Kaseda-shirakame weather in April

In April, Kaseda-shirakame sees average daytime highs of 19°C and overnight lows near 14°C, with 189 mm of rain across 12.1 wet days and about 12.7 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 21°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 Kaseda-shirakame's 6th-clearest and 5th-windiest month. For the whole year in context, see Kaseda-shirakame's year-round climate.

Daytime high
19°
7th warmest
Overnight low
14°
5th coldest
Rainfall
189 mm
12.1 wet days
Daylight
12 h 48 min
5:56 AM – 6:42 PM
Cloud cover
63%
6th clearest
Wind
15 km/h
5th windiest
Solar energy
4.94 kWh/m²
Travel score
5.8
out of 10

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 21°C by the end.

A typical April day in Kaseda-shirakame reaches about 19°C in the afternoon and slips back to 14°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between 16°C and 22°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)
11813
21813
31813
41813
51813
61813
71813
81813
91914
101914
111914
121914
131914
141914
151914
161914
172015
182015
192015
202015
212015
222015
232015
242015
252116
262116
272116
282116
292116
302116

How April really feels in Kaseda-shirakame

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.

Kaseda-shirakame 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
Jan12° / 10412.510.23.0
Feb13° / 11711.510.93.4
Mar16° / 11°17013.611.84.5
Apr19° / 14°18912.112.75.8
May23° / 18°20711.713.66.4
Jun26° / 22°49919.3145.0
Jul29° / 25°30717.513.84.5
Aug30° / 26°16415.313.14.3
Sep28° / 24°20613.412.25.5
Oct24° / 19°113911.27.2
Nov19° / 15°1279.510.46.2
Dec14° / 10°10210.5104.2

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 (%)
14159
24159
34060
44060
54060
63961
73961
84060
94060
104060
114060
124060
134060
144060
154060
164060
173961
184060
194060
204060
214060
224060
234060
244060
254060
264060
274060
284060
294060
303961

Chance of precipitation in April

Any precipitation

Kaseda-shirakame gets around 189 mm of rain over 12.1 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 (%)
141
240
340
440
539
639
739
839
939
1039
1140
1240
1341
1441
1542
1642
1742
1842
1942
2042
2142
2242
2342
2441
2541
2641
2740
2839
2939
3038

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 55% of days. Sticky, muggy-or-worse air turns up on roughly 6% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
17517620
27218730
37218730
47019830
56820930
66820930
765211040
865211040
963221140
1062221240
1160231340
1260231340
1358241440
1457241540
1556251540
1655251640
1754261640
1853261650
1951271750
2051271750
2149281760
2247281860
2346291870
2444291980
2542292080
2641292090
27393021101
28372922111
29363022111
30343023121

Wind in April

Winds average 15 km/h in April.

Across April, daily wind ranges from about 14 km/h on the calmest days to 15 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202530
Wind speed (km/h)Feels
115light breeze
215light breeze
315light breeze
415light breeze
515light breeze
615light breeze
715light breeze
815light breeze
915light breeze
1015light breeze
1115light breeze
1215light breeze
1315light breeze
1415light breeze
1515light breeze
1615light breeze
1715light breeze
1815light breeze
1914light breeze
2014light breeze
2114light breeze
2214light breeze
2314light breeze
2414light breeze
2514light breeze
2614light breeze
2714light breeze
2814light breeze
2914light breeze
3014light breeze

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 6:15 AM to 5:41 AM, and sunset from 6:32 PM to 6:52 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.36:156:32
212.36:136:33
312.46:126:33
412.46:116:34
512.46:106:35
612.46:086:35
712.56:076:36
812.56:066:37
912.56:056:37
1012.66:036:38
1112.66:026:39
1212.66:016:39
1312.76:006:40
1412.75:586:41
1512.75:576:41
1612.85:566:42
1712.85:556:43
1812.85:546:43
1912.95:526:44
2012.95:516:45
2112.95:506:45
2213.05:496:46
2313.05:486:47
2413.05:476:47
2513.05:466:48
2613.15:456:49
2713.15:446:50
2813.15:436:50
2913.25:426:51
3013.25:416:52

Solar energy in April

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in April, about 4.94 kWh/m².

For context, solar energy here swings from a low near 2.34 kWh/m² to a high of 5.14 kWh/m² in May across the year — April's 4.94 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
14.6Bright
24.6Bright
34.6Bright
44.7Bright
54.7Bright
64.7Bright
74.7Bright
84.8Bright
94.8Bright
104.8Bright
114.8Bright
124.8Bright
134.9Bright
144.9Bright
154.9Bright
164.9Bright
175.0Bright
185.0Bright
195.0Bright
205.0Bright
215.0Bright
225.0Bright
235.1Bright
245.1Bright
255.1Bright
265.1Bright
275.1Bright
285.1Bright
295.1Bright
305.1Bright
Planning a trip in April

Hazard calendar for Kaseda-shirakame

In seasonPeak

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

Kaseda-shirakame sits in the Pacific typhoon belt; the season peaks July–October.

Kaseda-shirakame'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 Kaseda-shirakame?

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

5.8
Sightseeing
4th-best month of the year
2.7
Beach & pool
8th-best month of the year

April is a reasonable time to visit Kaseda-shirakame for sightseeing.

What to pack for Kaseda-shirakame in April

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

In April, Kaseda-shirakame sees daytime highs around 19°C and nights near 14°C. Worth packing: rain gear and sun protection. About 12 days see rain.

rain gearsun protection

Sea temperature near Kaseda-shirakame in April

The nearest coast averages about 19°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 19 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 26 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
Mar19Cool
Apr19Cool
May21Refreshing
Jun24Refreshing
Jul27Warm
Aug28Tropical
Sep27Warm
Oct25Warm
Nov23Refreshing
Dec21Refreshing

UV index in Kaseda-shirakame 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 Kaseda-shirakame peaks around July 10 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 highHighModerateJul 10UV 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 Kaseda-shirakame 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 Kaseda-shirakame 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 Kaseda-shirakame?

Kaseda-shirakame sits at 31.4°N, 130.3°E, 22 m above sea level, in Japan. The nearest listed city is Minamisatsuma, 4.0 km away.

Topography around Kaseda-shirakame

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

Within 3 km, the terrain around Kaseda-shirakame has only modest variations in elevation — a maximum elevation change of 194 m around an average of 35 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 611 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,644 m.

The land around Kaseda-shirakame is covered by trees (59%) and artificial surfaces (21%) within 3 km, trees (62%) and water (26%) within 16 km, and water (66%) and trees (29%) within 80 km.

3 km
194 m
16 km
611 m
80 km
1,644 m
treesgrasslandcroplandartificial surfaceswater
April weather nearby: Minamisatsuma 4.0 km · Minamikyushu 15 km · Makurazaki 17 km · Ijūin 24 km · Kagoshima 28 km · Umeki 29 km · Kushikino 34 km · Ichikikushikino 35 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 Kaseda-shirakame (31.4167°, 130.3167°, elevation 22 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).