Sumoto weather in August

In August, Sumoto sees average daytime highs of 27°C and overnight lows near 26°C, with 99 mm of rain across 8.4 wet days and about 13.3 hours of daylight. It is the 1st-warmest and 9th-wettest month of the year here.

Day-to-day highs hold fairly steady near 27°C through the month. The sky is clear or mostly clear about 39% of the time in August, and the air most often feels miserable.

Daylight stretches from about 13 h 42 min at the start of August to 12 h 48 min by month's end. Set against the rest of the year, August is Sumoto's 3rd-clearest and 11th-windiest month. For the whole year in context, see Sumoto's year-round climate.

Daytime high
27°
1st warmest
Overnight low
26°
12th coldest
Rainfall
99 mm
8.4 wet days
Daylight
13 h 18 min
5:26 AM – 6:43 PM
Cloud cover
54%
3rd clearest
Wind
17 km/h
11th windiest
Solar energy
5.44 kWh/m²
Travel score
6.8
out of 10

Sumoto is city in Hyōgo Prefecture, Japan.

Density
231/km²
people per km²
Founded
2006

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

Temperature in August

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 27°C through the month.

A typical August day in Sumoto reaches about 27°C in the afternoon and slips back to 26°C overnight — a 2°C spread between the day's warmth and the night's chill. On most days the high lands between 26°C and 29°C. Set against its neighbours, August runs about 2°C warmer than July and about 2°C warmer than September.

20°23°25°28°30°151015202531
Avg high (°C)Avg low (°C)
12725
22725
32725
42726
52726
62726
72726
82726
92726
102726
112726
122726
132726
142726
152726
162726
172726
182726
192726
202726
212726
222726
232725
242725
252725
262725
272725
282725
292725
302725
312725

Sumoto weather by month

How August compares with the rest of the year at a glance. August is the 1st-warmest and 9th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan10° / 9613.80.6102.0
Feb10° / 9412.50.810.72.2
Mar13° / 13012.8011.73.4
Apr16° / 13°13310.8012.85.0
May19° / 17°15710.3013.86.1
Jun22° / 20°22713.2014.25.8
Jul26° / 24°18311.3014.16.4
Aug27° / 26°998.4013.36.8
Sep25° / 23°19011.8012.26.5
Oct22° / 18°19010.8011.16.6
Nov17° / 14°1039.2010.25.6
Dec12° / 9812.30.29.73.3

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 39% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 14% of August, with mostly cloudy or overcast conditions the remaining 46%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15446
25446
35545
45644
55644
65545
75545
85545
95545
105446
115446
125446
135446
145446
155446
165446
175347
185446
195446
205446
215347
225347
235347
245248
255248
265248
275248
285149
295149
305149
315149

Chance of precipitation in August

Any precipitation

Sumoto gets around 99 mm of rain over 8.4 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 28% and peaks near 36% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%50%151015202531
Rain chance (%)
124
224
324
424
523
623
723
824
924
1024
1125
1225
1326
1427
1527
1628
1728
1829
1929
2030
2130
2231
2331
2432
2532
2633
2733
2834
2935
3035
3136

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, August lands in the miserable band about 51% of days. Sticky, muggy-or-worse air turns up on roughly 98% of them.

0%25%50%75%100%151015202531
Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1033958
2033859
3033859
4033760
5043759
6043759
7043759
8043660
9043759
10043759
11043759
12143758
13143758
14143857
15153856
16153955
17153955
18263953
19274051
20274051
21284149
22294147
233104246
243114244
253124342
263134341
274144339
284154337
294174435
305184434
315194432

Wind in August

Winds average 17 km/h in August.

Across August, daily wind ranges from about 17 km/h on the calmest days to 18 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
117light breeze
217light breeze
317light breeze
417light breeze
517light breeze
617light breeze
717light breeze
817light breeze
917light breeze
1017light breeze
1117light breeze
1217light breeze
1317light breeze
1417light breeze
1517light breeze
1617light breeze
1717light breeze
1817light breeze
1917light breeze
2017light breeze
2117light breeze
2217light breeze
2317light breeze
2417light breeze
2517light breeze
2617light breeze
2717light breeze
2817light breeze
2917light breeze
3017light breeze
3118light breeze

