Hiroshima weather in June

In June, Hiroshima sees average daytime highs of 25°C and overnight lows near 18°C, with 215 mm of rain across 14.3 wet days and about 14.3 hours of daylight. It is the 4th-warmest and 2nd-wettest month of the year here.

Highs climb over the month, from about 24°C in the first days to 26°C by the end. The sky is clear or mostly clear about 13% of the time in June, and the air most often feels humid.

Daylight stretches from about 14 h 06 min at the start of June to 14 h 18 min by month's end. Set against the rest of the year, June is Hiroshima's 12th-clearest and 12th-windiest month. For the whole year in context, see Hiroshima's year-round climate.

Daytime high
25°
4th warmest
Overnight low
18°
9th coldest
Rainfall
215 mm
14.3 wet days
Daylight
14 h 18 min
5:02 AM – 7:19 PM
Cloud cover
78%
12th clearest
Wind
7 km/h
12th windiest
Solar energy
4.96 kWh/m²
Travel score
5.7
out of 10

Hiroshima is capital city of Hiroshima Prefecture, Japan.

Air quality
Moderate
PM2.5 11 µg/m³ · 2010
Density
1,327/km²
people per km²
Founded
1889

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in June

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 24°C in the first days to 26°C by the end.

A typical June day in Hiroshima reaches about 25°C in the afternoon and slips back to 18°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 22°C and 29°C. Set against its neighbours, June runs about 3°C warmer than May and about 4°C cooler than July.

10°15°20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
12416
22416
32416
42416
52516
62516
72517
82517
92517
102517
112517
122517
132518
142518
152518
162518
172518
182518
192619
202619
212619
222619
232619
242619
252620
262620
272620
282620
292720
302720

How June really feels in Hiroshima

Once humidity and wind are folded in, June 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

June sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Hiroshima weather by month

How June compares with the rest of the year at a glance. June is the 4th-warmest and 2nd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / 559.45.3101.2
Feb / 669.7410.71.7
Mar13° / 11011.71.711.73.4
Apr18° / 12410.30.112.85.7
May23° / 13°14310.3013.86.6
Jun25° / 18°21514.3014.35.7
Jul29° / 22°25116.1014.14.6
Aug30° / 23°15714013.34.3
Sep27° / 19°18812.6012.25.9
Oct22° / 13°1098.3011.16.9
Nov16° / 718.10.110.25.1
Dec10° / 649.62.99.72.4

Cloud cover in June

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 13% of the time in June, the cloudiest month of the year.

Beyond those clear spells, partly cloudy skies cover about 10% of June, with mostly cloudy or overcast conditions the remaining 77%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
13565
23466
33367
43268
53169
63169
72971
82971
92872
102872
112674
122674
132575
142476
152377
162278
172179
182179
192080
201981
211783
221783
231783
241783
251585
261585
271585
281585
291585
301684

Chance of precipitation in June

Any precipitation

Hiroshima gets around 215 mm of rain over 14.3 wet days in June. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 48% and peaks near 63% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
135
236
336
437
537
638
738
839
939
1040
1141
1242
1344
1445
1546
1648
1749
1850
1952
2053
2155
2256
2358
2459
2561
2661
2762
2863
2963
3063

Humidity in June

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, June lands in the humid band about 32% of days. Sticky, muggy-or-worse air turns up on roughly 30% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
137382140
234392340
331402451
428402561
526412661
624412771
721412882
819402992
9173930112
10153832123
11143733133
12123534153
13113335174
14103137184
1592938205
1682739215
1772539236
1862340247
1962040268
20518402710
21416392911
22414393013
23312383115
24311363317
2529353420
2628333522
2727313625
2816293727
2915273829
3014243932

Wind in June

Winds average 7 km/h in June, the calmest month.

Across June, daily wind ranges from about 7 km/h on the calmest days to 8 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
17calm
27calm
37calm
47calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
278calm
288calm
298calm
308calm

Sunrise & sunset in June

DaylightNight

Daylight runs from about 14 h 06 min at the start of June to 14 h 18 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 12 minutes over June. Sunrise moves from 5:04 AM to 5:05 AM, and sunset from 7:11 PM to 7:22 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
114.15:047:11
214.15:047:12
314.25:037:13
414.25:037:13
514.25:037:14
614.25:037:14
714.25:027:15
814.25:027:15
914.25:027:16
1014.25:027:16
1114.35:027:17
1214.35:027:17
1314.35:027:18
1414.35:027:18
1514.35:027:19
1614.35:027:19
1714.35:027:19
1814.35:027:20
1914.35:027:20
2014.35:027:20
2114.35:027:21
2214.35:037:21
2314.35:037:21
2414.35:037:21
2514.35:037:21
2614.35:047:21
2714.35:047:22
2814.35:047:22
2914.35:057:22
3014.35:057:22

Solar energy in June

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in June, about 4.96 kWh/m².

