Toyohama weather in December

In December, Toyohama sees average daytime highs of 12°C and overnight lows near 8°C, with 68 mm of precipitation across 8.5 wet days and about 9.7 hours of daylight. It is the 10th-warmest and 12th-wettest month of the year here.

Highs ease over the month, from about 14°C in the first days to 11°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 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 Toyohama's 1st-clearest and 3rd-windiest month. For the whole year in context, see Toyohama's year-round climate.

Daytime high
12°
10th warmest
Overnight low
4th coldest
Precipitation
68 mm
8.5 wet days
Daylight
9 h 42 min
6:58 AM – 4:39 PM
Cloud cover
40%
1st clearest
Wind
25 km/h
3rd windiest
Solar energy
2.59 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 11°C by the end.

A typical December day in Toyohama reaches about 12°C in the afternoon and slips back to 8°C overnight — a 4°C spread between the day's warmth and the night's chill. On most days the high lands between 9°C and 15°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)
11410
21410
31410
41410
51410
6139
7139
8139
9139
10139
11139
12128
13128
14128
15128
16128
17128
18128
19127
20117
21117
22117
23117
24117
25117
26117
27117
28117
29117
30116
31106

How December really feels in Toyohama

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.

Toyohama weather by month

How December compares with the rest of the year at a glance. December is the 10th-warmest and 12th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan10° / 739.30.59.92.2
Feb10° / 769.10.410.72.4
Mar13° / 12010.5011.73.6
Apr17° / 12°1299.9012.85.3
May20° / 16°15410013.86.3
Jun24° / 21°20913.2014.36.0
Jul27° / 24°18113014.15.8
Aug29° / 26°10810.9013.35.7
Sep26° / 23°21413012.26.2
Oct22° / 18°21511.1011.16.6
Nov17° / 13°998010.25.8
Dec12° / 688.50.19.73.5

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 17% 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 (%)
16832
26931
36931
46931
56931
67030
77030
87129
97129
107228
117228
127228
137327
147327
157327
167327
177426
187426
197426
207525
217525
227525
237525
247624
257624
267624
277723
287723
297723
307723
317723

Chance of precipitation in December

Any precipitation

Toyohama gets around 68 mm of rain and snow over 8.5 wet days in December, the driest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 27% and peaks near 28% on the wettest days, and about 0 day brings snow.

0%10%20%30%40%151015202531
Rain chance (%)
127
226
326
426
526
626
726
826
926
1026
1126
1226
1326
1426
1526
1626
1726
1827
1927
2027
2127
2228
2328
2428
2528
2628
2728
2828
2928
3028
3128

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 (%)Humid (%)
19541
29631
39631
49730
59730
69730
79820
89820
99820
109820
119910
129910
139910
149910
159910
169910
179910
1810000
1910000
2010000
2110000
2210000
2310000
2410000
2510000
2610000
2710000
2810000
2910000
3010000
3110000

Wind in December

Winds average 25 km/h in December.

Across December, daily wind ranges from about 23 km/h on the calmest days to 27 km/h at its breeziest. It stays fairly steady from day to day.

0102030151015202531
Wind speed (km/h)Feels
123breezy
223breezy
324breezy
424breezy
524breezy
624breezy
724breezy
824breezy
924breezy
1025breezy
1125breezy
1225breezy
1325breezy
1425breezy
1525breezy
1625breezy
1725breezy
1825breezy
1925breezy
2025breezy
2126breezy
2226breezy
2326breezy
2426breezy
2526breezy
2626breezy
2726breezy
2826breezy
2926breezy
3026breezy
3127breezy

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 6:47 AM to 7:04 AM, and sunset from 4:37 PM to 4:46 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
19.86:474:37
29.86:484:37
39.86:484:37
49.86:494:37
59.86:504:37
69.86:514:37
79.86:524:37
89.76:524:37
99.76:534:37
109.76:544:38
119.76:554:38
129.76:554:38
139.76:564:38
149.76:574:38
159.76:574:39
169.76:584:39
179.76:584:39
189.76:594:40
199.77:004:40
209.77:004:40
219.77:014:41
229.77:014:41
239.77:024:42
249.77:024:42
259.77:024:43
269.77:034:43
279.77:034:44
289.77:044:45
299.77:044:45
309.77:044:46
319.77:044:46

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 2.59 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 2.59 kWh/m² to a high of 5.57 kWh/m² in May across the year — December's 2.59 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
222.6Moderate
232.7Moderate
242.7Moderate
252.7Moderate
262.7Moderate
272.7Moderate
282.7Moderate
292.8Moderate
302.8Moderate
312.8Moderate
Planning a trip in December

Hazard calendar for Toyohama

In seasonPeak

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

Toyohama 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 Toyohama?

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 Toyohama.

What to pack for Toyohama in December

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

In December, Toyohama sees daytime highs around 12°C and nights near 8°C. Worth packing: a warm layer, rain gear and a windbreaker. About 9 days see rain.

a warm layerrain geara windbreaker

Sea temperature near Toyohama 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 offshore is warmest in August at about 27°C and coldest in February near 14°C.

It's comfortable for a long swim from May 30 to Nov 13 — about 5.5 months when the water holds above 20°C.

10°15°20°25°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan15Bracing
Feb14Bracing
Mar14Bracing
Apr16Cool
May19Cool
Jun22Refreshing
Jul25Warm
Aug27Warm
Sep26Warm
Oct23Refreshing
Nov20Cool
Dec17Cool

UV index in Toyohama 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 Toyohama peaks around July 10 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 10UV 10Dec 22UV 2
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar5Moderate
Apr7High
May8Very high
Jun10Very high
Jul10Very high
Aug8Very high
Sep9Very high
Oct6High
Nov4Moderate
Dec2Moderate

Air quality in Toyohama 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 Toyohama is worst in April — around 25 µg/m³ PM2.5 (moderate), about 1.6× the cleanest month (July, 15 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateApr 1325 µg/m³Jul 2415 µg/m³
PM2.5 (µg/m³)Level
Jan17Moderate
Feb19Moderate
Mar25Moderate
Apr25Moderate
May24Moderate
Jun20Moderate
Jul15Moderate
Aug15Moderate
Sep16Moderate
Oct18Moderate
Nov18Moderate
Dec16Moderate
Location & terrain

Where is Toyohama?

Toyohama sits at 34.7°N, 136.9°E, 3 m above sea level, in Japan. The nearest listed city is Minamichita, 7.0 km away.

Topography around Toyohama

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

Within 3 km, the terrain around Toyohama has only modest variations in elevation — a maximum elevation change of 113 m around an average of 25 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 128 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,297 m.

The land around Toyohama is covered by water (44%) and trees (38%) within 3 km, water (79%) within 16 km, and trees (40%) and water (36%) within 80 km.

3 km
113 m
16 km
128 m
80 km
1,297 m
treesgrasslandcroplandartificial surfaceswater
December weather nearby: Minamichita 7.0 km · Ishiki 13 km · Kaminoma 13 km · Taketoyo 16 km · Handa 19 km · Hekinan 20 km · Nishio 20 km · Tokoname 21 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 Toyohama (34.7093°, 136.9342°, elevation 3 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).