Tsuma weather in December

In December, Tsuma sees average daytime highs of 14°C and overnight lows near 10°C, with 80 mm of rain across 6.3 wet days and about 9.9 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 57% 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 9 h 54 min by month's end. Set against the rest of the year, December is Tsuma's 1st-clearest and 7th-windiest month. For the whole year in context, see Tsuma's year-round climate.

Daytime high
14°
10th warmest
Overnight low
10°
3rd coldest
Rainfall
80 mm
6.3 wet days
Daylight
9 h 54 min
7:13 AM – 5:08 PM
Cloud cover
40%
1st clearest
Wind
13 km/h
7th windiest
Solar energy
2.72 kWh/m²
Travel score
4.8
out of 10

Tsuma is human settlement in Japan.

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 16°C in the first days to 13°C by the end.

A typical December day in Tsuma 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°151015202531
Avg high (°C)Avg low (°C)
11612
21612
31612
41611
51611
61511
71511
81511
91511
101510
111510
121410
131410
141410
151410
161410
171410
18149
19149
20149
21149
22139
23139
24139
25139
26139
27139
28139
29138
30138
31138

How December really feels in Tsuma

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.

Tsuma 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° / 79710.13.6
Feb13° / 988.110.83.7
Mar15° / 11°15412.211.84.6
Apr19° / 14°17511.712.85.7
May22° / 18°20012.613.66.1
Jun25° / 22°38717.614.15.3
Jul28° / 25°22414.113.95.3
Aug29° / 26°21015.613.24.9
Sep27° / 24°26815.412.25.7
Oct23° / 20°17410.511.26.9
Nov19° / 15°1088.510.46.4
Dec14° / 10°806.39.94.8

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 57% 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 29%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16535
26535
36535
46634
56733
66733
76931
86931
97030
107030
117030
127030
137129
147129
157129
167129
177129
187129
197228
207228
217228
227327
237327
247327
257426
267426
277426
287525
297525
307525
317525

Chance of precipitation in December

Any precipitation

Tsuma gets around 80 mm of rain over 6.3 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 28% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%40%151015202531
Rain chance (%)
128
227
327
426
526
625
724
823
923
1022
1121
1221
1321
1420
1520
1619
1719
1819
1919
2018
2118
2218
2318
2417
2517
2617
2717
2817
2917
3017
3117

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 94% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)
186104
287103
38893
48893
58983
69082
79172
89172
99271
109361
119361
129361
139361
149361
159460
169550
179550
189550
199550
209550
219640
229640
239640
249640
259730
269730
279730
289730
299820
309820
319820

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.

051015151015202531
Wind speed (km/h)Feels
112light breeze
212light breeze
312light breeze
412light breeze
512light breeze
612light breeze
712light breeze
812light breeze
912light breeze
1012light breeze
1112light breeze
1212light breeze
1312light breeze
1412light breeze
1512light breeze
1612light breeze
1712light breeze
1812light breeze
1912light 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 10 h 06 min at the start of December to 9 h 54 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 12 minutes over December. Sunrise moves from 7:03 AM to 7:20 AM, and sunset from 5:06 PM to 5:15 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
110.17:035:06
210.07:035:06
310.07:045:06
410.07:055:06
510.07:065:06
610.07:075:06
710.07:075:06
810.07:085:06
910.07:095:06
109.97:095:06
119.97:105:06
129.97:115:07
139.97:115:07
149.97:125:07
159.97:135:07
169.97:135:08
179.97:145:08
189.97:145:09
199.97:155:09
209.97:165:09
219.97:165:10
229.97:165:10
239.97:175:11
249.97:175:11
259.97:185:12
269.97:185:12
279.97:195:13
289.97:195:13
299.97:195:14
309.97:205:15
319.97:205:15

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 2.72 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 2.72 kWh/m² to a high of 5.12 kWh/m² in July across the year — December's 2.72 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
172.7Moderate
182.7Moderate
192.7Moderate
202.7Moderate
212.8Moderate
222.8Moderate
232.8Moderate
242.8Moderate
252.8Moderate
262.8Moderate
272.9Moderate
282.9Moderate
292.9Moderate
302.9Moderate
312.9Moderate
Planning a trip in December

Hazard calendar for Tsuma

In seasonPeak

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

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

Tsuma'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 Tsuma?

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

4.8
Sightseeing
9th-best month of the year
0.1
Beach & pool
10th-best month of the year

December is a reasonable time to visit Tsuma for sightseeing.

What to pack for Tsuma in December

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

In December, Tsuma sees daytime highs around 14°C and nights near 10°C. Worth packing: a warm layer. About 6 days see rain.

a warm layer

Sea temperature near Tsuma 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 21 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 22 to Jan 1 — about 8.4 months when the water holds above 20°C.

20°25°30°JanFebMarAprMayJunJulAugSepOctNovDeccoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan19Cool
Feb18Cool
Mar18Cool
Apr20Cool
May22Refreshing
Jun24Refreshing
Jul26Warm
Aug28Warm
Sep27Warm
Oct25Warm
Nov23Refreshing
Dec21Refreshing

UV index in Tsuma 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 Tsuma 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
May9Very high
Jun11Extreme
Jul11Extreme
Aug10Very high
Sep10Very high
Oct7High
Nov5Moderate
Dec3Moderate

Air quality in Tsuma 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 Tsuma is worst in March — around 26 µg/m³ PM2.5 (moderate), about 1.9× the cleanest month (July, 14 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateMar 2025 µg/m³Jul 2214 µg/m³
PM2.5 (µg/m³)Level
Jan17Moderate
Feb20Moderate
Mar26Moderate
Apr23Moderate
May22Moderate
Jun18Moderate
Jul14Moderate
Aug14Moderate
Sep14Moderate
Oct15Moderate
Nov16Moderate
Dec15Moderate
Location & terrain

Where is Tsuma?

Tsuma sits at 32.1°N, 131.4°E, 11 m above sea level, in Japan. The nearest listed city is Saito, 2.0 km away.

Topography around Tsuma

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

Within 3 km, the terrain around Tsuma has only modest variations in elevation — a maximum elevation change of 131 m around an average of 30 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 1,020 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,714 m.

The land around Tsuma is covered by cropland (38%), trees (29%) and artificial surfaces (23%) within 3 km, trees (59%) within 16 km, and trees (64%) and water (28%) within 80 km.

3 km
131 m
16 km
1,020 m
80 km
1,714 m
treesgrasslandcroplandartificial surfaceswater
December weather nearby: Saito 2.0 km · Shintomi 9.0 km · Takanabe 10 km · Kawaminami 14 km · Honjō 14 km · Miyazaki 20 km · Kobayashi 41 km · Hyūga 42 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 Tsuma (32.1°, 131.4°, elevation 11 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).