Shirahama weather in April

In April, Shirahama sees average daytime highs of 17°C and overnight lows near 13°C, with 158 mm of rain across 11.1 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 19°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 Shirahama's 5th-clearest and 6th-windiest month. For the whole year in context, see Shirahama's year-round climate.

Daytime high
17°
8th warmest
Overnight low
13°
5th coldest
Rainfall
158 mm
11.1 wet days
Daylight
12 h 48 min
5:34 AM – 6:24 PM
Cloud cover
56%
5th clearest
Wind
18 km/h
6th windiest
Solar energy
5.33 kWh/m²
Travel score
5.4
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 19°C by the end.

A typical April day in Shirahama reaches about 17°C in the afternoon and slips back to 13°C overnight — a 4°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)
11511
21511
31511
41611
51611
61612
71612
81612
91612
101612
111712
121712
131713
141713
151713
161713
171713
181713
191814
201814
211814
221814
231814
241814
251814
261815
271915
281915
291915
301915

How April really feels in Shirahama

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.

Shirahama 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 daysSnow daysDaylight (hours)Travel score
Jan10° / 9511.60.5102.3
Feb11° / 10411.10.510.72.4
Mar13° / 15112.3011.73.7
Apr17° / 13°15811.1012.85.4
May21° / 17°17711013.76.2
Jun24° / 21°29315.4014.25.6
Jul27° / 24°24614.40145.7
Aug28° / 25°14613.3013.35.6
Sep26° / 23°21513.3012.26.1
Oct22° / 18°21711.2011.26.6
Nov17° / 14°1278.8010.35.8
Dec13° / 9710.10.19.83.6

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 14% of April, with mostly cloudy or overcast conditions the remaining 50%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15347
25347
35347
45347
55347
65347
75248
85347
95248
105248
115248
125149
135050
145050
154951
164951
174852
184852
194753
204753
214852
224852
234852
244852
254852
264852
274852
284753
294753
304753

Chance of precipitation in April

Any precipitation

Shirahama gets around 158 mm of rain over 11.1 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 38% and peaks near 41% on the wettest days.

0%10%20%30%40%50%151015202530
Rain chance (%)
137
236
336
436
536
636
736
837
937
1038
1138
1239
1340
1440
1540
1641
1741
1841
1940
2040
2139
2239
2338
2437
2537
2636
2736
2835
2935
3035

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 72% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
189920
288930
3871030
4861130
5851140
6841240
7831340
8831340
9821440
10801550
11781651
12771751
13761851
14751951
15742051
16722161
17712261
18702361
19692461
20672472
21662572
22642682
23622792
246028102
255928112
265729122
275629132
285330143
295130163
305030174

Wind in April

Winds average 18 km/h in April.

Across April, daily wind ranges from about 17 km/h on the calmest days to 20 km/h at its breeziest. It stays fairly steady from day to day.

0510152025151015202530
Wind speed (km/h)Feels
120light breeze
220light breeze
319light breeze
419light breeze
519light breeze
619light breeze
719light breeze
819light breeze
919light breeze
1019light breeze
1119light breeze
1219light breeze
1319light breeze
1418light breeze
1518light breeze
1618light breeze
1718light breeze
1818light breeze
1918light breeze
2018light breeze
2118light breeze
2218light breeze
2318light breeze
2418light breeze
2518light breeze
2618light breeze
2718light breeze
2818light breeze
2917light breeze
3017light 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 5:54 AM to 5:17 AM, and sunset from 6:13 PM to 6:35 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.35:546:13
212.35:526:13
312.45:516:14
412.45:506:15
512.55:486:16
612.55:476:16
712.55:466:17
812.65:446:18
912.65:436:19
1012.65:426:19
1112.75:406:20
1212.75:396:21
1312.75:386:22
1412.85:366:22
1512.85:356:23
1612.85:346:24
1712.95:326:25
1812.95:316:25
1912.95:306:26
2013.05:296:27
2113.05:276:28
2213.05:266:29
2313.15:256:29
2413.15:246:30
2513.15:236:31
2613.25:226:32
2713.25:206:32
2813.25:196:33
2913.35:186:34
3013.35:176:35

Solar energy in April

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in April, about 5.33 kWh/m².

For context, solar energy here swings from a low near 2.44 kWh/m² to a high of 5.6 kWh/m² in May across the year — April's 5.33 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.0Bright
25.0Bright
35.0Bright
45.1Bright
55.1Bright
65.1Bright
75.1Bright
85.2Bright
95.2Bright
105.2Bright
115.2Bright
125.2Bright
135.3Bright
145.3Bright
155.3Bright
165.3Bright
175.3Bright
185.3Bright
195.4Bright
205.4Bright
215.4Bright
225.4Bright
235.4Bright
245.5Bright
255.5Bright
265.5Bright
275.5Bright
285.5Bright
295.5Bright
305.5Bright
Planning a trip in April

Hazard calendar for Shirahama

In seasonPeak

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

Shirahama 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 Shirahama?

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

5.4
Sightseeing
8th-best month of the year
1.4
Beach & pool
8th-best month of the year

April is a reasonable time to visit Shirahama for sightseeing.

What to pack for Shirahama in April

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

In April, Shirahama sees daytime highs around 17°C and nights near 13°C. Worth packing: rain gear and sun protection. About 11 days see rain.

rain gearsun protection

Sea temperature near Shirahama 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 offshore is warmest in August at about 28°C and coldest in February near 17°C.

It's comfortable for a long swim from May 4 to Dec 22 — about 7.7 months when the water holds above 20°C.

15°20°25°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan18Cool
Feb17Cool
Mar18Cool
Apr19Cool
May21Refreshing
Jun23Refreshing
Jul26Warm
Aug28Warm
Sep27Warm
Oct25Warm
Nov23Refreshing
Dec20Refreshing

UV index in Shirahama 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 Shirahama peaks around July 11 at about 11 (extreme) — 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 11 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highExtremeVery highModerateJul 11UV 11Dec 22UV 3
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar6High
Apr7Very high
May9Very high
Jun10Extreme
Jul11Extreme
Aug9Very high
Sep10Very high
Oct6High
Nov4Moderate
Dec3Moderate

Air quality in Shirahama 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 Shirahama is worst in April — around 19 µg/m³ PM2.5 (moderate), about 1.9× the cleanest month (December, 10 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodApr 1319 µg/m³Dec 1310 µg/m³
PM2.5 (µg/m³)Level
Jan12Good
Feb15Moderate
Mar19Moderate
Apr19Moderate
May17Moderate
Jun14Moderate
Jul10Good
Aug10Good
Sep10Good
Oct10Good
Nov11Good
Dec10Good
Location & terrain

Where is Shirahama?

Shirahama sits at 33.7°N, 135.3°E, 13 m above sea level, in Japan. The nearest listed city is Tanabe, 6.0 km away.

Topography around Shirahama

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

Within 3 km, the terrain around Shirahama has only modest variations in elevation — a maximum elevation change of 148 m around an average of 22 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 789 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,877 m.

The land around Shirahama is covered by water (57%) and trees (26%) within 3 km, water (53%) and trees (41%) within 16 km, and water (54%) and trees (43%) within 80 km.

3 km
148 m
16 km
789 m
80 km
1,877 m
treesgrasslandcroplandartificial surfacesbare terrainwater
April weather nearby: Tanabe 6.0 km · Asso 6.0 km · Gobō 28 km · Itogawa 39 km · Kushimoto 46 km · Arida 49 km · Kainan 54 km · Shingū 59 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 Shirahama (33.6833°, 135.35°, elevation 13 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).