Tsu weather in December

In December, Tsu sees average daytime highs of 11°C and overnight lows near 5°C, with 69 mm of precipitation across 7.2 wet days and about 9.7 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 9°C by the end. The sky is clear or mostly clear about 53% of the time in December, and the air most often feels dry.

Daylight stretches from about 9 h 48 min at the start of December to 9 h 42 min by month's end. Set against the rest of the year, December is Tsu's 1st-clearest and 4th-windiest month. For the whole year in context, see Tsu's year-round climate.

Daytime high
11°
10th warmest
Overnight low
3rd coldest
Precipitation
69 mm
7.2 wet days
Daylight
9 h 42 min
7:00 AM – 4:41 PM
Cloud cover
44%
1st clearest
Wind
14 km/h
4th windiest
Solar energy
2.48 kWh/m²
Travel score
2.9
out of 10

Tsu is city in Mie Prefecture, Japan.

Density
386/km²
people per km²
Founded
1889

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 13°C in the first days to 9°C by the end.

A typical December day in Tsu reaches about 11°C in the afternoon and slips back to 5°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 7°C and 14°C. Set against its neighbours, December runs about 5°C cooler than November and about 3°C warmer than January.

10°15°20°151015202531
Avg high (°C)Avg low (°C)
1137
2137
3136
4136
5126
6126
7126
8126
9125
10115
11115
12115
13115
14115
15115
16115
17104
18104
19104
20104
21104
22104
23104
24104
25104
2694
2794
2893
2993
3093
3193

How December really feels in Tsu

Once humidity and wind are folded in, December averages 0 days that feel above 32°C and 5 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
5
wind chill below the day's low

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

Tsu 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 / 686.40.89.91.6
Feb / 737.61.110.71.9
Mar13° / 12911.60.411.73.4
Apr17° / 10°14610.6012.85.4
May22° / 14°17511.9013.86.2
Jun25° / 19°23515.3014.35.6
Jul29° / 23°22117.9014.14.5
Aug30° / 24°17915.8013.34.4
Sep27° / 21°25315.5012.25.6
Oct21° / 15°23011.8011.16.4
Nov16° / 1068.2010.25.3
Dec11° / 697.20.49.72.9

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 53% of the time in December, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 18% of December, with mostly cloudy or overcast conditions the remaining 30%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16634
26634
36733
46733
56733
66832
76931
86931
97030
107030
116931
127030
137030
147030
157030
167129
177030
187129
197129
207129
217228
227228
237228
247327
257327
267327
277426
287426
297426
307327
317327

Chance of precipitation in December

Any precipitationSnow

Tsu gets around 69 mm of rain and snow over 7.2 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 22% and peaks near 26% on the wettest days, and about 0 day brings snow.

0%10%20%30%40%151015202531
Rain chance (%)Snow chance (%)
1260
2250
3251
4251
5241
6241
7241
8231
9231
10221
11221
12221
13221
14221
15221
16221
17221
18221
19221
20221
21221
22221
23221
24222
25222
26222
27212
28211
29211
30201
31201

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 100% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)
1982
2991
3991
4991
5991
6991
7991
81000
91000
101000
111000
121000
131000
141000
151000
161000
171000
181000
191000
201000
211000
221000
231000
241000
251000
261000
271000
281000
291000
301000
311000

Wind in December

Winds average 14 km/h in December.

Across December, daily wind ranges from about 13 km/h on the calmest days to 15 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
113light breeze
213light breeze
313light breeze
413light breeze
513light breeze
613light breeze
713light breeze
814light breeze
914light breeze
1014light breeze
1114light breeze
1214light breeze
1314light breeze
1414light breeze
1514light breeze
1614light breeze
1714light breeze
1814light breeze
1914light breeze
2014light breeze
2114light breeze
2214light breeze
2315light breeze
2415light breeze
2515light breeze
2615light breeze
2715light breeze
2815light breeze
2915light breeze
3015light breeze
3115light breeze

