Miyakonojō weather in December

In December, Miyakonojō sees average daytime highs of 13°C and overnight lows near 4°C, with 81 mm of precipitation across 6.6 wet days and about 10 hours of daylight. It is the 10th-warmest and 12th-wettest month of the year here.

Highs ease over the month, from about 15°C in the first days to 12°C by the end. The sky is clear or mostly clear about 46% of the time in December, and the air most often feels dry.

Daylight stretches from about 10 h 06 min at the start of December to 10 hours by month's end. Set against the rest of the year, December is Miyakonojō's 1st-clearest and 5th-windiest month. For the whole year in context, see Miyakonojō's year-round climate.

Daytime high
13°
10th warmest
Overnight low
3rd coldest
Precipitation
81 mm
6.6 wet days
Daylight
9 h 54 min
7:14 AM – 5:10 PM
Cloud cover
47%
1st clearest
Wind
8 km/h
5th windiest
Solar energy
2.68 kWh/m²
Travel score
4.1
out of 10

Miyakonojō is city in Miyazaki Prefecture, Japan.

Density
247/km²
people per km²
Founded
2006

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 15°C in the first days to 12°C by the end.

A typical December day in Miyakonojō reaches about 13°C in the afternoon and slips back to 4°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 8°C and 17°C. Set against its neighbours, December runs about 5°C cooler than November and about 2°C warmer than January.

-5°10°15°20°151015202531
Avg high (°C)Avg low (°C)
1156
2156
3155
4155
5155
6145
7145
8144
9144
10144
11134
12134
13134
14134
15133
16133
17133
18133
19133
20123
21123
22123
23123
24123
25122
26122
27122
28122
29122
30122
31122

How December really feels in Miyakonojō

Once humidity and wind are folded in, December averages 0 days that feel above 32°C and 7 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
7
wind chill below the day's low

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

Miyakonojō 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 daysDaylight (hours)Travel score
Jan11° / 817.710.22.9
Feb12° / 1008.510.83.4
Mar16° / 15912.811.84.6
Apr20° / 10°1821212.85.9
May24° / 15°20712.313.66.3
Jun26° / 19°46020.7144.7
Jul30° / 23°28020.213.93.8
Aug30° / 24°19919.813.23.7
Sep28° / 21°23316.412.25.1
Oct24° / 15°13710.311.26.9
Nov18° / 1088.610.46.1
Dec13° / 816.6104.1

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 46% of the time in December, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 17% of December, with mostly cloudy or overcast conditions the remaining 37%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16337
26238
36238
46337
56238
66238
76337
86238
96238
106238
116337
126337
136238
146238
156238
166337
176337
186337
196337
206337
216238
226337
236337
246436
256436
266337
276436
286436
296337
306337
316238

Chance of precipitation in December

Any precipitation

Miyakonojō gets around 81 mm of rain and snow over 6.6 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 21% and peaks near 27% on the wettest days, and about 0 day brings snow. The odds ease toward the end of the month.

0%10%20%30%40%151015202531
Rain chance (%)
127
227
326
426
526
625
724
824
923
1023
1122
1222
1322
1422
1521
1621
1721
1820
1920
2020
2119
2219
2319
2419
2518
2618
2718
2818
2918
3019
3119

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 96% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)
19172
29262
39262
49361
59361
69451
79451
89541
99640
109640
119640
129730
139730
149730
159730
169730
179730
189730
199730
209730
219820
229820
239820
249820
259820
269820
279820
289910
299910
309910
319910

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 9 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
279calm
289calm
299calm
309calm
319calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 10 h 06 min at the start of December to 10 hours by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 6 minutes over December. Sunrise moves from 7:03 AM to 7:20 AM, and sunset from 5:08 PM to 5:18 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
110.17:035:08
210.17:045:08
310.17:055:08
410.07:055:08
510.07:065:08
610.07:075:08
710.07:085:08
810.07:085:08
910.07:095:08
1010.07:105:08
1110.07:115:09
1210.07:115:09
1310.07:125:09
149.97:135:09
159.97:135:10
169.97:145:10
179.97:145:10
189.97:155:11
199.97:155:11
209.97:165:12
219.97:165:12
229.97:175:12
239.97:175:13
249.97:185:13
259.97:185:14
269.97:195:15
279.97:195:15
289.97:195:16
299.97:205:16
309.97:205:17
3110.07:205:18

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 2.68 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 2.68 kWh/m² to a high of 5.06 kWh/m² in May across the year — December's 2.68 kWh/m² sits near the bottom.

