Hamamatsu weather in July

In July, Hamamatsu sees average daytime highs of 30°C and overnight lows near 24°C, with 273 mm of rain across 16.9 wet days and about 14.1 hours of daylight. It is the 2nd-warmest and 1st-wettest month of the year here.

Highs climb over the month, from about 28°C in the first days to 31°C by the end. The sky is clear or mostly clear about 19% of the time in July, and the air most often feels oppressive.

Daylight stretches from about 14 h 18 min at the start of July to 13 h 48 min by month's end. Set against the rest of the year, July is Hamamatsu's 11th-clearest and 10th-windiest month. For the whole year in context, see Hamamatsu's year-round climate.

Daytime high
30°
2nd warmest
Overnight low
24°
11th coldest
Rainfall
273 mm
16.9 wet days
Daylight
14 h 06 min
4:51 AM – 6:58 PM
Cloud cover
72%
11th clearest
Wind
10 km/h
10th windiest
Solar energy
5.03 kWh/m²
Travel score
4.2
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 July

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 28°C in the first days to 31°C by the end.

A typical July day in Hamamatsu reaches about 30°C in the afternoon and slips back to 24°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 26°C and 34°C. Set against its neighbours, July runs about 4°C warmer than June and about 1°C cooler than August.

15°20°25°30°35°40°151015202531
Avg high (°C)Avg low (°C)
12822
22822
32822
42822
52923
62923
72923
82923
92923
102923
112923
122923
133024
143024
153024
163024
173024
183024
193024
203024
213124
223124
233124
243124
253125
263125
273125
283125
293125
303125
313125

How July really feels in Hamamatsu

Once humidity and wind are folded in, July averages 22 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
22
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

The story in July is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Hamamatsu weather by month

How July compares with the rest of the year at a glance. July is the 2nd-warmest and 1st-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 July

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 19% of the time in July.

Beyond those clear spells, partly cloudy skies cover about 13% of July, with mostly cloudy or overcast conditions the remaining 68%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
12278
22278
32377
42377
52476
62575
72575
82674
92674
102674
112773
122872
132872
142971
152971
163169
173169
183169
193268
203367
213466
223565
233664
243862
253961
264060
274159
284357
294456
304456
314654

Chance of precipitation in July

Any precipitation

Hamamatsu gets around 273 mm of rain over 16.9 wet days in July, the wettest month. 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 ease toward the end of the month.

0%20%40%60%151015202531
Rain chance (%)
159
259
359
459
559
659
759
858
958
1057
1157
1256
1355
1454
1553
1652
1751
1851
1951
2050
2150
2250
2350
2450
2550
2650
2751
2851
2952
3052
3153

Humidity in July

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, July lands in the oppressive band about 56% of days. Sticky, muggy-or-worse air turns up on roughly 96% of them.

0%25%50%75%100%151015202531
Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
111241414
211140435
311039455
40938476
50837496
60736507
70635518
80634528
90533539
100432559
1104315510
1203305611
1303295711
1403285712
1502275912
1602266012
1702256013
1802246014
1901236214
2001226215
2101226116
2201216117
2301206118
2401196119
2501186120
2601176121
2701176022
2801166023
2901156024
3001155925
3101145926

Wind in July

Winds average 10 km/h in July.

Across July, daily wind ranges from about 10 km/h on the calmest days to 11 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
111calm
211calm
311calm
411calm
511calm
611calm
711calm
811calm
911calm
1010calm
1110calm
1210calm
1310calm
1410calm
1510calm
1610calm
1710calm
1810calm
1910calm
2010calm
2110calm
2210calm
2310calm
2410calm
2510calm
2610calm
2710calm
2810calm
2910calm
3010calm
3110calm

Sunrise & sunset in July

DaylightNight

Daylight runs from about 14 h 18 min at the start of July to 13 h 48 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 30 minutes over July. Sunrise moves from 4:43 AM to 5:02 AM, and sunset from 7:01 PM to 6:49 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.34:437:01
214.34:447:01
314.34:447:01
414.34:457:01
514.34:457:01
614.34:467:01
714.24:467:01
814.24:477:01
914.24:477:00
1014.24:487:00
1114.24:487:00
1214.24:497:00
1314.24:496:59
1414.14:506:59
1514.14:516:59
1614.14:516:58
1714.14:526:58
1814.14:526:57
1914.14:536:57
2014.04:546:56
2114.04:546:56
2214.04:556:55
2314.04:566:54
2414.04:576:54
2513.94:576:53
2613.94:586:53
2713.94:596:52
2813.94:596:51
2913.85:006:50
3013.85:016:49
3113.85:026:49

Solar energy in July

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in July, about 5.03 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 — July's 5.03 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
14.7Bright
24.7Bright
34.7Bright
44.8Bright
54.8Bright
64.8Bright
74.8Bright
84.8Bright
94.9Bright
104.9Bright
114.9Bright
125.0Bright
135.0Bright
145.0Bright
155.0Bright
165.1Bright
175.1Bright
185.1Bright
195.1Bright
205.2Bright
215.2Bright
225.2Bright
235.2Bright
245.2Bright
255.3Bright
265.3Bright
275.3Bright
285.3Bright
295.3Bright
305.3Bright
315.3Bright
Planning a trip in July

Hazard calendar for Hamamatsu

In seasonPeak

In July, 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 July a good time to visit Hamamatsu?

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

4.2
Sightseeing
8th-best month of the year
5.6
Beach & pool
3rd-best month of the year

July is a reasonable time to visit Hamamatsu for sightseeing.

What to pack for Hamamatsu in July

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

In July, Hamamatsu sees daytime highs around 30°C and nights near 24°C. Pack light clothes and rain gear. Worth having: sun protection. About 17 days see rain.

light clothesrain gearsun protection

Sea temperature near Hamamatsu in July

The nearest coast averages about 25°C in July — 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 July

LowModerateHighVery highExtreme

Clear-sky midday UV in July 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
July 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).