For context, solar energy here swings from a low near 2.18 kWh/m² to a high of 5.59 kWh/m² in May across the year — June's 4.96 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.5Bright
25.5Bright
35.5Bright
45.4Bright
55.4Bright
65.4Bright
75.3Bright
85.3Bright
95.3Bright
105.2Bright
115.2Bright
125.1Bright
135.1Bright
145.0Bright
155.0Bright
165.0Bright
174.9Bright
184.8Bright
194.8Bright
204.8Bright
214.7Bright
224.7Bright
234.6Bright
244.6Bright
254.6Bright
264.5Bright
274.5Bright
284.5Bright
294.5Bright
304.5Bright
Planning a trip in June

Hazard calendar for Hiroshima

In seasonPeak

In June, Hiroshima sits inside its pacific typhoon and rainy season season. The full year is below, with each hazard's peak months called out.

Hiroshima sits in the Pacific typhoon belt; the season peaks July–October.

Hiroshima's rainy season runs April–September, 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 June a good time to visit Hiroshima?

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

5.7
Sightseeing
4th-best month of the year
5.3
Beach & pool
4th-best month of the year

June is a reasonable time to visit Hiroshima for sightseeing.

What to pack for Hiroshima in June

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

In June, Hiroshima sees daytime highs around 25°C and nights near 18°C. Pack rain gear. Worth having: light clothes and sun protection. About 14 days see rain.

rain gearlight clothessun protection

Sea temperature near Hiroshima in June

The nearest coast averages about 20°C in June — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 31 km away) is warmest in August at about 26°C and coldest in February near 13°C.

It's comfortable for a long swim from Jun 13 to Nov 17 — about 5.2 months when the water holds above 20°C.

10°15°20°25°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan15Bracing
Feb13Bracing
Mar13Bracing
Apr15Bracing
May17Cool
Jun20Refreshing
Jul24Warm
Aug26Warm
Sep25Warm
Oct23Refreshing
Nov20Refreshing
Dec17Cool

UV index in Hiroshima in June

LowModerateHighVery highExtreme

Clear-sky midday UV in June peaks around 10 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Hiroshima peaks around July 13 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 highVery highModerateJul 13UV 10Dec 23UV 3
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar5High
Apr7Very high
May8Very high
Jun10Very high
Jul10Extreme
Aug9Very high
Sep9Very high
Oct6High
Nov4Moderate
Dec3Moderate

Air quality in Hiroshima in June

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where June falls, not just the annual average.

Air quality in Hiroshima is worst in April — around 16 µg/m³ PM2.5 (moderate), about 2.1× the cleanest month (October, 8 µg/m³).

Seasonal pattern from CAMS reanalysis, scaled to Hiroshima's WHO annual average of 11 µg/m³.

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodApr 1316 µg/m³Oct 178 µg/m³
PM2.5 (µg/m³)Level
Jan10Good
Feb12Good
Mar15Moderate
Apr16Moderate
May14Moderate
Jun13Moderate
Jul10Good
Aug10Good
Sep9Good
Oct8Good
Nov8Good
Dec8Good
Location & terrain

Where is Hiroshima?

Hiroshima sits at 34.4°N, 132.4°E, 16 m above sea level, in Japan. The nearest listed city is Gion, 4.0 km away.

Topography around Hiroshima

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

Within 3 km, the terrain around Hiroshima has significant variations in elevation — a maximum elevation change of 342 m around an average of 30 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 978 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,327 m.

The land around Hiroshima is covered by artificial surfaces (68%) within 3 km, trees (54%) and artificial surfaces (24%) within 16 km, and trees (64%) and water (29%) within 80 km.

3 km
342 m
16 km
978 m
80 km
1,327 m
treesgrasslandcroplandartificial surfacesbare terrainwater
June weather nearby: Gion 4.0 km · Fuchū 6.0 km · Kaitaichi 8.0 km · Hatsukaichi 12 km · Kumano 13 km · Miyajima 16 km · Etajima 18 km · Ōno-hara 21 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 Hiroshima (34.4°, 132.45°, elevation 16 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).