Kudamatsu weather in December

In December, Kudamatsu sees average daytime highs of 11°C and overnight lows near 7°C, with 69 mm of precipitation across 9.8 wet days and about 9.8 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 26% of the time in December, and the air most often feels dry.

Daylight stretches from about 9 h 54 min at the start of December to 9 h 48 min by month's end. Set against the rest of the year, December is Kudamatsu's 3rd-clearest and 2nd-windiest month. For the whole year in context, see Kudamatsu's year-round climate.

Daytime high
11°
10th warmest
Overnight low
3rd coldest
Precipitation
69 mm
9.8 wet days
Daylight
9 h 42 min
7:16 AM – 5:01 PM
Cloud cover
58%
3rd clearest
Wind
17 km/h
2nd windiest
Solar energy
2.29 kWh/m²
Travel score
2.9
out of 10

Kudamatsu is city in Yamaguchi Prefecture, Japan.

Density
625/km²
people per km²
Founded
1939

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 Kudamatsu reaches about 11°C in the afternoon and slips back to 7°C overnight — a 5°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 3°C warmer than January.

10°15°20°151015202531
Avg high (°C)Avg low (°C)
1149
2138
3138
4138
5138
6138
7128
8127
9127
10127
11127
12127
13117
14117
15117
16116
17116
18116
19116
20116
21116
22106
23106
24106
25106
26106
27105
28105
29105
30105
31105

How December really feels in Kudamatsu

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.

Kudamatsu 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 / 629.31.3101.7
Feb / 769.51.110.72.0
Mar12° / 12410.70.211.73.3
Apr17° / 11°14810.2012.85.2
May21° / 15°16910.1013.76.3
Jun24° / 20°26414.3014.25.9
Jul27° / 24°25914.70145.5
Aug29° / 25°14712.7013.35.2
Sep26° / 22°16911.5012.26.4
Oct22° / 16°1137.7011.17.1
Nov16° / 11°788.1010.25.5
Dec11° / 699.80.39.82.9

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 26% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 24% of December, with mostly cloudy or overcast conditions the remaining 50%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15743
25644
35644
45644
55545
65446
75347
85248
95149
105149
115050
124951
134951
144852
154852
164753
174852
184852
194753
204753
214753
224753
234753
244753
254753
264753
274753
284753
294753
304753
314753

Chance of precipitation in December

Any precipitationSnow

Kudamatsu gets around 69 mm of rain and snow over 9.8 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 31% and peaks near 31% on the wettest days, and about 0 day brings snow.

0%10%20%30%40%151015202531
Rain chance (%)Snow chance (%)
1300
2300
3310
4310
5310
6310
7310
8310
9310
10310
11310
12311
13311
14311
15311
16311
17311
18311
19311
20311
21311
22311
23311
24311
25312
26312
27312
28302
29302
30292
31292

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 (%)
19631
29631
39721
49721
59721
69820
79910
89910
99910
109910
119910
129910
139910
149910
159910
169910
179910
189910
1910000
2010000
2110000
2210000
2310000
2410000
2510000
2610000
2710000
2810000
2910000
3010000
3110000

Wind in December

Winds average 17 km/h in December.

Across December, daily wind ranges from about 15 km/h on the calmest days to 17 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
115light breeze
216light breeze
316light breeze
416light breeze
516light breeze
616light breeze
716light breeze
816light breeze
916light breeze
1016light breeze
1116light breeze
1217light breeze
1317light breeze
1417light breeze
1517light breeze
1617light breeze
1717light breeze
1817light breeze
1917light breeze
2017light breeze
2117light breeze
2217light breeze
2317light breeze
2417light breeze
2517light breeze
2617light breeze
2717light breeze
2817light breeze
2917light breeze
3017light breeze
3117light breeze

