Kami weather in December

In December, Kami sees average daytime highs of 12°C and overnight lows near 3°C, with 63 mm of precipitation across 8.4 wet days and about 9.8 hours of daylight. It is the 10th-warmest and 11th-wettest month of the year here.

Highs ease over the month, from about 14°C in the first days to 11°C by the end. The sky is clear or mostly clear about 24% of the time in December, and the air most often feels dry.

Daylight stretches from about 9 h 54 min at the start of December to 9 h 48 min by month's end. Set against the rest of the year, December is Kami's 3rd-clearest and 5th-windiest month. For the whole year in context, see Kami's year-round climate.

Daytime high
12°
10th warmest
Overnight low
3rd coldest
Precipitation
63 mm
8.4 wet days
Daylight
9 h 48 min
7:19 AM – 5:07 PM
Cloud cover
60%
3rd clearest
Wind
8 km/h
5th windiest
Solar energy
2.19 kWh/m²
Travel score
3.2
out of 10

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 14°C in the first days to 11°C by the end.

A typical December day in Kami reaches about 12°C in the afternoon and slips back to 3°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 7°C and 16°C. Set against its neighbours, December runs about 6°C cooler than November and about 2°C warmer than January.

-5°10°15°20°151015202531
Avg high (°C)Avg low (°C)
1145
2145
3145
4145
5135
6135
7134
8134
9134
10124
11124
12124
13124
14123
15123
16123
17123
18113
19113
20113
21113
22113
23113
24113
25113
26112
27112
28112
29112
30102
31102

How December really feels in Kami

Once humidity and wind are folded in, December averages 0 days that feel above 32°C and 6 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
6
wind chill below the day's low

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

Kami 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 daysSnow daysDaylight (hours)Travel score
Jan10° / 598.61.6102.1
Feb11° / 6991.210.82.6
Mar15° / 11311.60.211.74.2
Apr20° / 10°12711.1012.86.0
May24° / 15°14410.5013.76.6
Jun27° / 19°30315.7014.25.3
Jul30° / 23°26416.90143.9
Aug32° / 24°15114.4013.23.7
Sep28° / 20°16612.7012.25.5
Oct23° / 14°988011.27.2
Nov17° / 808.1010.35.8
Dec12° / 638.40.69.83.2

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 24% 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 56%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15050
24951
34852
44852
54753
64654
74654
84654
94555
104555
114456
124456
134357
144258
154258
164159
174159
184159
194159
204159
214258
224258
234258
244258
254258
264258
274258
284258
294258
304159
314159

Chance of precipitation in December

Any precipitationSnow

Kami gets around 63 mm of rain and snow over 8.4 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 26% and peaks near 29% on the wettest days, and about 1 day brings snow.

0%10%20%30%40%151015202531
Rain chance (%)Snow chance (%)
1281
2291
3291
4291
5281
6281
7281
8281
9271
10271
11272
12272
13262
14262
15262
16262
17262
18262
19262
20262
21262
22263
23263
24263
25263
26253
27253
28254
29244
30244
31244

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 99% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)
1964
2973
3973
4973
5982
6982
7982
8982
9991
10991
11991
12991
13991
14991
151000
161000
171000
181000
191000
201000
211000
221000
231000
241000
251000
261000
271000
281000
291000
301000
311000

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
278calm
288calm
299calm
309calm
319calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 9 h 54 min at the start of December to 9 h 48 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 7:09 AM to 7:26 AM, and sunset from 5:05 PM to 5:14 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
19.97:095:05
29.97:095:05
39.97:105:05
49.97:115:05
59.97:125:05
69.97:135:05
79.97:135:05
89.87:145:05
99.87:155:05
109.87:165:05
119.87:165:05
129.87:175:06
139.87:185:06
149.87:185:06
159.87:195:06
169.87:195:07
179.87:205:07
189.87:215:07
199.87:215:08
209.87:225:08
219.87:225:09
229.87:235:09
239.87:235:10
249.87:245:10
259.87:245:11
269.87:245:11
279.87:255:12
289.87:255:12
299.87:255:13
309.87:265:14
319.87:265:14

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 2.19 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 2.19 kWh/m² to a high of 5.34 kWh/m² in May across the year — December's 2.19 kWh/m² sits near the bottom.

0123151015202531
Solar energy (kWh/m²)Level
12.3Moderate
22.3Moderate
32.3Moderate
42.3Moderate
52.3Moderate
62.2Moderate
72.2Moderate
82.2Moderate
92.2Moderate
102.2Moderate
112.2Moderate
122.2Moderate
132.2Moderate
142.2Moderate
152.2Moderate
162.2Moderate
172.2Moderate
182.2Moderate
192.2Moderate
202.2Moderate
212.2Moderate
222.2Moderate
232.2Moderate
242.2Moderate
252.2Moderate
262.2Moderate
272.2Moderate
282.3Moderate
292.3Moderate
302.3Moderate
312.3Moderate
Planning a trip in December

Hazard calendar for Kami

In seasonPeak

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

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

Kami'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 Kami?

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

3.2
Sightseeing
10th-best month of the year
0.0
Beach & pool
10th-best month of the year

December is a weaker month for outdoor sightseeing in Kami.

What to pack for Kami in December

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

In December, Kami sees daytime highs around 12°C and nights near 3°C. Pack a warm layer. Worth having: rain gear. About 8 days see rain.

a warm layerrain gear

Sea temperature near Kami in December

The nearest coast averages about 16°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 35 km away) is warmest in August at about 27°C and coldest in February near 12°C.

It's comfortable for a long swim from Jun 6 to Nov 9 — about 5.2 months when the water holds above 20°C.

10°20°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan13Bracing
Feb12Bracing
Mar12Bracing
Apr14Bracing
May18Cool
Jun21Refreshing
Jul25Warm
Aug27Warm
Sep26Warm
Oct23Refreshing
Nov19Cool
Dec16Cool

UV index in Kami in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 3. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Kami peaks around July 17 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 21 at about 3 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 10 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highModerateJul 17UV 9Dec 21UV 3
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar6High
Apr8Very high
May8Very high
Jun9Very high
Jul10Very high
Aug9Very high
Sep9Very high
Oct6High
Nov4Moderate
Dec3Moderate

Air quality in Kami 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 Kami is worst in April — around 25 µg/m³ PM2.5 (moderate), about 2.1× the cleanest month (October, 12 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateApr 1225 µg/m³Oct 1212 µg/m³
PM2.5 (µg/m³)Level
Jan17Moderate
Feb20Moderate
Mar25Moderate
Apr25Moderate
May23Moderate
Jun18Moderate
Jul13Moderate
Aug15Moderate
Sep13Moderate
Oct12Moderate
Nov15Moderate
Dec14Moderate
Location & terrain

Where is Kami?

Kami sits at 33.5°N, 130.8°E, 79 m above sea level, in Japan. The nearest listed city is Kawasaki, 9.0 km away.

Topography around Kami

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

Within 3 km, the terrain around Kami has significant variations in elevation — a maximum elevation change of 487 m around an average of 149 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 1,168 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,796 m.

The land around Kami is covered by trees (76%) within 3 km, trees (74%) within 16 km, and trees (46%) and water (35%) within 80 km.

3 km
487 m
16 km
1,168 m
80 km
1,796 m
treesgrasslandcroplandartificial surfacesbare terrainwater
December weather nearby: Kawasaki 9.0 km · Tagawa 12 km · Asakura 13 km · Iizuka 14 km · Amagi 16 km · Akaike 18 km · Yamaguma 18 km · Ukiha 19 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 Kami (33.5294°, 130.7648°, elevation 79 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).