Shirakawa weather in August

In August, Shirakawa sees average daytime highs of 28°C and overnight lows near 21°C, with 146 mm of rain across 16.1 wet days and about 13.4 hours of daylight. It is the 1st-warmest and 4th-wettest month of the year here.

Highs ease over the month, from about 29°C in the first days to 27°C by the end. The sky is clear or mostly clear about 17% of the time in August, and the air most often feels oppressive.

Daylight stretches from about 13 h 54 min at the start of August to 12 h 54 min by month's end. Set against the rest of the year, August is Shirakawa's 10th-clearest and 11th-windiest month. For the whole year in context, see Shirakawa's year-round climate.

Daytime high
28°
1st warmest
Overnight low
21°
12th coldest
Rainfall
146 mm
16.1 wet days
Daylight
13 h 24 min
5:00 AM – 6:26 PM
Cloud cover
71%
10th clearest
Wind
6 km/h
11th windiest
Solar energy
4.45 kWh/m²
Travel score
5.0
out of 10

Temperature in August

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 29°C in the first days to 27°C by the end.

A typical August day in Shirakawa reaches about 28°C in the afternoon and slips back to 21°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 23°C and 32°C. Set against its neighbours, August runs about 1°C warmer than July and about 4°C warmer than September.

15°20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
12921
22921
32921
42921
52921
62921
72921
82921
92921
102921
112921
122921
132921
142821
152821
162821
172821
182821
192821
202821
212821
222821
232820
242720
252720
262720
272720
282720
292720
302720
312720

How August really feels in Shirakawa

Once humidity and wind are folded in, August 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

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

Shirakawa weather by month

How August compares with the rest of the year at a glance. August is the 1st-warmest and 4th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -2°537.46.19.70.0
Feb / -2°517.44.910.60.3
Mar / 9811.94.711.71.9
Apr15° / 112121.112.94.4
May20° / 11°128130145.8
Jun23° / 16°14315.5014.55.6
Jul27° / 20°19518.8014.34.9
Aug28° / 21°14616.1013.45.0
Sep24° / 17°17815012.35.7
Oct18° / 11°15912.10115.5
Nov13° / 788.10.3103.7
Dec / 517.43.49.51.1

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 17% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 15% of August, with mostly cloudy or overcast conditions the remaining 68%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13367
23367
33367
43367
53367
63367
73367
83367
93268
103268
113169
123169
133169
143169
153169
163169
173070
183169
193169
203169
213169
223268
233268
243268
253268
263268
273268
283268
293268
303367
313367

Chance of precipitation in August

Any precipitation

Shirakawa gets around 146 mm of rain over 16.1 wet days in August. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 52% and peaks near 54% on the wettest days.

0%20%40%60%151015202531
Rain chance (%)
150
249
349
449
549
650
750
850
951
1051
1152
1252
1353
1453
1553
1653
1753
1853
1953
2053
2153
2253
2353
2453
2554
2654
2754
2854
2954
3054
3154

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, August lands in the oppressive band about 42% of days. Sticky, muggy-or-worse air turns up on roughly 80% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1031037490
2031036510
3031035520
4031035520
5031034530
6031134520
7031134511
8031133521
9031133521
10031134511
11031234501
12031235491
13131235481
14131236471
15131237461
16141338441
17141338431
18141438421
19151439411
20151539391
21151639381
22151739371
23161939360
24162039340
25162139330
26162239320
27172439300
28172539290
29172638270
30182738260
31182938250

Wind in August

Winds average 6 km/h in August.

Across August, daily wind ranges from about 6 km/h on the calmest days to 7 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
16calm
26calm
36calm
46calm
56calm
66calm
76calm
86calm
96calm
106calm
116calm
126calm
136calm
146calm
156calm
166calm
176calm
186calm
196calm
206calm
216calm
226calm
236calm
246calm
256calm
266calm
276calm
287calm
297calm
307calm
317calm

Sunrise & sunset in August

DaylightNight

Daylight runs from about 13 h 54 min at the start of August to 12 h 54 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 60 minutes over August. Sunrise moves from 4:47 AM to 5:13 AM, and sunset from 6:43 PM to 6:05 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.94:476:43
213.94:486:42
313.94:496:41
413.84:506:40
513.84:516:39
613.84:516:38
713.74:526:37
813.74:536:36
913.74:546:34
1013.64:556:33
1113.64:566:32
1213.64:576:31
1313.54:576:30
1413.54:586:29
1513.54:596:27
1613.45:006:26
1713.45:016:25
1813.45:026:24
1913.35:036:22
2013.35:036:21
2113.35:046:20
2213.25:056:18
2313.25:066:17
2413.15:076:15
2513.15:086:14
2613.15:096:13
2713.05:096:11
2813.05:106:10
2913.05:116:08
3012.95:126:07
3112.95:136:05

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 4.45 kWh/m².