Sunrise & sunset in December

DaylightNight

Daylight runs from about 9 h 54 min at the start of December to 9 h 48 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 7:05 AM to 7:23 AM, and sunset from 4:59 PM to 5:09 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
19.97:054:59
29.97:064:59
39.97:074:59
49.97:084:59
59.87:094:59
69.87:094:59
79.87:104:59
89.87:114:59
99.87:124:59
109.87:125:00
119.87:135:00
129.87:145:00
139.87:145:00
149.87:155:00
159.87:165:01
169.77:165:01
179.77:175:01
189.77:175:02
199.77:185:02
209.77:195:03
219.77:195:03
229.77:205:03
239.77:205:04
249.77:205:04
259.77:215:05
269.77:215:06
279.77:225:06
289.77:225:07
299.87:225:07
309.87:235:08
319.87:235:09

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 2.29 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 2.29 kWh/m² to a high of 5.52 kWh/m² in May across the year — December's 2.29 kWh/m² sits near the bottom.

0123151015202531
Solar energy (kWh/m²)Level
12.4Moderate
22.4Moderate
32.4Moderate
42.4Moderate
52.4Moderate
62.3Moderate
72.3Moderate
82.3Moderate
92.3Moderate
102.3Moderate
112.3Moderate
122.3Moderate
132.3Moderate
142.3Moderate
152.3Moderate
162.3Moderate
172.3Moderate
182.3Moderate
192.3Moderate
202.3Moderate
212.3Moderate
222.3Moderate
232.3Moderate
242.3Moderate
252.3Moderate
262.3Moderate
272.3Moderate
282.4Moderate
292.4Moderate
302.4Moderate
312.4Moderate
Planning a trip in December

Hazard calendar for Kudamatsu

In seasonPeak

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

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

Kudamatsu's rainy season runs March–September, 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 Kudamatsu?

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

2.9
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 Kudamatsu.

What to pack for Kudamatsu in December

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

In December, Kudamatsu sees daytime highs around 11°C and nights near 7°C. Pack a warm layer. Worth having: rain gear. About 10 days see rain.

a warm layerrain gear

Sea temperature near Kudamatsu 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 15 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 Jun 9 to Nov 16 — about 5.3 months when the water holds above 20°C.

10°15°20°25°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan14Bracing
Feb13Bracing
Mar13Bracing
Apr15Bracing
May17Cool
Jun21Refreshing
Jul25Warm
Aug27Warm
Sep25Warm
Oct23Refreshing
Nov20Refreshing
Dec17Cool

UV index in Kudamatsu 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 Kudamatsu peaks around June 23 at about 10 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 21 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 highModerateJun 23UV 10Dec 21UV 3
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar6High
Apr7Very high
May8Very high
Jun10Very high
Jul10Very high
Aug9Very high
Sep9Very high
Oct6High
Nov4Moderate
Dec3Moderate

Air quality in Kudamatsu 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 Kudamatsu is worst in April — around 23 µg/m³ PM2.5 (moderate), about 2.0× the cleanest month (October, 11 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateModerateApr 1323 µg/m³Oct 1612 µg/m³
PM2.5 (µg/m³)Level
Jan15Moderate
Feb18Moderate
Mar23Moderate
Apr23Moderate
May22Moderate
Jun19Moderate
Jul17Moderate
Aug16Moderate
Sep13Moderate
Oct11Good
Nov13Moderate
Dec13Moderate
Location & terrain

Where is Kudamatsu?

Kudamatsu sits at 34.0°N, 131.9°E, 13 m above sea level, in Japan. The nearest listed city is Tokuyama, 6.0 km away.

Topography around Kudamatsu

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

Within 3 km, the terrain around Kudamatsu has significant variations in elevation — a maximum elevation change of 270 m around an average of 37 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 694 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,369 m.

The land around Kudamatsu is covered by artificial surfaces (36%), trees (33%) and water (27%) within 3 km, trees (48%) and water (41%) within 16 km, and water (49%) and trees (44%) within 80 km.

3 km
270 m
16 km
694 m
80 km
1,369 m
treesgrasslandcroplandartificial surfacesbare terrainwater
December weather nearby: Tokuyama 6.0 km · Shūnan 9.0 km · Hikari 10 km · Yanai 24 km · Hōfu 28 km · Iwakuni 37 km · Ōtake 39 km · Yamaguchi 42 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 Kudamatsu (34.0096°, 131.8664°, elevation 13 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).