Sōja weather in December

In December, Sōja sees average daytime highs of 11°C and overnight lows near 2°C, with 49 mm of precipitation across 5.5 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 10°C by the end. The sky is clear or mostly clear about 36% 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 Sōja's 2nd-clearest and 4th-windiest month. For the whole year in context, see Sōja's year-round climate.

Daytime high
11°
10th warmest
Overnight low
3rd coldest
Precipitation
49 mm
5.5 wet days
Daylight
9 h 42 min
7:11 AM – 4:52 PM
Cloud cover
52%
2nd clearest
Wind
9 km/h
4th windiest
Solar energy
2.36 kWh/m²
Travel score
3.3
out of 10

Sōja is City in Okayama Prefecture, Japan.

Density
326/km²
people per km²
Founded
2005

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 10°C by the end.

A typical December day in Sōja reaches about 11°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 7°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
3134
4134
5134
6133
7133
8123
9123
10123
11123
12123
13123
14112
15112
16112
17112
18112
19112
20112
21112
22112
23102
24102
25102
26101
27101
28101
29101
30101
31101

How December really feels in Sōja

Once humidity and wind are folded in, December averages 0 days that feel above 32°C and 20 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
20
wind chill below the day's low

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

Sōja 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 / 425.60.69.92.0
Feb10° / 506.6110.72.4
Mar14° / 969.90.211.74.0
Apr19° / 11510012.86.1
May24° / 14°13310.4013.86.7
Jun27° / 19°18312.6014.35.7
Jul31° / 23°19914.1014.14.1
Aug32° / 24°12311.1013.33.7
Sep28° / 20°18211.4012.25.6
Oct23° / 13°1158.1011.17.1
Nov17° / 596.5010.25.9
Dec11° / 495.50.29.73.3

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 36% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 27% of December, with mostly cloudy or overcast conditions the remaining 38%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16337
26337
36337
46337
56436
66337
76337
86337
96238
106238
116238
126139
136139
146040
156139
166040
176040
186139
196139
206139
216238
226238
236337
246337
256337
266436
276436
286436
296436
306436
316436

Chance of precipitation in December

Any precipitation

Sōja gets around 49 mm of rain and snow over 5.5 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 17% and peaks near 21% on the wettest days, and about 0 day brings snow.

0%10%20%30%151015202531
Rain chance (%)
121
221
321
421
520
620
720
819
919
1018
1118
1218
1317
1417
1517
1617
1716
1816
1916
2016
2116
2216
2316
2416
2516
2616
2715
2815
2915
3015
3115

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
11991
12991
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 10 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
1910calm
2010calm
2110calm
2210calm
2310calm
2410calm
2510calm
2610calm
2710calm
2810calm
2910calm
3010calm
3110calm

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 6:59 AM to 7:17 AM, and sunset from 4:50 PM to 4:59 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
19.86:594:50
29.87:004:50
39.87:014:50
49.87:024:50
59.87:034:50
69.87:044:50
79.87:044:50
89.87:054:50
99.77:064:50
109.77:074:50
119.77:074:51
129.77:084:51
139.77:094:51
149.77:094:51
159.77:104:51
169.77:114:52
179.77:114:52
189.77:124:52
199.77:124:53
209.77:134:53
219.77:134:54
229.77:144:54
239.77:144:55
249.77:154:55
259.77:154:56
269.77:154:56
279.77:164:57
289.77:164:57
299.77:164:58
309.77:174:59
319.77:174:59

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 2.36 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 2.36 kWh/m² to a high of 5.62 kWh/m² in May across the year — December's 2.36 kWh/m² sits near the bottom.

0123151015202531
Solar energy (kWh/m²)Level
12.5Moderate
22.4Moderate
32.4Moderate
42.4Moderate
52.4Moderate
62.4Moderate
72.4Moderate
82.4Moderate
92.4Moderate
102.4Moderate
112.4Moderate
122.4Moderate
132.3Moderate
142.3Moderate
152.3Moderate
162.3Moderate
172.3Moderate
182.4Moderate
192.4Moderate
202.4Moderate
212.4Moderate
222.4Moderate
232.4Moderate
242.4Moderate
252.4Moderate
262.4Moderate
272.4Moderate
282.5Moderate
292.5Moderate
302.5Moderate
312.5Moderate
Planning a trip in December

Hazard calendar for Sōja

In seasonPeak

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

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

Sōja'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 Sōja?

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

3.3
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 Sōja.

What to pack for Sōja in December

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

In December, Sōja sees daytime highs around 11°C and nights near 2°C. Pack a warm layer. About 6 days see rain.

a warm layer

Sea temperature near Sōja 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 35 km away) is warmest in August at about 28°C and coldest in February near 13°C.

It's comfortable for a long swim from Jun 3 to Nov 12 — 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
Mar13Bracing
Apr15Bracing
May18Cool
Jun22Refreshing
Jul25Warm
Aug28Warm
Sep27Warm
Oct23Refreshing
Nov20Cool
Dec16Cool

UV index in Sōja 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 Sōja peaks around July 15 at about 10 (extreme) — 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 highExtremeVery highModerateJul 15UV 10Dec 23UV 3
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar5High
Apr7Very high
May8Very high
Jun10Very high
Jul10Extreme
Aug9Very high
Sep9Very high
Oct6High
Nov4Moderate
Dec3Moderate

Air quality in Sōja 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 Sōja is worst in April — around 24 µg/m³ PM2.5 (moderate), about 1.7× the cleanest month (December, 14 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateApr 1324 µg/m³Dec 1414 µg/m³
PM2.5 (µg/m³)Level
Jan16Moderate
Feb19Moderate
Mar23Moderate
Apr24Moderate
May22Moderate
Jun20Moderate
Jul17Moderate
Aug17Moderate
Sep16Moderate
Oct14Moderate
Nov15Moderate
Dec14Moderate
Location & terrain

Where is Sōja?

Sōja sits at 34.7°N, 133.8°E, 19 m above sea level, in Japan. The nearest listed city is Kurashiki, 10 km away.

Topography around Sōja

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

Within 3 km, the terrain around Sōja has significant variations in elevation — a maximum elevation change of 292 m around an average of 27 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 588 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,692 m.

The land around Sōja is covered by artificial surfaces (40%), trees (25%) and cropland (24%) within 3 km, trees (59%) and artificial surfaces (23%) within 16 km, and trees (65%) and water (23%) within 80 km.

3 km
292 m
16 km
588 m
80 km
1,692 m
treesgrasslandcroplandartificial surfacesbare terrainwater
December weather nearby: Kurashiki 10 km · Okayama 17 km · Takahashi 17 km · Asakuchi 21 km · Kamogatachō-kamogata 21 km · Tamano 25 km · Ibara 27 km · Akaiwa 29 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 Sōja (34.6753°, 133.7509°, elevation 19 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).