Kaseda-shirakame weather in December

In December, Kaseda-shirakame sees average daytime highs of 14°C and overnight lows near 10°C, with 102 mm of rain across 10.5 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 16°C in the first days to 13°C by the end. The sky is clear or mostly clear about 27% 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 Kaseda-shirakame's 4th-clearest and 3rd-windiest month. For the whole year in context, see Kaseda-shirakame's year-round climate.

Daytime high
14°
10th warmest
Overnight low
10°
3rd coldest
Rainfall
102 mm
10.5 wet days
Daylight
10 hours
7:16 AM – 5:14 PM
Cloud cover
60%
4th clearest
Wind
17 km/h
3rd windiest
Solar energy
2.34 kWh/m²
Travel score
4.2
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 Kaseda-shirakame reaches about 14°C in the afternoon and slips back to 10°C overnight — a 4°C spread between the day's warmth and the night's chill. On most days the high lands between 10°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°25°151015202531
Avg high (°C)Avg low (°C)
11712
21612
31612
41612
51611
61611
71511
81511
91511
101511
111510
121510
131510
141410
151410
161410
171410
181410
191410
201410
211410
22149
23149
24149
25139
26139
27139
28139
29139
30139
31139

How December really feels in Kaseda-shirakame

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.

Kaseda-shirakame 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
Jan12° / 10412.510.23.0
Feb13° / 11711.510.93.4
Mar16° / 11°17013.611.84.5
Apr19° / 14°18912.112.75.8
May23° / 18°20711.713.66.4
Jun26° / 22°49919.3145.0
Jul29° / 25°30717.513.84.5
Aug30° / 26°16415.313.14.3
Sep28° / 24°20613.412.25.5
Oct24° / 19°113911.27.2
Nov19° / 15°1279.510.46.2
Dec14° / 10°10210.5104.2

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 27% 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 54%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15347
25149
35149
45149
55050
64951
74852
84753
94654
104555
114654
124555
134555
144654
154456
164456
174555
184555
194456
204456
214456
224456
234456
244456
254555
264555
274456
284456
294258
304258
314258

Chance of precipitation in December

Any precipitation

Kaseda-shirakame gets around 102 mm of rain over 10.5 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 rain averages around 34% and peaks near 36% on the wettest days.

0%10%20%30%40%50%151015202531
Rain chance (%)
134
235
335
435
535
635
735
835
935
1035
1135
1236
1336
1436
1535
1635
1735
1834
1934
2034
2133
2233
2333
2433
2532
2632
2732
2832
2932
3033
3133

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 92% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
1821161
2851050
386950
487940
588840
688840
790730
890730
990730
1091630
1192620
1292620
1392620
1492620
1592620
1692620
1793610
1893610
1993610
2093610
2193610
2293610
2393610
2495500
2595500
2695500
2795500
2896400
2996400
3096400
3197300

Wind in December

Winds average 17 km/h in December.

Across December, daily wind ranges from about 16 km/h on the calmest days to 18 km/h at its breeziest. It stays fairly steady from day to day.

0510152025151015202531
Wind speed (km/h)Feels
116light breeze
216light breeze
316light breeze
416light breeze
516light breeze
617light breeze
717light breeze
817light breeze
917light breeze
1017light breeze
1117light breeze
1217light breeze
1317light breeze
1417light breeze
1517light breeze
1617light breeze
1717light breeze
1817light breeze
1917light breeze
2018light breeze
2118light breeze
2218light breeze
2318light breeze
2418light breeze
2518light breeze
2618light breeze
2718light breeze
2818light breeze
2918light breeze
3018light breeze
3118light breeze

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 7:05 AM to 7:22 AM, and sunset from 5:12 PM to 5:21 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
110.17:055:12
210.17:065:12
310.17:075:12
410.17:085:12
510.17:095:12
610.07:095:12
710.07:105:12
810.07:115:12
910.07:115:12
1010.07:125:12
1110.07:135:12
1210.07:135:13
1310.07:145:13
1410.07:155:13
1510.07:155:14
1610.07:165:14
1710.07:175:14
1810.07:175:15
1910.07:185:15
2010.07:185:15
2110.07:195:16
2210.07:195:16
2310.07:205:17
2410.07:205:17
2510.07:205:18
2610.07:215:18
2710.07:215:19
2810.07:225:19
2910.07:225:20
3010.07:225:21
3110.07:225:21

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 2.34 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 2.34 kWh/m² to a high of 5.14 kWh/m² in May across the year — December's 2.34 kWh/m² sits near the bottom.

