Kokubu-matsuki weather in April

In April, Kokubu-matsuki sees average daytime highs of 20°C and overnight lows near 11°C, with 181 mm of rain across 11.8 wet days and about 12.8 hours of daylight. It is the 7th-warmest and 5th-wettest month of the year here.

Highs climb over the month, from about 18°C in the first days to 22°C by the end. The sky is clear or mostly clear about 29% 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 12 min by month's end. Set against the rest of the year, April is Kokubu-matsuki's 7th-clearest and 5th-windiest month. For the whole year in context, see Kokubu-matsuki's year-round climate.

Daytime high
20°
7th warmest
Overnight low
11°
6th coldest
Rainfall
181 mm
11.8 wet days
Daylight
12 h 48 min
5:54 AM – 6:40 PM
Cloud cover
64%
7th clearest
Wind
8 km/h
5th windiest
Solar energy
4.87 kWh/m²
Travel score
5.9
out of 10

Kokubu-matsuki is human settlement in Japan.

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 18°C in the first days to 22°C by the end.

A typical April day in Kokubu-matsuki reaches about 20°C in the afternoon and slips back to 11°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 16°C and 24°C. Set against its neighbours, April runs about 4°C warmer than March and about 4°C cooler than May.

10°20°30°151015202530
Avg high (°C)Avg low (°C)
1189
2189
3189
4189
5189
6199
7199
81910
91910
101910
111910
122010
132010
142010
152011
162011
172011
182011
192011
202111
212111
222112
232112
242112
252112
262112
272212
282213
292213
302213

How April really feels in Kokubu-matsuki

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.

Kokubu-matsuki weather by month

How April compares with the rest of the year at a glance. April is the 7th-warmest and 5th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan11° / 808.310.22.8
Feb12° / 102910.83.3
Mar16° / 15712.911.84.6
Apr20° / 11°18111.812.85.9
May24° / 15°20511.713.66.4
Jun26° / 20°48819.9144.8
Jul30° / 24°29919.413.93.9
Aug31° / 24°17418.313.23.8
Sep28° / 21°2021512.25.2
Oct24° / 15°114911.27.1
Nov18° / 1078.210.46.2
Dec13° / 817.1104.0

Cloud cover in April

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 29% of the time in April.

Beyond those clear spells, partly cloudy skies cover about 11% of April, with mostly cloudy or overcast conditions the remaining 60%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14456
24456
34357
44357
54258
64258
74159
84060
93961
103961
113961
123961
133961
143862
153763
163763
173763
183862
193961
203961
213961
223961
233961
243961
254060
264060
273961
283961
293961
303961

Chance of precipitation in April

Any precipitation

Kokubu-matsuki gets around 181 mm of rain over 11.8 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 40% and peaks near 42% on the wettest days.

0%10%20%30%40%50%151015202530
Rain chance (%)
140
239
339
438
538
638
738
838
938
1039
1139
1240
1341
1441
1542
1642
1742
1842
1942
2042
2142
2241
2341
2441
2540
2639
2739
2838
2938
3037

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 69% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
1821341
2821341
3801451
4801451
5781561
6781561
7781561
8761671
9761671
10761671
11741781
12741781
13731881
14711991
15711991
16692092
17692092
18682192
19682192
20672292
21662392
226324103
236225103
246125113
255826124
265727124
275627134
285328145
295328145
305029156

Wind in April

Winds average 8 km/h in April.

Across April, daily wind ranges from about 8 km/h on the calmest days to 8 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
18calm
28calm
38calm
48calm
58calm
68calm
78calm
88calm
98calm
108calm
118calm
128calm
138calm
148calm
158calm
168calm
178calm
188calm
198calm
208calm
218calm
228calm
238calm
248calm
258calm
268calm
278calm
288calm
298calm
308calm

Sunrise & sunset in April

DaylightNight

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

Days grow by about 54 minutes over April. Sunrise moves from 6:13 AM to 5:38 AM, and sunset from 6:30 PM to 6:50 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.36:136:30
212.36:126:31
312.46:106:32
412.46:096:32
512.46:086:33
612.56:066:34
712.56:056:34
812.56:046:35
912.66:036:36
1012.66:016:36
1112.66:006:37
1212.65:596:38
1312.75:586:38
1412.75:566:39
1512.75:556:40
1612.85:546:40
1712.85:536:41
1812.85:516:42
1912.95:506:43
2012.95:496:43
2112.95:486:44
2213.05:476:45
2313.05:466:45
2413.05:456:46
2513.15:446:47
2613.15:426:47
2713.15:416:48
2813.15:406:49
2913.25:396:50
3013.25:386:50

Solar energy in April

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in April, about 4.87 kWh/m².

