 3rd-windiest month. For the whole year in context, see Ŭllyul's year-round climate.

Daytime high
11th warmest
Overnight low
-4°
3rd coldest
Precipitation
22 mm
5.3 wet days
Daylight
9 h 18 min
7:56 AM – 5:15 PM
Cloud cover
58%
9th clearest
Wind
12 km/h
3rd windiest
Solar energy
2.1 kWh/m²
Travel score
0.0
out of 10

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 5°C in the first days to 1°C by the end.

A typical December day in Ŭllyul reaches about 3°C in the afternoon and slips back to -4°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between -3°C and 8°C. Set against its neighbours, December runs about 7°C cooler than November and about 3°C warmer than January.

-10°10°151015202531
Avg high (°C)Avg low (°C)
16-2
25-2
35-2
45-2
55-2
64-3
74-3
84-3
94-3
104-3
113-4
123-4
133-4
143-4
153-4
163-4
173-4
183-4
192-5
202-5
212-5
222-5
232-5
242-5
252-5
262-5
272-5
281-5
291-5
301-6
311-6

How December really feels in Ŭllyul

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
7 feel bitter (≤ -10°C)

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

Ŭllyul weather by month

How December compares with the rest of the year at a glance. December is the 11th-warmest and 10th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -7°133.32.89.60.0
Feb / -5°173.6210.50.0
Mar / -0°244.2111.72.1
Apr16° / 466.20.1135.6
May22° / 12°837.3014.17.2
Jun26° / 17°918.6014.66.8
Jul28° / 22°22714.6014.45.2
Aug29° / 22°19513.6013.55.2
Sep25° / 16°866.6012.37.3
Oct19° / 405.80116.8
Nov10° / 437.10.99.92.7
Dec / -4°225.32.49.40.0

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 31% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 17% of December, with mostly cloudy or overcast conditions the remaining 52%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14753
24654
34555
44555
54456
64456
74456
84357
94357
104357
114357
124456
134555
144654
154654
164753
174852
184951
195050
205050
215149
225149
235248
245248
255248
265248
275248
285248
295149
305149
315050

Chance of precipitation in December

Any precipitationSnow

Ŭllyul gets around 22 mm of rain and snow over 5.3 wet days in December. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 17% and peaks near 24% on the wettest days, and about 2 days bring snow. The odds ease toward the end of the month.

0%10%20%30%151015202531
Rain chance (%)Snow chance (%)
1246
2246
3247
4237
5237
6238
7228
8228
9218
10218
11209
12209
13199
14189
15178
16168
17168
18158
19148
20148
21138
22138
23138
24138
25138
26139
27139
28139
291310
301310
311310

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 12 km/h in December.

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

051015151015202531
Wind speed (km/h)Feels
112calm
212calm
312calm
412calm
512calm
612calm
712light breeze
812light breeze
912light breeze
1012light breeze
1112light breeze
1212light breeze
1312light breeze
1412light breeze
1512light breeze
1612light breeze
1712light breeze
1812light breeze
1912light breeze
2012light breeze
2112light breeze
2212light breeze
2312light breeze
2412light breeze
2512light breeze
2612light breeze
2712light breeze
2812light breeze
2912light breeze
3012light breeze
3112light breeze

Sunrise & sunset in December

DaylightNight

Daylight runs from about 9 h 30 min at the start of December to 9 h 18 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 12 minutes over December. Sunrise moves from 7:44 AM to 8:02 AM, and sunset from 5:14 PM to 5:23 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
19.57:445:14
29.57:455:14
39.57:465:14
49.57:465:14
59.47:475:14
69.47:485:14
79.47:495:14
89.47:505:14
99.47:515:14
109.47:515:14
119.47:525:14
129.47:535:14
139.37:545:14
149.37:545:15
159.37:555:15
169.37:565:15
179.37:565:15
189.37:575:16
199.37:575:16
209.37:585:17
219.37:585:17
229.37:595:17
239.37:595:18
249.38:005:18
259.38:005:19
269.38:015:20
279.38:015:20
289.38:015:21
299.38:025:21
309.38:025:22
319.38:025:23

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 2.1 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 2.1 kWh/m² to a high of 6 kWh/m² in May across the year — December's 2.1 kWh/m² sits near the bottom.