0123151015202531
Solar energy (kWh/m²)Level
12.5Moderate
22.5Moderate
32.4Moderate
42.4Moderate
52.4Moderate
62.4Moderate
72.4Moderate
82.4Moderate
92.4Moderate
102.3Moderate
112.3Moderate
122.3Moderate
132.3Moderate
142.3Moderate
152.3Moderate
162.3Moderate
172.3Moderate
182.3Moderate
192.3Moderate
202.3Moderate
212.4Moderate
222.4Moderate
232.4Moderate
242.4Moderate
252.4Moderate
262.4Moderate
272.4Moderate
282.4Moderate
292.4Moderate
302.4Moderate
312.4Moderate
Planning a trip in December

Hazard calendar for Kaseda-shirakame

In seasonPeak

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

Kaseda-shirakame sits in the Pacific typhoon belt; the season peaks July–October.

Kaseda-shirakame's rainy season runs June–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 Kaseda-shirakame?

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

4.2
Sightseeing
10th-best month of the year
0.2
Beach & pool
10th-best month of the year

December is a reasonable time to visit Kaseda-shirakame for sightseeing.

What to pack for Kaseda-shirakame in December

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

In December, Kaseda-shirakame sees daytime highs around 14°C and nights near 10°C. Worth packing: a warm layer and rain gear. About 11 days see rain.

a warm layerrain gear

Sea temperature near Kaseda-shirakame 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 19 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 26 to Dec 26 — about 8.1 months when the water holds above 20°C.

15°20°25°30°JanFebMarAprMayJunJulAugSepOctNovDeccoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan19Cool
Feb18Cool
Mar19Cool
Apr19Cool
May21Refreshing
Jun24Refreshing
Jul27Warm
Aug28Tropical
Sep27Warm
Oct25Warm
Nov23Refreshing
Dec21Refreshing

UV index in Kaseda-shirakame 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 Kaseda-shirakame peaks around July 10 at about 11 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 23 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 highHighModerateJul 10UV 11Dec 23UV 3
UV index (midday)Level
Jan3Moderate
Feb5Moderate
Mar7High
Apr8Very high
May8Very high
Jun11Extreme
Jul11Extreme
Aug9Very high
Sep10Very high
Oct6High
Nov5Moderate
Dec3Moderate

Air quality in Kaseda-shirakame 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 Kaseda-shirakame is worst in April — around 23 µg/m³ PM2.5 (moderate), about 1.9× the cleanest month (October, 12 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateApr 1423 µg/m³Oct 1012 µg/m³
PM2.5 (µg/m³)Level
Jan15Moderate
Feb19Moderate
Mar22Moderate
Apr23Moderate
May21Moderate
Jun17Moderate
Jul12Moderate
Aug14Moderate
Sep12Moderate
Oct12Moderate
Nov14Moderate
Dec13Moderate
Location & terrain

Where is Kaseda-shirakame?

Kaseda-shirakame sits at 31.4°N, 130.3°E, 22 m above sea level, in Japan. The nearest listed city is Minamisatsuma, 4.0 km away.

Topography around Kaseda-shirakame

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

Within 3 km, the terrain around Kaseda-shirakame has only modest variations in elevation — a maximum elevation change of 194 m around an average of 35 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 611 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,644 m.

The land around Kaseda-shirakame is covered by trees (59%) and artificial surfaces (21%) within 3 km, trees (62%) and water (26%) within 16 km, and water (66%) and trees (29%) within 80 km.

3 km
194 m
16 km
611 m
80 km
1,644 m
treesgrasslandcroplandartificial surfaceswater
December weather nearby: Minamisatsuma 4.0 km · Minamikyushu 15 km · Makurazaki 17 km · Ijūin 24 km · Kagoshima 28 km · Umeki 29 km · Kushikino 34 km · Ichikikushikino 35 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 Kaseda-shirakame (31.4167°, 130.3167°, elevation 22 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).