Sunrise & sunset in December

DaylightNight

Daylight runs from about 9 h 48 min at the start of December to 9 h 42 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 6:49 AM to 7:06 AM, and sunset from 4:39 PM to 4:48 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
19.86:494:39
29.86:494:39
39.86:504:39
49.86:514:39
59.86:524:39
69.86:534:39
79.86:534:39
89.76:544:39
99.76:554:39
109.76:564:39
119.76:564:39
129.76:574:39
139.76:584:40
149.76:584:40
159.76:594:40
169.77:004:41
179.77:004:41
189.77:014:41
199.77:014:42
209.77:024:42
219.77:024:42
229.77:034:43
239.77:034:43
249.77:044:44
259.77:044:44
269.77:054:45
279.77:054:46
289.77:054:46
299.77:064:47
309.77:064:47
319.77:064:48

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 2.48 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 2.48 kWh/m² to a high of 5.59 kWh/m² in May across the year — December's 2.48 kWh/m² sits near the bottom.

0123151015202531
Solar energy (kWh/m²)Level
12.5Moderate
22.5Moderate
32.5Moderate
42.5Moderate
52.5Moderate
62.5Moderate
72.5Moderate
82.5Moderate
92.5Moderate
102.5Moderate
112.5Moderate
122.5Moderate
132.5Moderate
142.5Moderate
152.5Moderate
162.5Moderate
172.5Moderate
182.5Moderate
192.5Moderate
202.5Moderate
212.5Moderate
222.5Moderate
232.5Moderate
242.5Moderate
252.6Moderate
262.6Moderate
272.6Moderate
282.6Moderate
292.6Moderate
302.6Moderate
312.6Moderate
Planning a trip in December

Hazard calendar for Tsu

In seasonPeak

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

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

Pacific typhoon
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is December a good time to visit Tsu?

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

2.9
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 Tsu.

What to pack for Tsu in December

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

In December, Tsu sees daytime highs around 11°C and nights near 5°C. Pack a warm layer. About 7 days see rain.

a warm layer

Sea temperature near Tsu in December

The nearest coast averages about 17°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 16 km away) is warmest in August at about 27°C and coldest in February near 14°C.

It's comfortable for a long swim from May 31 to Nov 11 — about 5.4 months when the water holds above 20°C.

10°15°20°25°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan14Bracing
Feb14Bracing
Mar14Bracing
Apr15Cool
May19Cool
Jun22Refreshing
Jul25Warm
Aug27Warm
Sep26Warm
Oct23Refreshing
Nov20Cool
Dec17Cool

UV index in Tsu 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 Tsu peaks around June 22 at about 10 (very high) — 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 — in 10 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highModerateJun 22UV 10Dec 23UV 3
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar5High
Apr7High
May8Very high
Jun10Very high
Jul10Very high
Aug9Very high
Sep9Very high
Oct6High
Nov4Moderate
Dec3Moderate

Air quality in Tsu 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 Tsu is worst in March — around 26 µg/m³ PM2.5 (moderate), about 1.6× the cleanest month (July, 16 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateMar 2326 µg/m³Jul 2316 µg/m³
PM2.5 (µg/m³)Level
Jan19Moderate
Feb21Moderate
Mar26Moderate
Apr26Moderate
May24Moderate
Jun20Moderate
Jul16Moderate
Aug16Moderate
Sep17Moderate
Oct19Moderate
Nov21Moderate
Dec18Moderate
Location & terrain

Where is Tsu?

Tsu sits at 34.7°N, 136.5°E, 1 m above sea level, in Japan. The nearest listed city is Kawage, 8.0 km away.

Topography around Tsu

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

Within 3 km, the terrain around Tsu has only modest variations in elevation — a maximum elevation change of 51 m around an average of 6 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 816 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,738 m.

The land around Tsu is covered by artificial surfaces (49%) and water (31%) within 3 km, water (37%) and trees (27%) within 16 km, and trees (44%) and water (29%) within 80 km.

3 km
51 m
16 km
816 m
80 km
1,738 m
treesgrasslandcroplandartificial surfacesbare terrainwater
December weather nearby: Kawage 8.0 km · Hisai-motomachi 9.0 km · Kameyama 14 km · Matsusaka 17 km · Suzuka 18 km · Saikū 25 km · Yokkaichi 28 km · Komono 30 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 Tsu (34.7333°, 136.5167°, elevation 1 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).