Sunrise & sunset in August

DaylightNight

Daylight runs from about 13 h 42 min at the start of August to 12 h 48 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 54 minutes over August. Sunrise moves from 5:14 AM to 5:37 AM, and sunset from 6:59 PM to 6:24 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.75:146:59
213.75:156:58
313.75:166:57
413.75:176:56
513.65:176:55
613.65:186:54
713.65:196:53
813.55:206:52
913.55:206:51
1013.55:216:50
1113.45:226:49
1213.45:236:48
1313.45:236:47
1413.45:246:46
1513.35:256:45
1613.35:266:43
1713.35:266:42
1813.25:276:41
1913.25:286:40
2013.25:296:39
2113.15:296:37
2213.15:306:36
2313.15:316:35
2413.05:326:34
2513.05:326:32
2613.05:336:31
2712.95:346:30
2812.95:356:28
2912.95:356:27
3012.85:366:26
3112.85:376:24

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 5.44 kWh/m².

For context, solar energy here swings from a low near 2.41 kWh/m² to a high of 5.58 kWh/m² in May across the year — August's 5.44 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.7Bright
25.7Bright
35.7Bright
45.7Bright
55.7Bright
65.6Bright
75.6Bright
85.6Bright
95.6Bright
105.6Bright
115.5Bright
125.5Bright
135.5Bright
145.5Bright
155.5Bright
165.4Bright
175.4Bright
185.4Bright
195.3Bright
205.3Bright
215.3Bright
225.3Bright
235.2Bright
245.2Bright
255.2Bright
265.1Bright
275.1Bright
285.1Bright
295.0Bright
305.0Bright
314.9Bright
Planning a trip in August

Hazard calendar for Sumoto

In seasonPeak

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

Sumoto 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 Sumoto?

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

6.8
Sightseeing
1st-best month of the year
6.9
Beach & pool
1st-best month of the year

August is a reasonable time to visit Sumoto for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Sumoto in August

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

In August, Sumoto sees daytime highs around 27°C and nights near 26°C. Pack light clothes. Worth having: rain gear and sun protection. About 8 days see rain.

light clothesrain gearsun protection

Sea temperature near Sumoto in August

The nearest coast averages about 27°C in August — 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 27°C and coldest in February near 14°C.

It's comfortable for a long swim from Jun 5 to Nov 16 — about 5.4 months when the water holds above 20°C.

10°15°20°25°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan15Bracing
Feb14Bracing
Mar14Bracing
Apr16Cool
May18Cool
Jun21Refreshing
Jul25Warm
Aug27Warm
Sep26Warm
Oct23Refreshing
Nov20Refreshing
Dec17Cool

UV index in Sumoto in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August peaks around 8 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Sumoto peaks around July 10 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 10UV 10Dec 22UV 3
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar5High
Apr7High
May8Very high
Jun10Very high
Jul10Very high
Aug8Very high
Sep9Very high
Oct6High
Nov4Moderate
Dec3Moderate

Air quality in Sumoto 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 Sumoto is worst in April — around 26 µg/m³ PM2.5 (moderate), about 1.9× the cleanest month (October, 14 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateApr 1625 µg/m³Oct 1914 µg/m³
PM2.5 (µg/m³)Level
Jan16Moderate
Feb19Moderate
Mar24Moderate
Apr26Moderate
May24Moderate
Jun21Moderate
Jul22Moderate
Aug24Moderate
Sep17Moderate
Oct14Moderate
Nov16Moderate
Dec15Moderate
Location & terrain

Where is Sumoto?

Sumoto sits at 34.3°N, 134.9°E, -1 m above sea level, in Japan. The nearest listed city is Minamiawaji, 13 km away.

Topography around Sumoto

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

Within 3 km, the terrain around Sumoto has only modest variations in elevation — a maximum elevation change of 233 m around an average of 40 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 600 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,606 m.

The land around Sumoto is covered by trees (45%) and water (24%) within 3 km, water (50%) and trees (35%) within 16 km, and trees (42%) and water (41%) within 80 km.

3 km
233 m
16 km
600 m
80 km
1,606 m
treesgrasslandcroplandartificial surfacesbare terrainwater
August weather nearby: Minamiawaji 13 km · Awaji 15 km · Fukura 19 km · Minato 28 km · Wakayama 28 km · Narutochō-mitsuishi 30 km · Hannan 33 km · Sennan 35 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 Sumoto (34.3432°, 134.8891°, elevation -1 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).