Shinshiro weather in December

In December, Shinshiro sees average daytime highs of 10°C and overnight lows near 2°C, with 73 mm of precipitation across 7 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 12°C in the first days to 8°C by the end. The sky is clear or mostly clear about 58% 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 Shinshiro's 1st-clearest and 4th-windiest month. For the whole year in context, see Shinshiro's year-round climate.

Daytime high
10°
10th warmest
Overnight low
3rd coldest
Precipitation
73 mm
7 wet days
Daylight
9 h 42 min
6:56 AM – 4:36 PM
Cloud cover
39%
1st clearest
Wind
11 km/h
4th windiest
Solar energy
2.58 kWh/m²
Travel score
2.6
out of 10

Shinshiro is city in Aichi prefecture, Japan.

Founded
1958

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 12°C in the first days to 8°C by the end.

A typical December day in Shinshiro reaches about 10°C in the afternoon and slips back to 2°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 6°C and 14°C. Set against its neighbours, December runs about 6°C cooler than November and about 3°C warmer than January.

-5°10°15°20°151015202531
Avg high (°C)Avg low (°C)
1134
2124
3124
4124
5124
6124
7113
8113
9113
10113
11113
12103
13102
14102
15102
16102
17102
18102
1992
2092
2192
2292
2391
2491
2591
2691
2791
2891
2981
3081
3181

How December really feels in Shinshiro

Once humidity and wind are folded in, December averages 0 days that feel above 32°C and 22 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
22
wind chill below the day's low

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

Shinshiro 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 / 706.71.19.91.3
Feb / 897.41.210.71.8
Mar12° / 16011.70.311.73.3
Apr18° / 17811.9012.95.3
May22° / 13°19713.1013.86.1
Jun25° / 18°28017.9014.35.2
Jul29° / 22°32720.4014.14.2
Aug30° / 22°20118.7013.34.1
Sep26° / 19°26216.5012.25.4
Oct21° / 13°21913.3011.16.1
Nov16° / 1188.7010.25.1
Dec10° / 7370.39.72.6

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 58% of the time in December, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 15% of December, with mostly cloudy or overcast conditions the remaining 27%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16733
26733
36733
46832
56832
66931
77030
87030
97030
107228
117228
127228
137327
147327
157327
167426
177426
187426
197525
207525
217624
227723
237723
247723
257723
267822
277822
287822
297921
307921
317921

Chance of precipitation in December

Any precipitationSnow

Shinshiro gets around 73 mm of rain and snow over 7 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 25% on the wettest days, and about 0 day brings snow.

0%10%20%30%40%151015202531
Rain chance (%)Snow chance (%)
1250
2250
3250
4250
5240
6240
7240
8230
9230
10230
11220
12220
13220
14220
15220
16220
17221
18221
19221
20221
21211
22211
23212
24212
25212
26212
27212
28202
29202
30203
31203

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 (%)
1991
2991
3991
4991
5991
6991
7991
8991
9991
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 11 km/h in December.

Across December, daily wind ranges from about 10 km/h on the calmest days to 12 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
110calm
210calm
310calm
411calm
511calm
611calm
711calm
811calm
911calm
1011calm
1111calm
1211calm
1311calm
1411calm
1511calm
1611calm
1711calm
1811calm
1911calm
2011calm
2111calm
2211calm
2312calm
2412calm
2512calm
2612calm
2712calm
2812calm
2912calm
3012calm
3112calm

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 6:45 AM to 7:03 AM, and sunset from 4:35 PM to 4:44 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
19.86:454:35
29.86:464:34
39.86:474:34
49.86:484:34
59.86:484:34
69.86:494:34
79.76:504:34
89.76:514:34
99.76:514:35
109.76:524:35
119.76:534:35
129.76:544:35
139.76:544:35
149.76:554:36
159.76:564:36
169.76:564:36
179.76:574:37
189.76:574:37
199.76:584:37
209.76:584:38
219.76:594:38
229.76:594:39
239.77:004:39
249.77:004:40
259.77:014:40
269.77:014:41
279.77:014:41
289.77:024:42
299.77:024:42
309.77:024:43
319.77:034:44

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 2.58 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 2.58 kWh/m² to a high of 5.39 kWh/m² in May across the year — December's 2.58 kWh/m² sits near the bottom.

0123151015202531
Solar energy (kWh/m²)Level
12.6Moderate
22.6Moderate
32.6Moderate
42.6Moderate
52.6Moderate
62.6Moderate
72.6Moderate
82.6Moderate
92.6Moderate
102.6Moderate
112.6Moderate
122.6Moderate
132.6Moderate
142.6Moderate
152.6Moderate
162.6Moderate
172.6Moderate
182.6Moderate
192.6Moderate
202.6Moderate
212.6Moderate
222.7Moderate
232.7Moderate
242.7Moderate
252.7Moderate
262.7Moderate
272.7Moderate
282.8Moderate
292.8Moderate
302.8Moderate
312.8Moderate
Planning a trip in December

Hazard calendar for Shinshiro

In seasonPeak

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

Shinshiro 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 Shinshiro?

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

2.6
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 Shinshiro.

What to pack for Shinshiro in December

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

In December, Shinshiro sees daytime highs around 10°C and nights near 2°C. Pack a warm layer. About 7 days see rain.

a warm layer

Sea temperature near Shinshiro in December

The nearest coast averages about 18°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 33 km away) is warmest in August at about 27°C and coldest in February near 16°C.

It's comfortable for a long swim from May 26 to Nov 26 — about 6.1 months when the water holds above 20°C.

15°20°25°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan16Cool
Feb16Cool
Mar16Cool
Apr17Cool
May19Cool
Jun22Refreshing
Jul25Warm
Aug27Warm
Sep26Warm
Oct23Refreshing
Nov21Refreshing
Dec18Cool

UV index in Shinshiro 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 Shinshiro peaks around July 15 at about 10 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 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 15UV 10Dec 22UV 3
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar5Moderate
Apr7High
May9Very high
Jun10Very high
Jul10Very high
Aug9Very high
Sep9Very high
Oct6High
Nov4Moderate
Dec3Moderate

Air quality in Shinshiro 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 Shinshiro is worst in April — around 22 µg/m³ PM2.5 (moderate), about 1.6× the cleanest month (December, 13 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateApr 1322 µg/m³Dec 1813 µg/m³
PM2.5 (µg/m³)Level
Jan14Moderate
Feb17Moderate
Mar21Moderate
Apr22Moderate
May21Moderate
Jun19Moderate
Jul15Moderate
Aug14Moderate
Sep14Moderate
Oct15Moderate
Nov15Moderate
Dec13Moderate
Location & terrain

Where is Shinshiro?

Shinshiro sits at 34.9°N, 137.5°E, 48 m above sea level, in Japan. The nearest listed city is Toyokawa, 13 km away.

Topography around Shinshiro

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

Within 3 km, the terrain around Shinshiro has significant variations in elevation — a maximum elevation change of 480 m around an average of 103 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 894 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,775 m.

The land around Shinshiro is covered by trees (56%) and artificial surfaces (23%) within 3 km, trees (82%) within 16 km, and trees (49%) and water (33%) within 80 km.

3 km
480 m
16 km
894 m
80 km
2,775 m
treesgrasslandcroplandartificial surfaceswater
December weather nearby: Toyokawa 13 km · Kozakai-chō 17 km · Toyohashi 18 km · Kosai 22 km · Arai 25 km · Gamagōri 25 km · Hamakita 28 km · Kōta 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 Shinshiro (34.9°, 137.5°, elevation 48 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).