Miyako weather in December

In December, Miyako sees average daytime highs of 6°C and overnight lows near 2°C, with 76 mm of precipitation across 9.4 wet days and about 9.2 hours of daylight. It is the 9th-warmest and 10th-wettest month of the year here.

Highs ease over the month, from about 8°C in the first days to 5°C by the end. The sky is clear or mostly clear about 43% of the time in December, and the air most often feels dry.

Daylight stretches from about 9 h 24 min at the start of December to 9 h 12 min by month's end. Set against the rest of the year, December is Miyako's 2nd-clearest and 2nd-windiest month. For the whole year in context, see Miyako's year-round climate.

Daytime high
9th warmest
Overnight low
4th coldest
Precipitation
76 mm
9.4 wet days
Daylight
9 h 12 min
6:52 AM – 4:05 PM
Cloud cover
50%
2nd clearest
Wind
20 km/h
2nd windiest
Solar energy
1.98 kWh/m²
Travel score
0.6
out of 10

Miyako is city in Iwate prefecture, Japan.

Density
41/km²
people per km²
Founded
1941

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 8°C in the first days to 5°C by the end.

A typical December day in Miyako reaches about 6°C in the afternoon and slips back to 2°C overnight — a 4°C spread between the day's warmth and the night's chill. On most days the high lands between 2°C and 10°C. Set against its neighbours, December runs about 5°C cooler than November and about 3°C warmer than January.

-5°10°15°151015202531
Avg high (°C)Avg low (°C)
194
284
384
484
584
683
773
873
973
1073
1173
1273
1362
1462
1562
1662
1762
1862
1962
2062
2161
2251
2351
2451
2551
2651
2751
2851
2951
3051
3140

How December really feels in Miyako

Once humidity and wind are folded in, December averages 0 days that feel above 32°C and 29 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
29
wind chill below the day's low

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

Miyako weather by month

How December compares with the rest of the year at a glance. December is the 9th-warmest and 10th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -1°729.15.19.50.0
Feb / -1°658.9610.40.0
Mar / 10011.55.411.70.2
Apr / 9910.31.1131.8
May13° / 10°10911014.23.5
Jun16° / 14°12111.5014.74.7
Jul20° / 18°15314.4014.55.5
Aug22° / 20°16613.6013.66.0
Sep20° / 18°19313.4012.35.6
Oct16° / 13°16211.4010.95.1
Nov12° / 799.60.59.83.1
Dec / 769.42.99.20.6

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 43% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 19% of December, with mostly cloudy or overcast conditions the remaining 37%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16238
26139
36139
46139
56139
66139
76238
86238
96238
106238
116238
126337
136337
146238
156238
166238
176238
186337
196337
206337
216436
226436
236436
246436
256436
266436
276436
286535
296535
306535
316535

Chance of precipitation in December

Any precipitationSnow

Miyako gets around 76 mm of rain and snow over 9.4 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 31% and peaks near 32% on the wettest days, and about 3 days bring snow.

0%10%20%30%40%151015202531
Rain chance (%)Snow chance (%)
1324
2325
3325
4315
5316
6316
7316
8317
9317
10318
11328
12329
13329
143210
153210
163210
173211
183211
193211
203211
213112
223111
233011
243011
252911
262811
272811
282711
292711
302611
312611

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 20 km/h in December.

Across December, daily wind ranges from about 19 km/h on the calmest days to 22 km/h at its breeziest. It stays fairly steady from day to day.

0510152025151015202531
Wind speed (km/h)Feels
119light breeze
219light breeze
319light breeze
419light breeze
519light breeze
620light breeze
720light breeze
820light breeze
920light breeze
1020light breeze
1120light breeze
1220light breeze
1320light breeze
1420breezy
1520breezy
1620breezy
1720breezy
1820breezy
1920breezy
2021breezy
2121breezy
2221breezy
2321breezy
2421breezy
2521breezy
2621breezy
2721breezy
2821breezy
2921breezy
3021breezy
3122breezy

