Myoko weather in December

In December, Myoko sees average daytime highs of 6°C and overnight lows near -1°C, with 227 mm of precipitation across 23 wet days and about 9.5 hours of daylight. It is the 10th-warmest and 3rd-wettest month of the year here.

Highs ease over the month, from about 8°C in the first days to 4°C by the end. The sky is clear or mostly clear about 13% of the time in December, and the air most often feels dry.

Daylight stretches from about 9 h 36 min at the start of December to 9 h 30 min by month's end. Set against the rest of the year, December is Myoko's 7th-clearest and 3rd-windiest month. For the whole year in context, see Myoko's year-round climate.

Daytime high
10th warmest
Overnight low
-1°
3rd coldest
Precipitation
227 mm
23 wet days
Daylight
9 h 30 min
6:59 AM – 4:27 PM
Cloud cover
69%
7th clearest
Wind
8 km/h
3rd windiest
Solar energy
2.02 kWh/m²
Travel score
0.3
out of 10

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 8°C in the first days to 4°C by the end.

A typical December day in Myoko reaches about 6°C in the afternoon and slips back to -1°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 1°C and 10°C. Set against its neighbours, December runs about 6°C cooler than November and about 3°C warmer than January.

-10°-5°10°15°151015202531
Avg high (°C)Avg low (°C)
191
281
381
481
581
670
770
870
970
1060
1160
126-1
136-1
146-1
156-1
165-1
175-1
185-1
195-2
205-2
215-2
225-2
234-2
244-2
254-2
264-2
274-2
284-2
294-2
304-2
313-2

How December really feels in Myoko

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.

Myoko weather by month

How December compares with the rest of the year at a glance. December is the 10th-warmest and 3rd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -3°24225.423.59.70.0
Feb / -3°17920.918.410.60.0
Mar / -1°1622013.311.70.6
Apr13° / 11714.82.712.93.4
May19° / 10°130140145.6
Jun23° / 16°16616.5014.55.4
Jul26° / 20°24921.1014.34.8
Aug28° / 21°19119.7013.44.8
Sep24° / 17°20417.2012.35.4
Oct18° / 11°18816.40114.9
Nov12° / 16618.23.4102.5
Dec / -1°2272315.69.50.3

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 13% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 18% of December, with mostly cloudy or overcast conditions the remaining 69%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13367
23367
33268
43268
53268
63268
73268
83169
93169
103169
113169
123169
133169
143169
153169
163268
173268
183268
193268
203268
213268
223268
233169
243169
253169
263169
272971
282971
292971
302872
312674

Chance of precipitation in December

Any precipitationSnow

Myoko gets around 227 mm of rain and snow over 23 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 74% and peaks near 79% on the wettest days, and about 16 days bring snow. The odds climb toward the end of the month.

0%20%40%60%80%151015202531
Rain chance (%)Snow chance (%)
16828
26930
37031
47133
57235
67237
77339
87341
97343
107445
117446
127448
137449
147450
157451
167452
177452
187453
197454
207455
217456
227457
237558
247559
257660
267661
277663
287764
297765
307866
317968

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 8 km/h in December.

Across December, daily wind ranges from about 8 km/h on the calmest days to 8 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
18calm
28calm
38calm
48calm
58calm
68calm
78calm
88calm
98calm
108calm
118calm
128calm
138calm
148calm
158calm
168calm
178calm
188calm
198calm
208calm
218calm
228calm
238calm
248calm
258calm
268calm
278calm
288calm
298calm
308calm
318calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 9 h 36 min at the start of December to 9 h 30 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 6:47 AM to 7:05 AM, and sunset from 4:26 PM to 4:35 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
19.66:474:26
29.66:484:26
39.66:494:26
49.66:504:26
59.66:514:26
69.66:524:26
79.66:534:26
89.56:534:26
99.56:544:26
109.56:554:26
119.56:564:26
129.56:564:26
139.56:574:26
149.56:584:27
159.56:584:27
169.56:594:27
179.57:004:28
189.57:004:28
199.57:014:28
209.57:014:29
219.57:024:29
229.57:024:30
239.57:034:30
249.57:034:31
259.57:044:31
269.57:044:32
279.57:044:32
289.57:054:33
299.57:054:34
309.57:054:34
319.57:054:35

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 2.02 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 2.02 kWh/m² to a high of 5.68 kWh/m² in May across the year — December's 2.02 kWh/m² sits near the bottom.