0123151015202531
Solar energy (kWh/m²)Level
12.7Moderate
22.7Moderate
32.7Moderate
42.7Moderate
52.7Moderate
62.6Moderate
72.6Moderate
82.6Moderate
92.6Moderate
102.6Moderate
112.6Moderate
122.7Moderate
132.7Moderate
142.7Moderate
152.7Moderate
162.7Moderate
172.7Moderate
182.7Moderate
192.7Moderate
202.7Moderate
212.7Moderate
222.7Moderate
232.7Moderate
242.8Moderate
252.8Moderate
262.8Moderate
272.8Moderate
282.8Moderate
292.8Moderate
302.9Moderate
312.9Moderate
Planning a trip in December

Hazard calendar for Miyakonojō

In seasonPeak

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

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

Miyakonojō's rainy season runs May–July, 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 Miyakonojō?

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

4.1
Sightseeing
8th-best month of the year
0.0
Beach & pool
10th-best month of the year

December is a reasonable time to visit Miyakonojō for sightseeing.

What to pack for Miyakonojō in December

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

In December, Miyakonojō sees daytime highs around 13°C and nights near 4°C. Worth packing: a warm layer. About 7 days see rain.

a warm layer

Sea temperature near Miyakonojō in December

The nearest coast averages about 21°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 40 km away) is warmest in August at about 28°C and coldest in February near 18°C.

It's comfortable for a long swim from Apr 14 to Jan 4 — about 8.7 months when the water holds above 20°C.

20°25°30°JanFebMarAprMayJunJulAugSepOctNovDeccoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan19Cool
Feb18Cool
Mar19Cool
Apr20Refreshing
May22Refreshing
Jun24Refreshing
Jul27Warm
Aug28Tropical
Sep27Warm
Oct26Warm
Nov23Refreshing
Dec21Refreshing

UV index in Miyakonojō in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 3 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Miyakonojō peaks around June 22 at about 11 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near January 1 at about 3 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highExtremeVery highHighModerateJun 22UV 11Jan 1UV 3
UV index (midday)Level
Jan3Moderate
Feb5Moderate
Mar7High
Apr8Very high
May8Very high
Jun11Extreme
Jul11Extreme
Aug10Very high
Sep10Very high
Oct6High
Nov5Moderate
Dec3Moderate

Air quality in Miyakonojō 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 Miyakonojō is worst in April — around 22 µg/m³ PM2.5 (moderate), about 1.9× the cleanest month (July, 11 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodGoodModerateApr 1421 µg/m³Sep 1911 µg/m³
PM2.5 (µg/m³)Level
Jan15Moderate
Feb18Moderate
Mar21Moderate
Apr22Moderate
May20Moderate
Jun16Moderate
Jul11Good
Aug12Moderate
Sep11Good
Oct12Good
Nov13Moderate
Dec12Moderate
Location & terrain

Where is Miyakonojō?

Miyakonojō sits at 31.7°N, 131.1°E, 148 m above sea level, in Japan. The nearest listed city is Mochibaru, 6.0 km away.

Topography around Miyakonojō

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

Within 3 km, the terrain around Miyakonojō has only modest variations in elevation — a maximum elevation change of 41 m around an average of 151 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 828 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,679 m.

The land around Miyakonojō is covered by artificial surfaces (66%) and cropland (22%) within 3 km, trees (67%) and cropland (20%) within 16 km, and trees (57%) and water (34%) within 80 km.

3 km
41 m
16 km
828 m
80 km
1,679 m
treesgrasslandcroplandartificial surfaceswater
December weather nearby: Mochibaru 6.0 km · Sueyoshichō-ninokata 10 km · Soo 12 km · Kokubu-matsuki 28 km · Kirishima 29 km · Shibushi 29 km · Kobayashi 29 km · Hamanoichi 32 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 Miyakonojō (31.7333°, 131.0667°, elevation 148 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).