0123151015202531
Solar energy (kWh/m²)Level
12.1Moderate
22.1Moderate
32.1Moderate
42.1Moderate
52.1Moderate
62.1Moderate
72.1Moderate
82.1Moderate
92.1Moderate
102.1Moderate
112.1Moderate
122.1Moderate
132.1Moderate
142.1Moderate
152.1Moderate
162.1Moderate
172.1Moderate
182.1Moderate
192.1Moderate
202.1Moderate
212.1Moderate
222.1Moderate
232.1Moderate
242.1Moderate
252.2Moderate
262.2Moderate
272.2Moderate
282.2Moderate
292.2Moderate
302.2Moderate
312.2Moderate
Planning a trip in December

Hazard calendar for Ŭllyul

In seasonPeak

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

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

Ŭllyul's rainy season runs July–August, 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 Ŭllyul?

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

0.0
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 Ŭllyul.

What to pack for Ŭllyul in December

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

In December, Ŭllyul sees daytime highs around 3°C and nights near -4°C. Pack a warm layer and a heavy coat. About 5 days see rain.

a warm layera heavy coat

Sea temperature near Ŭllyul in December

The nearest coast averages about 10°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 30 km away) is warmest in August at about 22°C and coldest in February near 3°C.

It's comfortable for a long swim from Jul 16 to Oct 3 — about 2.6 months when the water holds above 20°C.

0°10°20°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmcomfortable to swim
Sea temperature (°C)Comfort
Jan6Bracing
Feb3Bracing
Mar4Bracing
Apr7Bracing
May11Bracing
Jun16Cool
Jul20Refreshing
Aug22Refreshing
Sep22Refreshing
Oct19Cool
Nov15Bracing
Dec10Bracing

UV index in Ŭllyul 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 Ŭllyul peaks around August 13 at about 8 (very high) — sunscreen and a hat are worth it in the middle of the day. It bottoms out near December 20 at about 2 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highHighModerateLowAug 13UV 8Dec 20UV 2
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar4Moderate
Apr6High
May7High
Jun6High
Jul8Very high
Aug8Very high
Sep7High
Oct4Moderate
Nov3Moderate
Dec2Low

Air quality in Ŭllyul 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 Ŭllyul is worst in November — around 82 µg/m³ PM2.5 (unhealthy), about 2.1× the cleanest month (July, 40 µg/m³).

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

0306090JanFebMarAprMayJunJulAugSepOctNovDecUnhealthyPoorUnhealthyNov 1981 µg/m³Jul 2240 µg/m³
PM2.5 (µg/m³)Level
Jan80Unhealthy
Feb78Unhealthy
Mar80Unhealthy
Apr66Unhealthy
May54Poor
Jun46Poor
Jul40Poor
Aug41Poor
Sep58Unhealthy
Oct72Unhealthy
Nov82Unhealthy
Dec77Unhealthy
Location & terrain

Where is Ŭllyul?

Ŭllyul sits at 38.5°N, 125.2°E, 29 m above sea level, in North Korea. The nearest listed city is Kwail-ŭp, 17 km away.

Topography around Ŭllyul

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

Within 3 km, the terrain around Ŭllyul has significant variations in elevation — a maximum elevation change of 264 m around an average of 49 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 1,063 m; within 80 km, large variations in elevation — a maximum elevation change of 1,037 m.

The land around Ŭllyul is covered by cropland (70%) within 3 km, trees (45%) and cropland (42%) within 16 km, and water (38%), cropland (36%) and trees (21%) within 80 km.

3 km
264 m
16 km
1,063 m
80 km
1,037 m
treesgrasslandcroplandartificial surfacesbare terrainwater
December weather nearby: Kwail-ŭp 17 km · Songhwa 18 km · Samch’ŏn 21 km · Ŭnch’ŏn-ŭp 21 km · Chaeryŏng-ni 25 km · Anak 26 km · Changyŏn 30 km · Namp’o 31 km

North Korea travel facts

Travel advisory
Level 4
Do Not Travel
Power plugs
Type C / F
220 V · 50 Hz
Safe drinking water
67%
of population, 2023
Road deaths
24.2
per 100k/yr, 2019
Income group
Low
World Bank

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 Ŭllyul (38.5139°, 125.1897°, elevation 29 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).