For context, solar energy here swings from a low near 2.28 kWh/m² to a high of 5.24 kWh/m² in May across the year — August's 4.45 kWh/m² falls in the middle.

024151015202531
Solar energy (kWh/m²)Level
14.8Bright
24.8Bright
34.8Bright
44.8Bright
54.8Bright
64.7Bright
74.7Bright
84.7Bright
94.7Bright
104.6Bright
114.6Bright
124.6Bright
134.5Bright
144.5Bright
154.5Bright
164.4Bright
174.4Bright
184.4Bright
194.3Bright
204.3Bright
214.3Bright
224.3Bright
234.2Bright
244.2Bright
254.2Bright
264.1Bright
274.1Bright
284.1Bright
294.1Bright
304.0Bright
314.0Bright
Planning a trip in August

Hazard calendar for Shirakawa

In seasonPeak

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

Shirakawa 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 August a good time to visit Shirakawa?

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

5.0
Sightseeing
5th-best month of the year
5.7
Beach & pool
1st-best month of the year

August is a reasonable time to visit Shirakawa for sightseeing.

What to pack for Shirakawa in August

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

In August, Shirakawa sees daytime highs around 28°C and nights near 21°C. Pack light clothes and rain gear. About 16 days see rain.

light clothesrain gear

Sea temperature near Shirakawa in August

The nearest coast averages about 24°C in August — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 61 km away) is warmest in August at about 24°C and coldest in March near 12°C.

It's comfortable for a long swim from Jul 1 to Oct 22 — about 3.7 months when the water holds above 20°C.

10°15°20°25°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmcomfortable to swim
Sea temperature (°C)Comfort
Jan14Bracing
Feb12Bracing
Mar12Bracing
Apr14Bracing
May16Cool
Jun19Cool
Jul21Refreshing
Aug24Refreshing
Sep23Refreshing
Oct20Refreshing
Nov18Cool
Dec16Cool

UV index in Shirakawa in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August peaks around 9 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Shirakawa peaks around July 17 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near January 1 at about 2 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 10 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highModerateJul 17UV 9Jan 1UV 2
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar5Moderate
Apr7High
May8Very high
Jun9Very high
Jul9Very high
Aug9Very high
Sep8Very high
Oct6High
Nov3Moderate
Dec2Low

Air quality in Shirakawa in August

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in Shirakawa is worst in April — around 21 µg/m³ PM2.5 (moderate), about 2.5× the cleanest month (December, 9 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodApr 1821 µg/m³Dec 189 µg/m³
PM2.5 (µg/m³)Level
Jan10Good
Feb13Moderate
Mar19Moderate
Apr21Moderate
May20Moderate
Jun16Moderate
Jul14Moderate
Aug13Moderate
Sep11Good
Oct11Good
Nov10Good
Dec9Good
Location & terrain

Where is Shirakawa?

Shirakawa sits at 37.1°N, 140.3°E, 323 m above sea level, in Japan. The nearest listed city is Kumakura, 9.0 km away.

Topography around Shirakawa

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

Within 3 km, the terrain around Shirakawa has only modest variations in elevation — a maximum elevation change of 172 m around an average of 353 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 561 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,457 m.

The land around Shirakawa is covered by trees (48%) and cropland (35%) within 3 km, trees (66%) and cropland (22%) within 16 km, and trees (74%) within 80 km.

3 km
172 m
16 km
561 m
80 km
2,457 m
treesgrasslandcroplandartificial surfacesbare terrainwater
August weather nearby: Kumakura 9.0 km · Yabuki 10 km · Ishikawa 17 km · Nasu 17 km · Sukagawa 21 km · Nasushiobara 24 km · Kuroiso 25 km · Kōriyama 33 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 Shirakawa (37.1195°, 140.2621°, elevation 323 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).