Hamamatsu weather in June

In June, Hamamatsu sees average daytime highs of 26°C and overnight lows near 20°C, with 258 mm of rain across 15.7 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 25°C in the first days to 27°C by the end. The sky is clear or mostly clear about 12% 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 Hamamatsu's 12th-clearest and 9th-windiest month. For the whole year in context, see Hamamatsu's year-round climate.

Daytime high
26°
4th warmest
Overnight low
20°
9th coldest
Rainfall
258 mm
15.7 wet days
Daylight
14 h 18 min
4:40 AM – 6:59 PM
Cloud cover
79%
12th clearest
Wind
11 km/h
9th windiest
Solar energy
4.81 kWh/m²
Travel score
5.4
out of 10
Air quality
Good
PM2.5 9 µg/m³ · 2010

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 25°C in the first days to 27°C by the end.

A typical June day in Hamamatsu reaches about 26°C in the afternoon and slips back to 20°C overnight — a 6°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.

15°20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
12517
22518
32518
42518
52518
62518
72518
82519
92519
102519
112519
122519
132519
142619
152620
162620
172620
182620
192620
202620
212620
222721
232721
242721
252721
262721
272721
282722
292822
302822

How June really feels in Hamamatsu

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.

Hamamatsu 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
Jan10° / 705.90.19.92.7
Feb11° / 896.90.510.73.1
Mar14° / 14810.80.111.74.3
Apr19° / 10°16511.1012.85.9
May23° / 15°18412013.86.4
Jun26° / 20°25815.7014.35.4
Jul30° / 24°27316.9014.14.2
Aug31° / 25°15716.2013.33.8
Sep28° / 22°24715.8012.25.1
Oct23° / 16°21612.5011.16.4
Nov18° / 10°1229.2010.25.9
Dec13° / 716.609.73.9

Cloud cover in June

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 12% 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 78%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
13070
23070
32971
42872
52773
62773
72674
82674
92476
102377
112377
122278
132179
142080
152080
162080
171981
181882
191882
201882
211882
221981
231981
241981
251981
261981
272179
282179
292179
302179

Chance of precipitation in June

Any precipitation

Hamamatsu gets around 258 mm of rain over 15.7 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 54% and peaks near 59% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
141
242
343
445
546
647
748
849
950
1052
1153
1254
1355
1456
1557
1657
1757
1857
1957
2057
2157
2258
2358
2458
2558
2659
2759
2859
2959
3059

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 35% of days. Sticky, muggy-or-worse air turns up on roughly 46% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1183638810
2173439910
31532411110
41331421210
51229441420
61127451620
7925461720
8823461930
9721472140
10619472440
11517472650
12416462860
13314463170
14312443380
15211433590
162104137100
17193939120
18183741130
19173542151
20163343171
21053144191
22042944211
23042745232
24032445252
25032245282
26022045302
27021844333
28021744353
29011543374
30011442394

Wind in June

Winds average 11 km/h in June.

Across June, daily wind ranges from about 11 km/h on the calmest days to 11 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
111calm
211calm
311calm
411calm
511calm
611calm
711calm
811calm
911calm
1011calm
1111calm
1211calm
1311calm
1411calm
1511calm
1611calm
1711calm
1811calm
1911calm
2011calm
2111calm
2211calm
2311calm
2411calm
2511calm
2611calm
2711calm
2811calm
2911calm
3011calm

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 4:42 AM to 4:43 AM, and sunset from 6:51 PM to 7:01 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
114.14:426:51
214.24:426:52
314.24:416:52
414.24:416:53
514.24:416:53
614.24:416:54
714.24:416:55
814.24:406:55
914.34:406:56
1014.34:406:56
1114.34:406:57
1214.34:406:57
1314.34:406:58
1414.34:406:58
1514.34:406:58
1614.34:406:59
1714.34:406:59
1814.34:406:59
1914.34:407:00
2014.34:407:00
2114.34:417:00
2214.34:417:00
2314.34:417:01
2414.34:417:01
2514.34:417:01
2614.34:427:01
2714.34:427:01
2814.34:427:01
2914.34:437:01
3014.34:437:01

Solar energy in June

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in June, about 4.81 kWh/m².

For context, solar energy here swings from a low near 2.63 kWh/m² to a high of 5.38 kWh/m² in May across the year — June's 4.81 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.3Bright
25.3Bright
35.3Bright
45.2Bright
55.2Bright
65.1Bright
75.1Bright
85.0Bright
95.0Bright
104.9Bright
114.9Bright
124.8Bright
134.8Bright
144.7Bright
154.7Bright
164.7Bright
174.7Bright
184.6Bright
194.6Bright
204.6Bright
214.6Bright
224.6Bright
234.6Bright
244.6Bright
254.6Bright
264.6Bright
274.6Bright
284.7Bright
294.7Bright
304.7Bright
Planning a trip in June

Hazard calendar for Hamamatsu

In seasonPeak

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

Hamamatsu 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 June a good time to visit Hamamatsu?

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

5.4
Sightseeing
5th-best month of the year
5.2
Beach & pool
4th-best month of the year

June is a reasonable time to visit Hamamatsu for sightseeing.

What to pack for Hamamatsu in June

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

In June, Hamamatsu sees daytime highs around 26°C and nights near 20°C. Pack rain gear. Worth having: light clothes and sun protection. About 16 days see rain.

rain gearlight clothessun protection

Sea temperature near Hamamatsu in June

The nearest coast averages about 22°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 13 km away) is warmest in August at about 27°C and coldest in February near 16°C.

It's comfortable for a long swim from May 25 to Nov 28 — about 6.2 months when the water holds above 20°C.

15°20°25°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan16Cool
Feb16Cool
Mar16Cool
Apr17Cool
May19Cool
Jun22Refreshing
Jul25Warm
Aug27Warm
Sep26Warm
Oct23Refreshing
Nov21Refreshing
Dec19Cool

UV index in Hamamatsu 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 Hamamatsu peaks around July 15 at about 10 (very high) — 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 10 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highModerateJul 15UV 10Dec 22UV 3
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar5Moderate
Apr7High
May9Very high
Jun10Very high
Jul10Very high
Aug9Very high
Sep9Very high
Oct6High
Nov4Moderate
Dec3Moderate
Location & terrain

Where is Hamamatsu?

Hamamatsu sits at 34.7°N, 137.7°E, 3 m above sea level, in Japan. The nearest listed city is Iwata, 11 km away.

Topography around Hamamatsu

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

Within 3 km, the terrain around Hamamatsu has only modest variations in elevation — a maximum elevation change of 41 m around an average of 9 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 274 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,569 m.

The land around Hamamatsu is covered by artificial surfaces (87%) within 3 km, water (42%) and artificial surfaces (31%) within 16 km, and trees (44%) and water (43%) within 80 km.

3 km
41 m
16 km
274 m
80 km
2,569 m
treesgrasslandcroplandartificial surfacesbare terrainwater
June weather nearby: Iwata 11 km · Hamakita 12 km · Arai 15 km · Fukuroi 18 km · Kosai 19 km · Mori 24 km · Kakegawa 27 km · Shinshiro 31 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 Hamamatsu (34.7°, 137.7333°, elevation 3 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. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).