For context, solar energy here swings from a low near 2.57 kWh/m² to a high of 5 kWh/m² in May across the year — April's 4.87 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
14.5Bright
24.6Bright
34.6Bright
44.6Bright
54.7Bright
64.7Bright
74.7Bright
84.7Bright
94.7Bright
104.7Bright
114.8Bright
124.8Bright
134.8Bright
144.8Bright
154.8Bright
164.8Bright
174.8Bright
184.9Bright
194.9Bright
204.9Bright
214.9Bright
224.9Bright
235.0Bright
245.0Bright
255.0Bright
265.0Bright
275.0Bright
285.0Bright
295.0Bright
305.0Bright
Planning a trip in April

Hazard calendar for Kokubu-matsuki

In seasonPeak

In April, Kokubu-matsuki sits inside its pacific typhoon season. The full year is below, with each hazard's peak months called out.

Kokubu-matsuki sits in the Pacific typhoon belt; the season peaks July–October.

Kokubu-matsuki's rainy season runs June–July, 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 April a good time to visit Kokubu-matsuki?

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

5.9
Sightseeing
4th-best month of the year
3.1
Beach & pool
7th-best month of the year

April is a reasonable time to visit Kokubu-matsuki for sightseeing.

What to pack for Kokubu-matsuki in April

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

In April, Kokubu-matsuki sees daytime highs around 20°C and nights near 11°C. Worth packing: rain gear and sun protection. About 12 days see rain.

rain gearsun protection

Sea temperature near Kokubu-matsuki in April

The nearest coast averages about 20°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 42 km away) is warmest in August at about 28°C and coldest in February near 18°C.

It's comfortable for a long swim from Apr 24 to Dec 26 — about 8.1 months when the water holds above 20°C.

15°20°25°30°JanFebMarAprMayJunJulAugSepOctNovDeccoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan19Cool
Feb18Cool
Mar18Cool
Apr20Cool
May21Refreshing
Jun24Refreshing
Jul27Warm
Aug28Tropical
Sep27Warm
Oct25Warm
Nov23Refreshing
Dec21Refreshing

UV index in Kokubu-matsuki in April

LowModerateHighVery highExtreme

Clear-sky midday UV in April peaks around 8 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Kokubu-matsuki peaks around June 23 at about 11 (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 — every month of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highExtremeVery highHighModerateJun 23UV 11Dec 23UV 3
UV index (midday)Level
Jan3Moderate
Feb5Moderate
Mar7High
Apr8Very high
May8Very high
Jun11Extreme
Jul11Extreme
Aug9Very high
Sep10Very high
Oct6High
Nov5Moderate
Dec3Moderate

Air quality in Kokubu-matsuki 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 Kokubu-matsuki is worst in April — around 23 µg/m³ PM2.5 (moderate), about 1.9× the cleanest month (October, 12 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateApr 1423 µg/m³Oct 1012 µg/m³
PM2.5 (µg/m³)Level
Jan15Moderate
Feb19Moderate
Mar22Moderate
Apr23Moderate
May21Moderate
Jun17Moderate
Jul12Moderate
Aug14Moderate
Sep12Moderate
Oct12Moderate
Nov14Moderate
Dec13Moderate
Location & terrain

Where is Kokubu-matsuki?

Kokubu-matsuki sits at 31.7°N, 130.8°E, 0 m above sea level, in Japan. The nearest listed city is Kirishima, 1.0 km away.

Topography around Kokubu-matsuki

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

Within 3 km, the terrain around Kokubu-matsuki has only modest variations in elevation — a maximum elevation change of 220 m around an average of 26 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 603 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,680 m.

The land around Kokubu-matsuki is covered by artificial surfaces (48%), trees (24%) and cropland (21%) within 3 km, trees (60%) and water (26%) within 16 km, and trees (55%) and water (36%) within 80 km.

3 km
220 m
16 km
603 m
80 km
1,680 m
treesgrasslandcroplandartificial surfacesbare terrainwater
April weather nearby: Kirishima 1.0 km · Hamanoichi 4.0 km · Kajiki 9.0 km · Aira 17 km · Soo 23 km · Sueyoshichō-ninokata 25 km · Kagoshima 28 km · Miyakonojō 28 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 Kokubu-matsuki (31.7333°, 130.7667°, elevation 0 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).