Sunrise & sunset in December

DaylightNight

Daylight runs from about 9 h 24 min at the start of December to 9 h 12 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 6:40 AM to 6:58 AM, and sunset from 4:04 PM to 4:12 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
19.46:404:04
29.46:414:04
39.46:424:04
49.36:434:04
59.36:444:03
69.36:454:03
79.36:454:03
89.36:464:03
99.36:474:03
109.36:484:04
119.36:494:04
129.26:494:04
139.26:504:04
149.26:514:04
159.26:514:04
169.26:524:05
179.26:534:05
189.26:534:05
199.26:544:06
209.26:544:06
219.26:554:07
229.26:554:07
239.26:564:07
249.26:564:08
259.26:574:09
269.26:574:09
279.26:574:10
289.26:584:10
299.26:584:11
309.26:584:12
319.26:584:12

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 1.98 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 1.98 kWh/m² to a high of 5.42 kWh/m² in May across the year — December's 1.98 kWh/m² sits near the bottom.

0123151015202531
Solar energy (kWh/m²)Level
12.0Moderate
22.0Moderate
32.0Moderate
42.0Moderate
52.0Moderate
62.0Dim
72.0Dim
82.0Dim
92.0Dim
102.0Dim
112.0Dim
122.0Dim
132.0Dim
142.0Dim
152.0Dim
162.0Dim
172.0Dim
182.0Dim
192.0Moderate
202.0Moderate
212.0Moderate
222.0Moderate
232.0Moderate
242.0Moderate
252.1Moderate
262.1Moderate
272.1Moderate
282.1Moderate
292.1Moderate
302.1Moderate
312.1Moderate
Planning a trip in December

Hazard calendar for Miyako

In seasonPeak

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

Miyako 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 Miyako?

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

0.6
Sightseeing
9th-best month of the year
0.0
Beach & pool
8th-best month of the year

December is a weaker month for outdoor sightseeing in Miyako.

What to pack for Miyako in December

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

In December, Miyako sees daytime highs around 6°C and nights near 2°C. Pack a warm layer. Worth having: a heavy coat, rain gear and a windbreaker. About 9 days see rain.

a warm layera heavy coatrain geara windbreaker

Sea temperature near Miyako in December

The nearest coast averages about 13°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 21°C and coldest in March near 6°C.

It's comfortable for a long swim from Aug 4 to Sep 26 — about 1.8 months when the water holds above 20°C.

5°10°15°20°25°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmcomfortable to swim
Sea temperature (°C)Comfort
Jan10Bracing
Feb7Bracing
Mar6Bracing
Apr8Bracing
May11Bracing
Jun15Bracing
Jul18Cool
Aug21Refreshing
Sep21Refreshing
Oct18Cool
Nov15Cool
Dec13Bracing

UV index in Miyako 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 Miyako peaks around August 19 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near January 1 at about 2 (low).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highHighVery highHighModerateLowAug 19UV 9Jan 1UV 2
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar4Moderate
Apr6High
May8Very high
Jun7Very high
Jul6High
Aug9Very high
Sep7Very high
Oct5Moderate
Nov2Moderate
Dec2Low

Air quality in Miyako 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 Miyako is worst in April — around 20 µg/m³ PM2.5 (moderate), about 2.2× the cleanest month (December, 9 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodApr 1320 µg/m³Dec 169 µg/m³
PM2.5 (µg/m³)Level
Jan10Good
Feb14Moderate
Mar19Moderate
Apr20Moderate
May18Moderate
Jun13Moderate
Jul12Good
Aug10Good
Sep10Good
Oct11Good
Nov10Good
Dec9Good
Location & terrain

Where is Miyako?

Miyako sits at 39.6°N, 141.9°E, 10 m above sea level, in Japan. The nearest listed city is Yamada, 20 km away.

Topography around Miyako

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

Within 3 km, the terrain around Miyako has significant variations in elevation — a maximum elevation change of 320 m around an average of 80 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,209 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,869 m.

The land around Miyako is covered by trees (66%) and artificial surfaces (22%) within 3 km, trees (67%) and water (29%) within 16 km, and trees (60%) and water (34%) within 80 km.

3 km
320 m
16 km
1,209 m
80 km
1,869 m
treesgrasslandcroplandartificial surfacesbare terrainwater
December weather nearby: Yamada 20 km · Kamaishi 42 km · Tōno 51 km · Kuji 62 km · Ōfunato 67 km · Hizume 67 km · Morioka 68 km · Yahaba 68 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 Miyako (39.6469°, 141.9406°, elevation 10 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).