Kasugai weather in December

In December, Kasugai sees average daytime highs of 12°C and overnight lows near 2°C, with 55 mm of precipitation across 6 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 14°C in the first days to 10°C by the end. The sky is clear or mostly clear about 54% 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 Kasugai's 1st-clearest and 6th-windiest month. For the whole year in context, see Kasugai's year-round climate.

Daytime high
12°
10th warmest
Overnight low
3rd coldest
Precipitation
55 mm
6 wet days
Daylight
9 h 36 min
6:59 AM – 4:37 PM
Cloud cover
43%
1st clearest
Wind
8 km/h
6th windiest
Solar energy
2.49 kWh/m²
Travel score
3.5
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 10°C by the end.

A typical December day in Kasugai reaches about 12°C in the afternoon and slips back to 2°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 8°C and 15°C. Set against its neighbours, December runs about 5°C cooler than November and about 2°C warmer than January.

-5°10°15°20°151015202531
Avg high (°C)Avg low (°C)
1144
2144
3144
4144
5134
6134
7133
8133
9133
10123
11123
12123
13123
14122
15122
16122
17112
18112
19112
20112
21112
22111
23111
24111
25111
26101
27101
28101
29101
30101
31101

How December really feels in Kasugai

Once humidity and wind are folded in, December averages 0 days that feel above 32°C and 18 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
18
wind chill below the day's low

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

Kasugai 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 / 545.70.39.92.2
Feb11° / 606.50.610.72.7
Mar14° / 11010.1011.74.3
Apr19° / 12310.6012.96.1
May24° / 14°14410.6013.86.7
Jun27° / 19°17814.3014.35.5
Jul31° / 23°19015014.14.0
Aug32° / 24°11211.8013.33.7
Sep29° / 20°18612.1012.25.3
Oct23° / 14°17110.3011.16.8
Nov17° / 857.2010.15.9
Dec12° / 5560.19.73.5

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 54% of the time in December, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 17% of December, with mostly cloudy or overcast conditions the remaining 30%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16535
26436
36535
46634
56634
66634
76733
86832
96931
106931
117030
127030
136931
146931
157030
167129
177129
187129
197129
207228
217228
227426
237426
247426
257426
267426
277426
287426
297426
307426
317426

Chance of precipitation in December

Any precipitation

Kasugai gets around 55 mm of rain and snow over 6 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 19% and peaks near 20% on the wettest days, and about 0 day brings snow.

0%10%20%30%151015202531
Rain chance (%)
120
220
320
420
519
619
719
819
919
1019
1119
1219
1319
1419
1519
1619
1719
1819
1919
2019
2119
2219
2319
2419
2519
2618
2718
2818
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 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
10991
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 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
229calm
239calm
249calm
259calm
269calm
279calm
289calm
299calm
309calm
319calm

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 6:48 AM to 7:06 AM, and sunset from 4:36 PM to 4:45 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
19.86:484:36
29.86:494:36
39.86:504:36
49.86:514:36
59.76:514:36
69.76:524:36
79.76:534:36
89.76:544:36
99.76:544:36
109.76:554:36
119.76:564:36
129.76:574:36
139.76:574:37
149.66:584:37
159.66:594:37
169.66:594:37
179.67:004:38
189.67:004:38
199.67:014:38
209.67:014:39
219.67:024:39
229.67:024:40
239.67:034:40
249.67:034:41
259.67:044:41
269.67:044:42
279.67:044:42
289.67:054:43
299.67:054:44
309.67:054:44
319.77:064:45

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 2.49 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 2.49 kWh/m² to a high of 5.46 kWh/m² in May across the year — December's 2.49 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
232.6Moderate
242.6Moderate
252.6Moderate
262.6Moderate
272.6Moderate
282.6Moderate
292.7Moderate
302.7Moderate
312.7Moderate
Planning a trip in December

Hazard calendar for Kasugai

In seasonPeak

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

Kasugai 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 Kasugai?

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

3.5
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 Kasugai.

What to pack for Kasugai in December

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

In December, Kasugai sees daytime highs around 12°C and nights near 2°C. Pack a warm layer. About 6 days see rain.

a warm layer

Sea temperature near Kasugai 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 42 km away) is warmest in August at about 27°C and coldest in February near 13°C.

It's comfortable for a long swim from May 31 to Nov 9 — about 5.4 months when the water holds above 20°C.

10°15°20°25°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan14Bracing
Feb13Bracing
Mar14Bracing
Apr15Cool
May18Cool
Jun22Refreshing
Jul25Warm
Aug27Warm
Sep26Warm
Oct22Refreshing
Nov19Cool
Dec17Cool

UV index in Kasugai in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 2. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Kasugai peaks around July 13 at about 10 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 at about 2 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highModerateJul 13UV 10Dec 22UV 2
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar5Moderate
Apr7High
May8Very high
Jun9Very high
Jul10Very high
Aug9Very high
Sep9Very high
Oct6High
Nov3Moderate
Dec2Moderate

Air quality in Kasugai 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 Kasugai 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 Kasugai?

Kasugai sits at 35.2°N, 137.0°E, 30 m above sea level, in Japan. The nearest listed city is Toyoyama, 5.0 km away.

Topography around Kasugai

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

Within 3 km, the terrain around Kasugai has only modest variations in elevation — a maximum elevation change of 81 m around an average of 27 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 434 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,181 m.

The land around Kasugai is covered by artificial surfaces (83%) within 3 km, artificial surfaces (61%) and trees (28%) within 16 km, and trees (63%) within 80 km.

3 km
81 m
16 km
434 m
80 km
2,181 m
treesgrasslandcroplandartificial surfacesbare terrainwater
December weather nearby: Toyoyama 5.0 km · Komaki 6.0 km · Owariasahi 7.0 km · Kitanagoya 9.0 km · Nagoya 9.0 km · Iwakura 10 km · Nagakute 11 km · Seto 12 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 Kasugai (35.2476°, 136.9723°, elevation 30 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).