Mochibaru weather in December

In December, Mochibaru sees average daytime highs of 14°C and overnight lows near 6°C, with 81 mm of rain across 6.4 wet days and about 10 hours of daylight. It is the 10th-warmest and 11th-wettest month of the year here.

Highs ease over the month, from about 16°C in the first days to 13°C by the end. The sky is clear or mostly clear about 54% 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 Mochibaru's 1st-clearest and 8th-windiest month. For the whole year in context, see Mochibaru's year-round climate.

Daytime high
14°
10th warmest
Overnight low
3rd coldest
Rainfall
81 mm
6.4 wet days
Daylight
9 h 54 min
7:14 AM – 5:10 PM
Cloud cover
42%
1st clearest
Wind
10 km/h
8th windiest
Solar energy
2.76 kWh/m²
Travel score
4.6
out of 10

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 16°C in the first days to 13°C by the end.

A typical December day in Mochibaru reaches about 14°C in the afternoon and slips back to 6°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 9°C and 18°C. Set against its neighbours, December runs about 5°C cooler than November and about 2°C warmer than January.

10°15°20°151015202531
Avg high (°C)Avg low (°C)
1168
2168
3168
4158
5157
6157
7157
8157
9157
10146
11146
12146
13146
14146
15146
16146
17145
18135
19135
20135
21135
22135
23135
24135
25135
26135
27134
28134
29134
30134
31124

How December really feels in Mochibaru

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.

Mochibaru weather by month

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

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan12° / 817.210.23.4
Feb13° / 978.310.83.8
Mar16° / 15612.411.84.9
Apr20° / 12°17511.912.85.9
May23° / 16°20312.613.66.3
Jun26° / 20°41319.8144.8
Jul30° / 24°25118.213.94.1
Aug30° / 24°22617.913.24.0
Sep28° / 22°27616.912.25.1
Oct24° / 17°16610.811.26.8
Nov19° / 11°1098.410.46.3
Dec14° / 816.4104.6

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 54% of the time in December, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 14% of December, with mostly cloudy or overcast conditions the remaining 32%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16535
26535
36535
46535
56535
66634
76634
86733
96634
106733
116733
126634
136733
146733
156733
166733
176733
186733
196733
206832
216832
226832
236931
246931
257030
267030
277030
287129
297129
307129
317129

Chance of precipitation in December

Any precipitation

Mochibaru gets around 81 mm of rain over 6.4 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 21% and peaks near 26% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%40%151015202531
Rain chance (%)
126
226
325
425
524
624
723
823
922
1022
1121
1221
1321
1420
1520
1620
1720
1820
1920
2019
2119
2219
2319
2419
2518
2618
2718
2818
2918
3018
3118

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 95% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)
18974
29073
39073
49163
59262
69262
79352
89352
99451
109451
119451
129541
139541
149541
159640
169640
179640
189640
199640
209640
219640
229640
239730
249730
259730
269730
279820
289820
299820
309820
319910

Wind in December

Winds average 10 km/h in December.

Across December, daily wind ranges from about 10 km/h on the calmest days to 11 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
110calm
210calm
310calm
410calm
510calm
610calm
710calm
810calm
910calm
1010calm
1110calm
1210calm
1310calm
1410calm
1510calm
1610calm
1710calm
1810calm
1910calm
2010calm
2110calm
2210calm
2310calm
2410calm
2510calm
2611calm
2711calm
2811calm
2911calm
3011calm
3111calm

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 5:17 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
110.17:035:08
210.17:045:07
310.07:055:07
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
1110.07:105:08
1210.07:115:09
1310.07:125:09
149.97:125:09
159.97:135:09
169.97:145:10
179.97:145:10
189.97:155:10
199.97:155:11
209.97:165:11
219.97:165:12
229.97:175:12
239.97:175:13
249.97:185:13
259.97:185:14
269.97:185:14
279.97:195:15
289.97:195:15
299.97:195:16
309.97:205:17
3110.07:205:17

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 2.76 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 2.76 kWh/m² to a high of 5.14 kWh/m² in July across the year — December's 2.76 kWh/m² sits near the bottom.

0123151015202531
Solar energy (kWh/m²)Level
12.7Moderate
22.7Moderate
32.7Moderate
42.7Moderate
52.7Moderate
62.7Moderate
72.7Moderate
82.7Moderate
92.7Moderate
102.7Moderate
112.7Moderate
122.7Moderate
132.7Moderate
142.7Moderate
152.7Moderate
162.7Moderate
172.8Moderate
182.8Moderate
192.8Moderate
202.8Moderate
212.8Moderate
222.8Moderate
232.8Moderate
242.8Moderate
252.9Moderate
262.9Moderate
272.9Moderate
282.9Moderate
292.9Moderate
302.9Moderate
313.0Moderate
Planning a trip in December

Hazard calendar for Mochibaru

In seasonPeak

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

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

Mochibaru's rainy season runs May–September, 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 Mochibaru?

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

4.6
Sightseeing
8th-best month of the year
0.1
Beach & pool
10th-best month of the year

December is a reasonable time to visit Mochibaru for sightseeing.

What to pack for Mochibaru in December

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

In December, Mochibaru sees daytime highs around 14°C and nights near 6°C. Worth packing: a warm layer. About 6 days see rain.

a warm layer

Sea temperature near Mochibaru 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 42 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 Mochibaru 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 Mochibaru 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 Mochibaru 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 Mochibaru 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 Mochibaru?

Mochibaru sits at 31.8°N, 131.1°E, 151 m above sea level, in Japan. The nearest listed city is Miyakonojō, 6.0 km away.

Topography around Mochibaru

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

Within 3 km, the terrain around Mochibaru has only modest variations in elevation — a maximum elevation change of 188 m around an average of 170 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 987 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,679 m.

The land around Mochibaru is covered by cropland (42%), artificial surfaces (28%) and trees (27%) within 3 km, trees (70%) within 16 km, and trees (57%) and water (34%) within 80 km.

3 km
188 m
16 km
987 m
80 km
1,679 m
treesgrasslandcroplandartificial surfaceswater
December weather nearby: Miyakonojō 6.0 km · Sueyoshichō-ninokata 16 km · Soo 18 km · Nichinan 28 km · Kobayashi 29 km · Shibushi 31 km · Kushima 32 km · Honjō 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 Mochibaru (31.7551°, 131.1298°, elevation 151 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).