Wadayama weather in December

In December, Wadayama sees average daytime highs of 8°C and overnight lows near 1°C, with 81 mm of precipitation across 12.2 wet days and about 9.7 hours of daylight. It is the 10th-warmest and 10th-wettest month of the year here.

Highs ease over the month, from about 11°C in the first days to 7°C by the end. The sky is clear or mostly clear about 15% 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 36 min by month's end. Set against the rest of the year, December is Wadayama's 3rd-clearest and 7th-windiest month. For the whole year in context, see Wadayama's year-round climate.

Daytime high
10th warmest
Overnight low
3rd coldest
Precipitation
81 mm
12.2 wet days
Daylight
9 h 36 min
7:08 AM – 4:46 PM
Cloud cover
63%
3rd clearest
Wind
9 km/h
7th windiest
Solar energy
2.16 kWh/m²
Travel score
1.5
out of 10

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 11°C in the first days to 7°C by the end.

A typical December day in Wadayama reaches about 8°C in the afternoon and slips back to 1°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 4°C and 12°C. Set against its neighbours, December runs about 6°C cooler than November and about 3°C warmer than January.

-5°10°15°151015202531
Avg high (°C)Avg low (°C)
1113
2113
3113
4102
5102
6102
7102
8102
992
1091
1191
1291
1391
1481
1581
1681
1780
1880
1980
2080
2180
2270
2370
2470
2570
2670
277-1
287-1
297-1
307-1
317-1

How December really feels in Wadayama

Once humidity and wind are folded in, December averages 0 days that feel above 32°C and 28 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
28
wind chill below the day's low

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

Wadayama weather by month

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

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -2°7514.110.19.90.2
Feb / -2°8113.17.910.70.6
Mar11° / 13214.43.911.72.3
Apr17° / 13911.90.412.94.9
May21° / 12°16812.4013.86.1
Jun24° / 17°22215.9014.35.5
Jul28° / 21°27218.9014.14.5
Aug29° / 22°19317.3013.34.4
Sep25° / 18°25515.3012.25.7
Oct20° / 12°15710.9011.16.0
Nov14° / 8910.20.210.14.1
Dec / 8112.24.89.71.5

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 15% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 31% of December, with mostly cloudy or overcast conditions the remaining 55%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14654
24555
34555
44555
54555
64555
74555
84456
94456
104456
114456
124555
134555
144555
154555
164456
174555
184654
194654
204654
214753
224852
234852
244753
254753
264852
274753
284753
294654
304654
314654

Chance of precipitation in December

Any precipitationSnow

Wadayama gets around 81 mm of rain and snow over 12.2 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 39% and peaks near 43% on the wettest days, and about 5 days bring snow. The odds climb toward the end of the month.

0%10%20%30%40%50%151015202531
Rain chance (%)Snow chance (%)
1355
2355
3366
4367
5367
6378
7379
83710
93811
103812
113812
123813
133914
143915
153915
164016
174017
184017
194118
204119
214119
224120
234121
244121
254222
264223
274223
284224
294325
304326
314327

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
51000
61000
71000
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 9 km/h in December.

Across December, daily wind ranges from about 9 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
19calm
29calm
39calm
49calm
59calm
69calm
79calm
89calm
99calm
109calm
119calm
129calm
139calm
149calm
159calm
169calm
179calm
189calm
199calm
209calm
219calm
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 36 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 6:57 AM to 7:14 AM, and sunset from 4:44 PM to 4:53 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
19.86:574:44
29.86:574:44
39.86:584:44
49.76:594:44
59.77:004:44
69.77:014:44
79.77:024:44
89.77:024:44
99.77:034:44
109.77:044:44
119.77:054:44
129.77:054:45
139.67:064:45
149.67:074:45
159.67:074:45
169.67:084:46
179.67:084:46
189.67:094:46
199.67:104:47
209.67:104:47
219.67:114:47
229.67:114:48
239.67:124:48
249.67:124:49
259.67:124:49
269.67:134:50
279.67:134:51
289.67:134:51
299.67:144:52
309.67:144:52
319.67:144:53

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 2.16 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 2.16 kWh/m² to a high of 5.49 kWh/m² in May across the year — December's 2.16 kWh/m² sits near the bottom.

0123151015202531
Solar energy (kWh/m²)Level
12.2Moderate
22.2Moderate
32.2Moderate
42.2Moderate
52.2Moderate
62.2Moderate
72.2Moderate
82.1Moderate
92.1Moderate
102.1Moderate
112.1Moderate
122.1Moderate
132.1Moderate
142.1Moderate
152.1Moderate
162.1Moderate
172.2Moderate
182.2Moderate
192.2Moderate
202.2Moderate
212.2Moderate
222.2Moderate
232.2Moderate
242.2Moderate
252.2Moderate
262.2Moderate
272.3Moderate
282.3Moderate
292.3Moderate
302.3Moderate
312.3Moderate
Planning a trip in December

Hazard calendar for Wadayama

In seasonPeak

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

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

Wadayama's rainy season runs March–October, 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 Wadayama?

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

1.5
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 Wadayama.

What to pack for Wadayama in December

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

In December, Wadayama sees daytime highs around 8°C and nights near 1°C. Pack a warm layer. Worth having: rain gear. About 12 days see rain.

a warm layerrain gear

Sea temperature near Wadayama in December

The nearest coast averages about 16°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 34 km away) is warmest in August at about 27°C and coldest in March near 12°C.

It's comfortable for a long swim from Jun 13 to Nov 7 — about 4.9 months when the water holds above 20°C.

10°15°20°25°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan14Bracing
Feb12Bracing
Mar12Bracing
Apr14Bracing
May17Cool
Jun20Refreshing
Jul24Warm
Aug27Warm
Sep25Warm
Oct22Refreshing
Nov19Cool
Dec16Cool

UV index in Wadayama 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 Wadayama peaks around July 15 at about 10 (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 — in 10 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highVery highModerateJul 15UV 10Jan 1UV 3
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar5High
Apr7High
May8Very high
Jun10Very high
Jul10Extreme
Aug9Very high
Sep9Very high
Oct6High
Nov3Moderate
Dec3Moderate

Air quality in Wadayama 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 Wadayama is worst in April — around 22 µg/m³ PM2.5 (moderate), about 2.1× the cleanest month (October, 11 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodApr 1622 µg/m³Oct 1811 µg/m³
PM2.5 (µg/m³)Level
Jan13Moderate
Feb16Moderate
Mar21Moderate
Apr22Moderate
May21Moderate
Jun18Moderate
Jul17Moderate
Aug17Moderate
Sep13Moderate
Oct11Good
Nov12Moderate
Dec12Good
Location & terrain

Where is Wadayama?

Wadayama sits at 35.3°N, 134.9°E, 180 m above sea level, in Japan. The nearest listed city is Yabu, 13 km away.

Topography around Wadayama

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

Within 3 km, the terrain around Wadayama has significant variations in elevation — a maximum elevation change of 435 m around an average of 174 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 1,039 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,487 m.

The land around Wadayama is covered by trees (69%) within 3 km, trees (92%) within 16 km, and trees (61%) and water (29%) within 80 km.

3 km
435 m
16 km
1,039 m
80 km
1,487 m
treesgrasslandcroplandartificial surfaceswater
December weather nearby: Yabu 13 km · Tamba 22 km · Fukuchiyama 23 km · Tanba 23 km · Toyooka 25 km · Kajiya 28 km · Yotsutsuji 32 km · Ayabe 35 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 Wadayama (35.3167°, 134.8667°, elevation 180 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).