Tsuiki weather in December

In December, Tsuiki sees average daytime highs of 12°C and overnight lows near 6°C, with 68 mm of precipitation across 10.1 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 13°C in the first days to 10°C by the end. The sky is clear or mostly clear about 22% 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 Tsuiki's 5th-clearest and 2nd-windiest month. For the whole year in context, see Tsuiki's year-round climate.

Daytime high
12°
10th warmest
Overnight low
3rd coldest
Precipitation
68 mm
10.1 wet days
Daylight
9 h 48 min
7:19 AM – 5:05 PM
Cloud cover
61%
5th clearest
Wind
13 km/h
2nd windiest
Solar energy
2.16 kWh/m²
Travel score
3.0
out of 10

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 13°C in the first days to 10°C by the end.

A typical December day in Tsuiki reaches about 12°C in the afternoon and slips back to 6°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between 7°C and 15°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)
1148
2148
3138
4138
5138
6137
7137
8127
9127
10127
11127
12127
13126
14126
15116
16116
17116
18116
19116
20116
21116
22116
23115
24115
25115
26105
27105
28105
29105
30105
31105

How December really feels in Tsuiki

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.

Tsuiki 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
Jan / 689.91.5101.8
Feb10° / 759.61.210.72.2
Mar13° / 12411.40.211.73.7
Apr18° / 11°13811012.85.6
May22° / 16°15510.5013.76.6
Jun25° / 20°27814.6014.25.8
Jul29° / 24°23815.10144.7
Aug30° / 25°13212.3013.34.5
Sep27° / 22°15711.9012.26.1
Oct22° / 17°1007.8011.27.1
Nov17° / 11°828.5010.35.6
Dec12° / 6810.10.39.83.0

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 22% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 22% 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 (%)
15149
25050
34951
44951
54852
64852
74852
84753
94753
104555
114555
124456
134456
144258
154258
164357
174159
184159
194159
204159
214060
224159
234159
244159
254159
264159
274159
284159
294159
304258
314258

Chance of precipitation in December

Any precipitationSnow

Tsuiki gets around 68 mm of rain and snow over 10.1 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 32% and peaks near 33% on the wettest days, and about 0 day brings snow.

0%10%20%30%40%151015202531
Rain chance (%)Snow chance (%)
1310
2310
3320
4320
5320
6320
7320
8320
9320
10320
11321
12321
13321
14331
15331
16331
17331
18331
19331
20331
21332
22332
23332
24332
25322
26322
27312
28302
29303
30293
31283

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
2964
3973
4973
5973
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 13 km/h in December.

Across December, daily wind ranges from about 12 km/h on the calmest days to 13 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
112calm
212calm
312calm
412light breeze
512light breeze
612light breeze
712light breeze
812light breeze
912light breeze
1012light breeze
1113light breeze
1213light breeze
1313light breeze
1413light breeze
1513light breeze
1613light breeze
1713light breeze
1813light breeze
1913light breeze
2013light breeze
2113light breeze
2213light breeze
2313light breeze
2413light breeze
2513light breeze
2613light breeze
2713light breeze
2813light breeze
2913light breeze
3013light breeze
3113light breeze

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 7:08 AM to 7:25 AM, and sunset from 5:03 PM to 5:13 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
19.97:085:03
29.97:095:03
39.97:095:03
49.97:105:03
59.97:115:03
69.97:125:03
79.87:135:03
89.87:135:03
99.87:145:04
109.87:155:04
119.87:165:04
129.87:165:04
139.87:175:04
149.87:185:05
159.87:185:05
169.87:195:05
179.87:195:06
189.87:205:06
199.87:205:06
209.87:215:07
219.87:215:07
229.87:225:08
239.87:225:08
249.87:235:09
259.87:235:09
269.87:245:10
279.87:245:10
289.87:245:11
299.87:255:11
309.87:255:12
319.87:255:13

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 2.16 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 2.16 kWh/m² to a high of 5.42 kWh/m² in May across the year — December's 2.16 kWh/m² sits near the bottom.

0123151015202531
Solar energy (kWh/m²)Level
12.3Moderate
22.3Moderate
32.3Moderate
42.2Moderate
52.2Moderate
62.2Moderate
72.2Moderate
82.2Moderate
92.2Moderate
102.2Moderate
112.1Moderate
122.1Moderate
132.1Moderate
142.1Moderate
152.1Moderate
162.1Moderate
172.1Moderate
182.1Moderate
192.1Moderate
202.1Moderate
212.1Moderate
222.1Moderate
232.2Moderate
242.2Moderate
252.2Moderate
262.2Moderate
272.2Moderate
282.2Moderate
292.2Moderate
302.2Moderate
312.2Moderate
Planning a trip in December

Hazard calendar for Tsuiki

In seasonPeak

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

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

Tsuiki's rainy season runs April–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 Tsuiki?

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

3.0
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 Tsuiki.

What to pack for Tsuiki in December

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

In December, Tsuiki sees daytime highs around 12°C and nights near 6°C. Pack a warm layer. Worth having: rain gear. About 10 days see rain.

a warm layerrain gear

Sea temperature near Tsuiki 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 offshore 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 Tsuiki 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 Tsuiki peaks around June 21 at about 10 (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 highModerateJun 21UV 10Dec 21UV 3
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar6High
Apr8Very high
May8Very high
Jun10Very high
Jul10Very high
Aug9Very high
Sep9Very high
Oct6High
Nov4Moderate
Dec3Moderate

Air quality in Tsuiki 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 Tsuiki is worst in March — around 27 µg/m³ PM2.5 (moderate), about 2.2× the cleanest month (October, 12 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateMar 2026 µg/m³Oct 1212 µg/m³
PM2.5 (µg/m³)Level
Jan17Moderate
Feb20Moderate
Mar27Moderate
Apr24Moderate
May21Moderate
Jun18Moderate
Jul16Moderate
Aug19Moderate
Sep13Moderate
Oct12Good
Nov14Moderate
Dec13Moderate
Location & terrain

Where is Tsuiki?

Tsuiki sits at 33.7°N, 131.0°E, 15 m above sea level, in Japan. The nearest listed city is Yukuhashi, 8.0 km away.

Topography around Tsuiki

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

Within 3 km, the terrain around Tsuiki has only modest variations in elevation — a maximum elevation change of 95 m around an average of 16 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 822 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,799 m.

The land around Tsuiki is covered by cropland (28%), artificial surfaces (27%) and water (21%) within 3 km, trees (38%) and water (38%) within 16 km, and trees (48%) and water (36%) within 80 km.

3 km
95 m
16 km
822 m
80 km
1,799 m
treesgrasslandcroplandartificial surfacesbare terrainwater
December weather nearby: Yukuhashi 8.0 km · Buzen 11 km · Miyako 11 km · Kanda 13 km · Nakatsu 16 km · Kawasaki 22 km · Tagawa 22 km · Akaike 25 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 Tsuiki (33.6731°, 131.0378°, elevation 15 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).