Shimonoseki weather in January

In January, Shimonoseki sees average daytime highs of 9°C and overnight lows near 6°C, with 92 mm of precipitation across 13.9 wet days and about 10 hours of daylight. It is the 12th-warmest and 10th-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 12% 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 Shimonoseki's 11th-clearest and 1st-windiest month. For the whole year in context, see Shimonoseki's year-round climate.

Daytime high
12th warmest
Overnight low
1st coldest
Precipitation
92 mm
13.9 wet days
Daylight
10 hours
7:26 AM – 5:25 PM
Cloud cover
70%
11th clearest
Wind
20 km/h
1st windiest
Solar energy
2.31 kWh/m²
Travel score
1.6
out of 10

Shimonoseki is city in Yamaguchi Prefecture, Japan.

Density
371/km²
people per km²
Founded
1889

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 Shimonoseki reaches about 9°C in the afternoon and slips back to 6°C overnight — a 3°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)
1107
2107
3107
4107
5107
697
797
897
996
1096
1196
1296
1396
1496
1596
1696
1796
1896
1996
2096
2196
2296
2396
2496
2586
2686
2786
2886
2986
3086
3196

How January really feels in Shimonoseki

Once humidity and wind are folded in, January 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

January sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Shimonoseki weather by month

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

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / 9213.91.5101.6
Feb / 91121.210.71.8
Mar12° / 14412.40.211.73.0
Apr16° / 12°15311012.84.8
May20° / 17°17010.4013.76.2
Jun23° / 20°27313.8014.25.9
Jul27° / 24°25513.50145.8
Aug28° / 26°13911.4013.35.7
Sep26° / 23°16311.5012.26.5
Oct21° / 18°1048.4011.16.9
Nov16° / 13°9510.2010.25.2
Dec11° / 9012.80.59.82.7

Cloud cover in January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 12% of the time in January.

Beyond those clear spells, partly cloudy skies cover about 20% of January, with mostly cloudy or overcast conditions the remaining 68%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13862
23664
33763
43763
53664
63565
73565
83565
93466
103367
113268
123268
133169
143070
153070
163070
172971
182971
192971
202971
212971
222971
233070
243070
253070
263070
273169
283268
293367
303367
313367

Chance of precipitation in January

Any precipitationSnow

Shimonoseki gets around 92 mm of rain and snow over 13.9 wet days in January. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 45% and peaks near 48% on the wettest days, and about 2 days bring snow.

0%20%40%60%151015202531
Rain chance (%)Snow chance (%)
1403
2403
3403
4413
5413
6423
7423
8433
9443
10444
11454
12454
13464
14464
15474
16475
17475
18486
19486
20486
21486
22476
23477
24477
25477
26467
27467
28468
29468
30458
31458

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 20 km/h in January, the windiest month of the year.

Across January, daily wind ranges from about 20 km/h on the calmest days to 20 km/h at its breeziest. It stays fairly steady from day to day.

0510152025151015202531
Wind speed (km/h)Feels
120breezy
220breezy
320breezy
420breezy
520breezy
620breezy
720light breeze
820light breeze
920light breeze
1020light breeze
1120light breeze
1220light breeze
1320light breeze
1420light breeze
1520light breeze
1620light breeze
1720light breeze
1820light breeze
1920light breeze
2020light breeze
2120light breeze
2220light breeze
2320light breeze
2420light breeze
2520light breeze
2620light breeze
2720light breeze
2820light breeze
2920light breeze
3020light breeze
3120light 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 7:26 AM to 7:20 AM, and sunset from 5:13 PM to 5:39 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
19.87:265:13
29.87:265:13
39.87:275:14
49.87:275:15
59.87:275:16
69.87:275:16
79.87:275:17
89.87:275:18
99.97:275:19
109.97:275:19
119.97:275:20
129.97:275:21
139.97:275:22
149.97:275:23
1510.07:275:24
1610.07:265:25
1710.07:265:26
1810.07:265:26
1910.07:265:27
2010.07:255:28
2110.17:255:29
2210.17:255:30
2310.17:245:31
2410.17:245:32
2510.27:245:33
2610.27:235:34
2710.27:235:35
2810.27:225:36
2910.37:225:37
3010.37:215:38
3110.37:205:39

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 2.31 kWh/m².

