Kudamatsu weather in January

In January, Kudamatsu sees average daytime highs of 9°C and overnight lows near 4°C, with 62 mm of precipitation across 9.3 wet days and about 10 hours of daylight. It is the 12th-warmest and 12th-wettest month of the year here.

Day-to-day highs hold fairly steady near 9°C through the month. The sky is clear or mostly clear about 18% of the time in January, and the air most often feels dry.

Daylight stretches from about 9 h 48 min at the start of January to 10 h 18 min by month's end. Set against the rest of the year, January is Kudamatsu's 10th-clearest and 1st-windiest month. For the whole year in context, see Kudamatsu's year-round climate.

Daytime high
12th warmest
Overnight low
1st coldest
Precipitation
62 mm
9.3 wet days
Daylight
10 hours
7:23 AM – 5:21 PM
Cloud cover
64%
10th clearest
Wind
17 km/h
1st windiest
Solar energy
2.53 kWh/m²
Travel score
1.7
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 January

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 9°C through the month.

A typical January day in Kudamatsu reaches about 9°C in the afternoon and slips back to 4°C overnight — a 4°C spread between the day's warmth and the night's chill. On most days the high lands between 5°C and 12°C. Set against its neighbours, January runs about 3°C cooler than December and on par with February.

10°15°151015202531
Avg high (°C)Avg low (°C)
1105
2105
395
495
595
695
795
895
995
1095
1195
1294
1394
1494
1594
1694
1794
1894
1984
2084
2184
2284
2384
2484
2584
2684
2784
2884
2984
3084
3184

How January really feels in Kudamatsu

Once humidity and wind are folded in, January averages 0 days that feel above 32°C and 5 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
5
wind chill below the day's low

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

Kudamatsu weather by month

How January compares with the rest of the year at a glance. January is the 12th-warmest and 12th-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 January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 18% of the time in January.

Beyond those clear spells, partly cloudy skies cover about 22% of January, with mostly cloudy or overcast conditions the remaining 60%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14753
24654
34654
44654
54654
64654
74456
84357
94357
104258
114258
124258
134060
144060
154060
163961
173763
183763
193763
203763
213763
223664
233664
243664
253763
263763
273862
283862
293862
303961
314060

Chance of precipitation in January

Any precipitationSnow

Kudamatsu gets around 62 mm of rain and snow over 9.3 wet days in January, the driest month. 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 34% on the wettest days, and about 1 day brings snow. The odds climb toward the end of the month.

0%10%20%30%40%151015202531
Rain chance (%)Snow chance (%)
1282
2282
3282
4273
5273
6273
7273
8273
9273
10273
11283
12284
13294
14294
15304
16314
17314
18325
19335
20335
21345
22345
23345
24345
25345
26345
27345
28345
29345
30345
31335

Humidity in January

DryComfortableHumidMuggyOppressiveMiserable

Most of January feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, January 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 (%)
1100
2100
3100
4100
5100
6100
7100
8100
9100
10100
11100
12100
13100
14100
15100
16100
17100
18100
19100
20100
21100
22100
23100
24100
25100
26100
27100
28100
29100
30100
31100

Wind in January

Winds average 17 km/h in January, the windiest month of the year.

Across January, daily wind ranges from about 17 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
117light breeze
217light breeze
317light breeze
417light breeze
517light breeze
617light breeze
717light breeze
817light breeze
917light breeze
1017light breeze
1117light 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 January

DaylightNight

Daylight runs from about 9 h 48 min at the start of January to 10 h 18 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 30 minutes over January. Sunrise moves from 7:23 AM to 7:17 AM, and sunset from 5:09 PM to 5:35 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
19.87:235:09
29.87:235:09
39.87:235:10
49.87:235:11
59.87:235:12
69.87:235:12
79.87:235:13
89.87:235:14
99.97:235:15
109.97:235:16
119.97:235:16
129.97:235:17
139.97:235:18
149.97:235:19
159.97:235:20
1610.07:235:21
1710.07:235:22
1810.07:225:23
1910.07:225:24
2010.07:225:24
2110.17:225:25
2210.17:215:26
2310.17:215:27
2410.17:205:28
2510.27:205:29
2610.27:205:30
2710.27:195:31
2810.27:195:32
2910.27:185:33
3010.37:175:34
3110.37:175:35

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 2.53 kWh/m².

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 — January's 2.53 kWh/m² sits near the bottom.

0123151015202531
Solar energy (kWh/m²)Level
12.4Moderate
22.4Moderate
32.4Moderate
42.4Moderate
52.4Moderate
62.4Moderate
72.4Moderate
82.4Moderate
92.4Moderate
102.4Moderate
112.4Moderate
122.4Moderate
132.4Moderate
142.4Moderate
152.5Moderate
162.5Moderate
172.5Moderate
182.5Moderate
192.5Moderate
202.5Moderate
212.6Moderate
222.6Moderate
232.6Moderate
242.6Moderate
252.7Moderate
262.7Moderate
272.7Moderate
282.8Moderate
292.8Moderate
302.8Moderate
312.9Moderate
Planning a trip in January

Hazard calendar for Kudamatsu

In seasonPeak

In January, 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 January a good time to visit Kudamatsu?

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

1.7
Sightseeing
12th-best month of the year
0.0
Beach & pool
11th-best month of the year

January is a weaker month for outdoor sightseeing in Kudamatsu.

What to pack for Kudamatsu in January

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

In January, Kudamatsu sees daytime highs around 9°C and nights near 4°C. Pack a warm layer. Worth having: rain gear. About 9 days see rain.

a warm layerrain gear

Sea temperature near Kudamatsu in January

The nearest coast averages about 14°C in January — 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 January

LowModerateHighVery highExtreme

Clear-sky midday UV in January 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 January

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where January 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
January 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).