Miyakojima weather in December

In December, Miyakojima sees average daytime highs of 22°C and overnight lows near 20°C, with 133 mm of rain across 12.5 wet days and about 10.5 hours of daylight. It is the 9th-warmest and 8th-wettest month of the year here.

Highs ease over the month, from about 23°C in the first days to 21°C by the end. The sky is clear or mostly clear about 20% of the time in December, and the air most often feels comfortable.

Daylight stretches from about 10 h 36 min at the start of December to 10 h 30 min by month's end. Set against the rest of the year, December is Miyakojima's 9th-clearest and 1st-windiest month. For the whole year in context, see Miyakojima's year-round climate.

Daytime high
22°
9th warmest
Overnight low
20°
4th coldest
Rainfall
133 mm
12.5 wet days
Daylight
10 h 30 min
7:21 AM – 5:49 PM
Cloud cover
69%
9th clearest
Wind
31 km/h
1st windiest
Solar energy
2.48 kWh/m²
Travel score
6.1
out of 10

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 23°C in the first days to 21°C by the end.

A typical December day in Miyakojima reaches about 22°C in the afternoon and slips back to 20°C overnight — a 2°C spread between the day's warmth and the night's chill. On most days the high lands between 19°C and 24°C. Set against its neighbours, December runs about 3°C cooler than November and about 2°C warmer than January.

15°20°25°30°151015202531
Avg high (°C)Avg low (°C)
12322
22321
32321
42321
52321
62321
72321
82321
92221
102221
112221
122221
132220
142220
152220
162220
172220
182220
192220
202220
212220
222120
232120
242120
252120
262119
272119
282119
292119
302119
312119

How December really feels in Miyakojima

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

December sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Miyakojima weather by month

How December compares with the rest of the year at a glance. December is the 9th-warmest and 8th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan20° / 18°12914.610.65.5
Feb21° / 19°10412.311.15.7
Mar22° / 20°11712.811.86.1
Apr24° / 22°14012.612.66.4
May26° / 24°18214.313.25.9
Jun28° / 27°16914.313.55.3
Jul29° / 28°13512.813.45.2
Aug29° / 28°21316.412.94.8
Sep28° / 27°18915.112.25.4
Oct26° / 25°13412.111.46.4
Nov24° / 23°12412.910.86.4
Dec22° / 20°13312.510.56.1

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 20% 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 62%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14357
24258
34159
44159
54060
64060
73961
83961
93862
103763
113763
123763
133862
143862
153862
163862
173862
183862
193862
203862
213763
223763
233763
243664
253664
263664
273565
283565
293466
303466
313367

Chance of precipitation in December

Any precipitation

Miyakojima gets around 133 mm of rain over 12.5 wet days in December. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 40% and peaks near 42% on the wettest days.

0%10%20%30%40%50%151015202531
Rain chance (%)
141
240
340
439
539
639
739
839
940
1040
1140
1241
1341
1441
1541
1641
1741
1841
1941
2041
2141
2241
2340
2440
2540
2640
2740
2840
2941
3041
3142

Humidity in December

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, December lands in the comfortable band about 27% of days. Sticky, muggy-or-worse air turns up on roughly 21% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1132128299
2142228279
3152328268
4162428248
5162528237
6172629227
7172729216
8182729206
9192829195
10192829195
11202929194
12212929184
13222928183
14222928183
15232928182
16242828182
17252827172
18262827172
19272827162
20292826162
21302826151
22312825141
23332825141
24342725131
25352724121
26362724111
27372724111
28372725101
29372725101
3038272591
3138272591

Wind in December

Winds average 31 km/h in December, the windiest month of the year.

Across December, daily wind ranges from about 29 km/h on the calmest days to 31 km/h at its breeziest. It stays fairly steady from day to day.

0102030151015202531
Wind speed (km/h)Feels
131windy
231windy
331windy
431windy
531windy
631windy
731windy
831windy
931windy
1031windy
1131windy
1231windy
1331windy
1431windy
1531windy
1631windy
1731windy
1831windy
1930windy
2030windy
2130windy
2230windy
2330windy
2430windy
2530windy
2630windy
2730windy
2829windy
2929windy
3029windy
3129windy