For context, solar energy here swings from a low near 2.12 kWh/m² to a high of 5.54 kWh/m² in May across the year — January's 2.31 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
82.2Moderate
92.2Moderate
102.2Moderate
112.2Moderate
122.2Moderate
132.2Moderate
142.2Moderate
152.2Moderate
162.3Moderate
172.3Moderate
182.3Moderate
192.3Moderate
202.3Moderate
212.4Moderate
222.4Moderate
232.4Moderate
242.4Moderate
252.5Moderate
262.5Moderate
272.5Moderate
282.5Moderate
292.6Moderate
302.6Moderate
312.6Moderate
Planning a trip in January

Hazard calendar for Shimonoseki

In seasonPeak

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

Shimonoseki 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 January a good time to visit Shimonoseki?

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

1.6
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 Shimonoseki.

What to pack for Shimonoseki in January

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

In January, Shimonoseki sees daytime highs around 9°C and nights near 6°C. Pack a warm layer. Worth having: rain gear. About 14 days see rain.

a warm layerrain gear

Sea temperature near Shimonoseki in January

The nearest coast averages about 13°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 20 km away) is warmest in August at about 27°C and coldest in February near 12°C.

It's comfortable for a long swim from Jun 6 to Nov 10 — about 5.2 months when the water holds above 20°C.

10°15°20°25°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan13Bracing
Feb12Bracing
Mar12Bracing
Apr14Bracing
May17Cool
Jun21Refreshing
Jul25Warm
Aug27Warm
Sep26Warm
Oct23Refreshing
Nov19Cool
Dec16Cool

UV index in Shimonoseki 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 Shimonoseki peaks around July 17 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 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 highModerateJul 17UV 9Dec 22UV 3
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar5High
Apr8Very high
May8Very high
Jun9Very high
Jul9Very high
Aug9Very high
Sep9Very high
Oct6High
Nov4Moderate
Dec3Moderate

Air quality in Shimonoseki 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 Shimonoseki is worst in March — around 27 µg/m³ PM2.5 (moderate), about 2.2× the cleanest month (October, 12 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateMar 2026 µg/m³Oct 1212 µg/m³
PM2.5 (µg/m³)Level
Jan17Moderate
Feb20Moderate
Mar27Moderate
Apr24Moderate
May21Moderate
Jun18Moderate
Jul16Moderate
Aug19Moderate
Sep13Moderate
Oct12Good
Nov14Moderate
Dec13Moderate
Location & terrain

Where is Shimonoseki?

Shimonoseki sits at 34.0°N, 130.9°E, 10 m above sea level, in Japan. The nearest listed city is Kitakyushu, 14 km away.

Topography around Shimonoseki

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

Within 3 km, the terrain around Shimonoseki has significant variations in elevation — a maximum elevation change of 291 m around an average of 26 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 658 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,205 m.

The land around Shimonoseki is covered by artificial surfaces (42%), water (34%) and trees (22%) within 3 km, water (53%), trees (22%) and artificial surfaces (20%) within 16 km, and water (50%) and trees (38%) within 80 km.

3 km
291 m
16 km
658 m
80 km
1,205 m
treesgrasslandcroplandartificial surfacesbare terrainwater
January weather nearby: Kitakyushu 14 km · Kanda 20 km · Sanyōonoda 22 km · Onoda 23 km · Miyaodai 24 km · Yukuhashi 26 km · Nakama 26 km · Miyako 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 Shimonoseki (33.9555°, 130.9371°, elevation 10 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).