0123151015202531
Solar energy (kWh/m²)Level
12.1Moderate
22.0Moderate
32.0Moderate
42.0Moderate
52.0Moderate
62.0Moderate
72.0Moderate
82.0Moderate
92.0Moderate
102.0Moderate
112.0Moderate
122.0Moderate
132.0Moderate
142.0Moderate
152.0Moderate
162.0Moderate
172.0Moderate
182.0Moderate
192.0Moderate
202.0Moderate
212.0Moderate
222.1Moderate
232.1Moderate
242.1Moderate
252.1Moderate
262.1Moderate
272.1Moderate
282.1Moderate
292.1Moderate
302.1Moderate
312.1Moderate
Planning a trip in December

Hazard calendar for Myoko

In seasonPeak

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

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

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

Is December a good time to visit Myoko?

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

0.3
Sightseeing
10th-best month of the year
0.0
Beach & pool
9th-best month of the year

December is a weaker month for outdoor sightseeing in Myoko.

What to pack for Myoko in December

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

In December, Myoko sees daytime highs around 6°C and nights near -1°C. Pack a warm layer and rain gear. Worth having: a heavy coat. About 23 days see rain.

a warm layerrain geara heavy coat

Sea temperature near Myoko in December

The nearest coast averages about 15°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 16 km away) is warmest in August at about 27°C and coldest in March near 10°C.

It's comfortable for a long swim from Jun 20 to Nov 1 — about 4.4 months when the water holds above 20°C.

10°20°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan13Bracing
Feb11Bracing
Mar10Bracing
Apr11Bracing
May15Bracing
Jun20Cool
Jul23Refreshing
Aug27Warm
Sep25Warm
Oct22Refreshing
Nov19Cool
Dec15Cool

UV index in Myoko 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 Myoko peaks around August 12 at about 10 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near January 1 at about 2 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 9 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highModerateAug 12UV 10Jan 1UV 2
UV index (midday)Level
Jan2Moderate
Feb4Moderate
Mar4Moderate
Apr7High
May8Very high
Jun9Very high
Jul9Very high
Aug10Very high
Sep9Very high
Oct5High
Nov3Moderate
Dec2Moderate

Air quality in Myoko 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 Myoko is worst in April — around 21 µg/m³ PM2.5 (moderate), about 2.2× the cleanest month (December, 10 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodApr 1721 µg/m³Dec 1510 µg/m³
PM2.5 (µg/m³)Level
Jan11Good
Feb14Moderate
Mar20Moderate
Apr21Moderate
May20Moderate
Jun18Moderate
Jul15Moderate
Aug13Moderate
Sep12Good
Oct11Good
Nov11Good
Dec10Good
Location & terrain

Where is Myoko?

Myoko sits at 37.0°N, 138.3°E, 79 m above sea level, in Japan. The nearest listed city is Arai, 4.0 km away.

Topography around Myoko

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

Within 3 km, the terrain around Myoko has significant variations in elevation — a maximum elevation change of 317 m around an average of 100 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,556 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,978 m.

The land around Myoko is covered by trees (39%), cropland (34%) and artificial surfaces (20%) within 3 km, trees (74%) within 16 km, and trees (60%) and water (29%) within 80 km.

3 km
317 m
16 km
1,556 m
80 km
2,978 m
treesgrasslandcroplandartificial surfacesbare terrainwater
December weather nearby: Arai 4.0 km · Jōetsu 14 km · Iiyama 22 km · Nakano 32 km · Itoigawa 36 km · Suzaka 42 km · Nagano 42 km · Kashiwazaki 46 km

Japan travel facts

Travel advisory
Level 1
Exercise Normal Precautions
Power plugs
Type A / B
100 V · 50 / 60 Hz
Prices
≈ 65% of US
price level, 2025
GDP per capita
$35,951
2025
Happiness
6.1 / 10
World Happiness, 2025
Safe drinking water
99%
of population, 2024
Homicide rate
0.2
per 100k, 2023
Road deaths
3.6
per 100k/yr, 2019
Income group
High
World Bank
English
Very low
EF EPI 446
Religion
Shintoism 49%Buddhism 46%other 4%Christianity 1%

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 Myoko (37.0253°, 138.2556°, elevation 79 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).