Sunrise & sunset in December

DaylightNight

Daylight runs from about 10 h 36 min at the start of December to 10 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 7:11 AM to 7:27 AM, and sunset from 5:46 PM to 5:56 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
110.67:115:46
210.67:125:46
310.67:135:46
410.57:135:46
510.57:145:46
610.57:155:46
710.57:155:46
810.57:165:47
910.57:175:47
1010.57:175:47
1110.57:185:47
1210.57:195:48
1310.57:195:48
1410.57:205:48
1510.57:205:49
1610.57:215:49
1710.57:215:49
1810.57:225:50
1910.57:225:50
2010.57:235:51
2110.57:235:51
2210.57:245:52
2310.57:245:52
2410.57:255:52
2510.57:255:53
2610.57:265:54
2710.57:265:54
2810.57:265:55
2910.57:275:55
3010.57:275:56
3110.57:275:56

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 2.48 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 2.48 kWh/m² to a high of 6.38 kWh/m² in July across the year — December's 2.48 kWh/m² sits near the bottom.

0123151015202531
Solar energy (kWh/m²)Level
12.7Moderate
22.7Moderate
32.7Moderate
42.6Moderate
52.6Moderate
62.6Moderate
72.6Moderate
82.6Moderate
92.5Moderate
102.5Moderate
112.5Moderate
122.5Moderate
132.5Moderate
142.5Moderate
152.5Moderate
162.5Moderate
172.5Moderate
182.5Moderate
192.5Moderate
202.5Moderate
212.5Moderate
222.5Moderate
232.5Moderate
242.5Moderate
252.5Moderate
262.5Moderate
272.5Moderate
282.5Moderate
292.5Moderate
302.5Moderate
312.5Moderate
Planning a trip in December

Hazard calendar for Miyakojima

In seasonPeak

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

Miyakojima 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 Miyakojima?

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

6.1
Sightseeing
4th-best month of the year
4.2
Beach & pool
9th-best month of the year

December is a reasonable time to visit Miyakojima for sightseeing.

What to pack for Miyakojima in December

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

In December, Miyakojima sees daytime highs around 22°C and nights near 20°C. Pack a windbreaker. Worth having: rain gear. About 13 days see rain.

a windbreakerrain gear

Sea temperature near Miyakojima in December

The nearest coast averages about 24°C in December — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea offshore is warmest in August at about 29°C and coldest in February near 23°C.

The water stays above 20°C all year — warm enough for a swim any month.

22°24°26°28°30°JanFebMarAprMayJunJulAugSepOctNovDecrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan23Refreshing
Feb23Refreshing
Mar23Refreshing
Apr24Warm
May26Warm
Jun28Warm
Jul29Tropical
Aug29Tropical
Sep28Tropical
Oct27Warm
Nov26Warm
Dec24Warm

UV index in Miyakojima in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 5 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Miyakojima peaks around June 20 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 21 at about 5 (high).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecHighVery highExtremeVery highHighJun 20UV 12Dec 21UV 5
UV index (midday)Level
Jan6High
Feb8Very high
Mar10Very high
Apr9Very high
May10Very high
Jun12Extreme
Jul12Extreme
Aug12Extreme
Sep11Extreme
Oct8Very high
Nov7High
Dec5High

Air quality in Miyakojima 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 Miyakojima is worst in March — around 16 µg/m³ PM2.5 (moderate), about 2.4× the cleanest month (June, 7 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodMar 1816 µg/m³Jun 217 µg/m³
PM2.5 (µg/m³)Level
Jan12Good
Feb13Moderate
Mar16Moderate
Apr14Moderate
May10Good
Jun7Good
Jul8Good
Aug8Good
Sep8Good
Oct10Good
Nov10Good
Dec11Good
Location & terrain

Where is Miyakojima?

Miyakojima sits at 24.8°N, 125.3°E, 36 m above sea level, in Japan. The nearest listed city is Hirara, 2.0 km away.

ItomanTomigusukuNahaYaeseKanegusukuNanjō

Topography around Miyakojima

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

Within 3 km, the terrain around Miyakojima has only modest variations in elevation — a maximum elevation change of 103 m around an average of 39 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 114 m; within 80 km, only modest variations in elevation — a maximum elevation change of 110 m.

The land around Miyakojima is covered by trees (33%) and cropland (32%) within 3 km, water (77%) within 16 km, and water (98%) within 80 km.

3 km
103 m
16 km
114 m
80 km
110 m
treesgrasslandcroplandartificial surfacesbare terrainwater
December weather nearby: Hirara 2.0 km · Ishigaki 127 km · Itoman 280 km · Tomigusuku 284 km · Naha 285 km · Yaese 286 km · Kanegusuku 288 km · Nanjō 289 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 Miyakojima (24.7902°, 125.3111°, elevation 36 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).