Sumiyoshi weather in April

In April, Sumiyoshi sees average daytime highs of 17°C and overnight lows near 12°C, with 193 mm of rain across 12 wet days and about 12.8 hours of daylight. It is the 8th-warmest and 6th-wettest month of the year here.

Highs climb over the month, from about 15°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 Sumiyoshi's 8th-clearest and 6th-windiest month. For the whole year in context, see Sumiyoshi's year-round climate.

Daytime high
17°
8th warmest
Overnight low
12°
5th coldest
Rainfall
193 mm
12 wet days
Daylight
12 h 54 min
5:21 AM – 6:13 PM
Cloud cover
58%
8th clearest
Wind
17 km/h
6th windiest
Solar energy
5.2 kWh/m²
Travel score
5.1
out of 10

Temperature in April

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 15°C in the first days to 18°C by the end.

A typical April day in Sumiyoshi reaches about 17°C in the afternoon and slips back to 12°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between 14°C and 20°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)
11510
21510
31510
41510
51510
61611
71611
81611
91611
101611
111611
121611
131712
141712
151712
161712
171712
181712
191713
201713
211713
221813
231813
241813
251813
261814
271814
281814
291914
301914

How April really feels in Sumiyoshi

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.

Sumiyoshi weather by month

How April compares with the rest of the year at a glance. April is the 8th-warmest and 6th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan10° / 897.39.92.5
Feb11° / 1098.410.72.6
Mar13° / 18412.811.73.5
Apr17° / 12°1931212.85.1
May20° / 16°22312.513.85.9
Jun23° / 20°29115.914.35.5
Jul27° / 24°2871614.15.5
Aug28° / 25°17115.813.35.5
Sep26° / 23°26516.712.25.7
Oct22° / 18°2511411.16.1
Nov17° / 13°14811.110.25.4
Dec12° / 868.29.73.7

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 (%)
15248
25248
35248
45248
55149
65149
75149
85149
95149
105050
114951
124951
134852
144852
154852
164852
174852
184753
194654
204654
214753
224654
234654
244654
254654
264654
274753
284654
294654
304654

Chance of precipitation in April

Any precipitation

Sumiyoshi gets around 193 mm of rain over 12 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
540
640
740
841
941
1041
1141
1241
1341
1442
1542
1642
1742
1842
1942
2041
2141
2241
2340
2440
2539
2639
2738
2838
2938
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 80% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
194510
293610
392710
492710
591810
690910
790910
8891010
9891010
10891010
11881110
12881110
13861220
14841321
15841321
16821431
17811531
18811531
19791641
20771841
21761941
22742051
23722251
24692461
25672571
26652771
27632881
28612991
295831101
305632111

Wind in April

Winds average 17 km/h in April.

Across April, daily wind ranges from about 16 km/h on the calmest days to 18 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202530
Wind speed (km/h)Feels
118light breeze
218light breeze
318light breeze
418light breeze
518light breeze
618light breeze
718light 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
2216light breeze
2316light breeze
2416light breeze
2516light breeze
2616light breeze
2716light breeze
2816light breeze
2916light breeze
3016light 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 5:42 AM to 5:04 AM, and sunset from 6:01 PM to 6:25 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.35:426:01
212.45:406:02
312.45:396:03
412.45:386:04
512.55:366:05
612.55:356:05
712.55:336:06
812.65:326:07
912.65:316:08
1012.75:296:09
1112.75:286:09
1212.75:266:10
1312.85:256:11
1412.85:246:12
1512.85:226:13
1612.95:216:13
1712.95:206:14
1812.95:186:15
1913.05:176:16
2013.05:166:17
2113.05:156:17
2213.15:136:18
2313.15:126:19
2413.15:116:20
2513.25:106:21
2613.25:096:21
2713.25:076:22
2813.35:066:23
2913.35:056:24
3013.35:046:25

Solar energy in April

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in April, about 5.2 kWh/m².

For context, solar energy here swings from a low near 2.62 kWh/m² to a high of 5.55 kWh/m² in May across the year — April's 5.2 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
14.9Bright
24.9Bright
35.0Bright
45.0Bright
55.0Bright
65.0Bright
75.0Bright
85.1Bright
95.1Bright
105.1Bright
115.1Bright
125.1Bright
135.1Bright
145.2Bright
155.2Bright
165.2Bright
175.2Bright
185.2Bright
195.2Bright
205.2Bright
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 Sumiyoshi

In seasonPeak

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

Sumiyoshi 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 Sumiyoshi?

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

5.1
Sightseeing
8th-best month of the year
1.1
Beach & pool
8th-best month of the year

April is a reasonable time to visit Sumiyoshi for sightseeing.

What to pack for Sumiyoshi in April

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

In April, Sumiyoshi sees daytime highs around 17°C and nights near 12°C. Worth packing: a warm layer, rain gear and sun protection. About 12 days see rain.

a warm layerrain gearsun protection

Sea temperature near Sumiyoshi in April

The nearest coast averages about 17°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 18 km away) is warmest in August at about 27°C and coldest in February near 15°C.

It's comfortable for a long swim from May 28 to Nov 26 — about 6 months when the water holds above 20°C.

15°20°25°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan16Cool
Feb15Cool
Mar16Cool
Apr17Cool
May19Cool
Jun22Refreshing
Jul24Warm
Aug27Warm
Sep26Warm
Oct23Refreshing
Nov21Refreshing
Dec18Cool

UV index in Sumiyoshi in April

LowModerateHighVery highExtreme

Clear-sky midday UV in April peaks around 7 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Sumiyoshi peaks around July 22 at about 10 (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 — in 10 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highExtremeVery highModerateJul 22UV 10Dec 23UV 3
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar5Moderate
Apr7High
May9Very high
Jun10Very high
Jul10Extreme
Aug10Very high
Sep9Very high
Oct6High
Nov4Moderate
Dec3Moderate

Air quality in Sumiyoshi 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 Sumiyoshi is worst in April — around 21 µg/m³ PM2.5 (moderate), about 2.3× the cleanest month (December, 9 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodApr 1721 µg/m³Dec 159 µg/m³
PM2.5 (µg/m³)Level
Jan11Good
Feb14Moderate
Mar19Moderate
Apr21Moderate
May19Moderate
Jun16Moderate
Jul12Good
Aug11Good
Sep10Good
Oct11Good
Nov10Good
Dec9Good
Location & terrain

Where is Sumiyoshi?

Sumiyoshi sits at 34.8°N, 138.3°E, 8 m above sea level, in Japan. The nearest listed city is Sagara, 8.0 km away.

Topography around Sumiyoshi

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

Within 3 km, the terrain around Sumiyoshi has only modest variations in elevation — a maximum elevation change of 87 m around an average of 8 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 363 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,738 m.

The land around Sumiyoshi is covered by water (38%) and artificial surfaces (35%) within 3 km, water (46%) and trees (28%) within 16 km, and trees (46%) and water (45%) within 80 km.

3 km
87 m
16 km
363 m
80 km
3,738 m
treesgrasslandcroplandartificial surfacesbare terrainwater
April weather nearby: Sagara 8.0 km · Shimada 10 km · Maruobara 10 km · Kikugawa 13 km · Fujieda 13 km · Kanaya 14 km · Yaizu 15 km · Ōyama 17 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 Sumiyoshi (34.75°, 138.25°, elevation 8 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).