Shimonoseki weather in April

In April, Shimonoseki sees average daytime highs of 16°C and overnight lows near 12°C, with 153 mm of rain across 11 wet days and about 12.8 hours of daylight. It is the 8th-warmest and 5th-wettest month of the year here.

Highs climb over the month, from about 14°C in the first days to 18°C by the end. The sky is clear or mostly clear about 36% of the time in April, and the air most often feels dry.

Daylight stretches from about 12 h 18 min at the start of April to 13 h 18 min by month's end. Set against the rest of the year, April is Shimonoseki's 4th-clearest and 7th-windiest month. For the whole year in context, see Shimonoseki's year-round climate.

Daytime high
16°
8th warmest
Overnight low
12°
5th coldest
Rainfall
153 mm
11 wet days
Daylight
12 h 48 min
5:51 AM – 6:42 PM
Cloud cover
57%
4th clearest
Wind
15 km/h
7th windiest
Solar energy
5.17 kWh/m²
Travel score
4.8
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 April

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 14°C in the first days to 18°C by the end.

A typical April day in Shimonoseki reaches about 16°C in the afternoon and slips back to 12°C overnight — a 3°C spread between the day's warmth and the night's chill. On most days the high lands between 13°C and 18°C. Set against its neighbours, April runs about 4°C warmer than March and about 4°C cooler than May.

10°15°20°25°151015202530
Avg high (°C)Avg low (°C)
11410
21410
31411
41411
51411
61411
71511
81511
91511
101512
111512
121512
131512
141612
151612
161612
171613
181613
191613
201613
211713
221713
231713
241714
251714
261714
271714
281814
291814
301814

How April really feels in Shimonoseki

Once humidity and wind are folded in, April 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

April 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 April compares with the rest of the year at a glance. April is the 8th-warmest and 5th-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 April

ClearMostly clearPartly cloudyMostly cloudyOvercast

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

Beyond those clear spells, partly cloudy skies cover about 12% of April, with mostly cloudy or overcast conditions the remaining 52%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15050
24951
34951
44852
54852
64852
74852
84852
94753
104753
114753
124852
134753
144753
154753
164753
174852
184852
194951
204951
215050
225050
235050
244951
254951
264951
274951
285050
295050
304852

Chance of precipitation in April

Any precipitation

Shimonoseki gets around 153 mm of rain over 11 wet days in April. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 37% and peaks near 38% on the wettest days.

0%10%20%30%40%50%151015202530
Rain chance (%)
138
238
337
437
537
637
737
837
937
1037
1137
1237
1337
1437
1538
1638
1738
1837
1937
2037
2136
2236
2336
2436
2536
2635
2735
2834
2934
3033

Humidity in April

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, April lands in the dry band about 79% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)
19550
29460
39370
49370
59280
69280
79190
889101
989101
1088111
1187121
1286131
1385141
1484151
1582162
1681172
1780182
1879192
1978202
2075223
2174233
2272253
2369274
2468284
2565305
2662326
2760337
2857358
2955369
3054379

Wind in April

Winds average 15 km/h in April.

Across April, daily wind ranges from about 15 km/h on the calmest days to 16 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202530
Wind speed (km/h)Feels
116light breeze
216light breeze
316light breeze
416light breeze
516light breeze
616light breeze
716light breeze
816light breeze
916light breeze
1016light breeze
1116light breeze
1216light breeze
1316light breeze
1416light breeze
1516light breeze
1615light breeze
1715light breeze
1815light breeze
1915light breeze
2015light breeze
2115light breeze
2215light breeze
2315light breeze
2415light breeze
2515light breeze
2615light breeze
2715light breeze
2815light breeze
2915light breeze
3015light breeze

Sunrise & sunset in April

DaylightNight

Daylight runs from about 12 h 18 min at the start of April to 13 h 18 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 60 minutes over April. Sunrise moves from 6:11 AM to 5:34 AM, and sunset from 6:30 PM to 6:53 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.36:116:30
212.46:106:31
312.46:096:32
412.46:076:33
512.56:066:33
612.56:046:34
712.56:036:35
812.66:026:36
912.66:006:36
1012.65:596:37
1112.75:586:38
1212.75:566:39
1312.75:556:40
1412.85:546:40
1512.85:526:41
1612.85:516:42
1712.95:506:43
1812.95:496:43
1912.95:476:44
2013.05:466:45
2113.05:456:46
2213.05:446:47
2313.15:426:47
2413.15:416:48
2513.15:406:49
2613.25:396:50
2713.25:386:50
2813.25:376:51
2913.35:356:52
3013.35:346:53

Solar energy in April

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in April, about 5.17 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 — April's 5.17 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
14.8Bright
24.8Bright
34.8Bright
44.9Bright
54.9Bright
64.9Bright
75.0Bright
85.0Bright
95.0Bright
105.0Bright
115.1Bright
125.1Bright
135.1Bright
145.1Bright
155.2Bright
165.2Bright
175.2Bright
185.2Bright
195.2Bright
205.3Bright
215.3Bright
225.3Bright
235.3Bright
245.3Bright
255.3Bright
265.4Bright
275.4Bright
285.4Bright
295.4Bright
305.4Bright
Planning a trip in April

Hazard calendar for Shimonoseki

In seasonPeak

In April, 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 April a good time to visit Shimonoseki?

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

4.8
Sightseeing
8th-best month of the year
0.7
Beach & pool
8th-best month of the year

April is a reasonable time to visit Shimonoseki for sightseeing.

What to pack for Shimonoseki in April

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

In April, Shimonoseki sees daytime highs around 16°C and nights near 12°C. Worth packing: a warm layer, rain gear and sun protection. About 11 days see rain.

a warm layerrain gearsun protection

Sea temperature near Shimonoseki in April

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

LowModerateHighVery highExtreme

Clear-sky midday UV in April peaks around 8 — enough to warrant sun protection. 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 April

GoodModeratePoorUnhealthyVery unhealthy

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