Seto weather in August

In August, Seto sees average daytime highs of 32°C and overnight lows near 24°C, with 112 mm of rain across 11.8 wet days and about 13.3 hours of daylight. It is the 1st-warmest and 7th-wettest month of the year here.

Day-to-day highs hold fairly steady near 32°C through the month. The sky is clear or mostly clear about 32% of the time in August, and the air most often feels oppressive.

Daylight stretches from about 13 h 48 min at the start of August to 12 h 48 min by month's end. Set against the rest of the year, August is Seto's 8th-clearest and 12th-windiest month. For the whole year in context, see Seto's year-round climate.

Daytime high
32°
1st warmest
Overnight low
24°
12th coldest
Rainfall
112 mm
11.8 wet days
Daylight
13 h 18 min
5:16 AM – 6:36 PM
Cloud cover
58%
8th clearest
Wind
7 km/h
12th windiest
Solar energy
5.11 kWh/m²
Travel score
3.7
out of 10

Seto is city in Aichi prefecture, Japan.

Founded
1929

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 32°C through the month.

A typical August day in Seto reaches about 32°C in the afternoon and slips back to 24°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 29°C and 36°C. Set against its neighbours, August runs about 2°C warmer than July and about 4°C warmer than September.

20°25°30°35°40°151015202531
Avg high (°C)Avg low (°C)
13325
23325
33325
43325
53325
63325
73325
83325
93325
103325
113325
123325
133325
143325
153325
163325
173324
183324
193224
203224
213224
223224
233224
243224
253224
263224
273224
283223
293223
303123
313123

How August really feels in Seto

Once humidity and wind are folded in, August averages 31 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
31
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

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

Seto weather by month

How August compares with the rest of the year at a glance. August is the 1st-warmest and 7th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / 545.70.39.92.2
Feb11° / 606.50.610.72.7
Mar14° / 11010.1011.74.3
Apr19° / 12310.6012.96.1
May24° / 14°14410.6013.86.7
Jun27° / 19°17814.3014.35.5
Jul31° / 23°19015014.14.0
Aug32° / 24°11211.8013.33.7
Sep29° / 20°18612.1012.25.3
Oct23° / 14°17110.3011.16.8
Nov17° / 857.2010.15.9
Dec12° / 5560.19.73.5

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 32% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 18% of August, with mostly cloudy or overcast conditions the remaining 50%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14852
24951
34951
45050
55050
65149
75248
85149
95149
105149
115149
125149
135149
145050
155050
165050
175050
185050
195050
205050
215050
225050
235050
244951
254951
264951
274951
284951
294852
304852
314951

Chance of precipitation in August

Any precipitation

Seto gets around 112 mm of rain over 11.8 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 38% and peaks near 40% on the wettest days.

0%10%20%30%40%50%151015202531
Rain chance (%)
138
238
338
438
538
637
737
837
938
1038
1138
1238
1338
1438
1538
1638
1738
1838
1938
2038
2138
2238
2338
2438
2538
2639
2739
2839
2940
3040
3140

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 62% of days. Sticky, muggy-or-worse air turns up on roughly 95% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1001146718
2001146619
3001136719
4001136620
5001136620
6001146520
7001146520
8001146520
9001146520
10002146420
11002146519
12002146519
13002146519
14012146518
15013146418
16113156317
17113156416
18114166315
19114166315
20115176214
21115186213
22116196112
23117206011
24117216010
2511823589
2601824598
2701925578
28011026567
29011027566
30021128536
31021129535

Wind in August

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

Across August, daily wind ranges from about 7 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
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
277calm
287calm
297calm
307calm
317calm

Sunrise & sunset in August

DaylightNight

Daylight runs from about 13 h 48 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 60 minutes over August. Sunrise moves from 5:04 AM to 5:27 AM, and sunset from 6:51 PM to 6:16 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.85:046:51
213.85:056:51
313.75:056:50
413.75:066:49
513.75:076:48
613.75:086:47
713.65:086:46
813.65:096:45
913.65:106:44
1013.55:116:43
1113.55:126:42
1213.55:126:40
1313.45:136:39
1413.45:146:38
1513.45:156:37
1613.35:166:36
1713.35:166:35
1813.35:176:33
1913.25:186:32
2013.25:196:31
2113.25:196:30
2213.15:206:28
2313.15:216:27
2413.15:226:26
2513.05:236:24
2613.05:236:23
2713.05:246:22
2812.95:256:20
2912.95:266:19
3012.95:266:17
3112.85:276:16

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 5.11 kWh/m².

For context, solar energy here swings from a low near 2.49 kWh/m² to a high of 5.46 kWh/m² in May across the year — August's 5.11 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.3Bright
25.3Bright
35.3Bright
45.3Bright
55.3Bright
65.3Bright
75.3Bright
85.3Bright
95.2Bright
105.2Bright
115.2Bright
125.2Bright
135.2Bright
145.1Bright
155.1Bright
165.1Bright
175.1Bright
185.0Bright
195.0Bright
205.0Bright
215.0Bright
225.0Bright
234.9Bright
244.9Bright
254.9Bright
264.8Bright
274.8Bright
284.8Bright
294.7Bright
304.7Bright
314.7Bright
Planning a trip in August

Hazard calendar for Seto

In seasonPeak

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

Seto 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 Seto?

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

3.7
Sightseeing
9th-best month of the year
6.1
Beach & pool
2nd-best month of the year

August is a weaker month for outdoor sightseeing in Seto. The water and warmth also suit a beach or pool day.

What to pack for Seto in August

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

In August, Seto sees daytime highs around 32°C and nights near 24°C. Pack light clothes. Worth having: rain gear and sun protection. About 12 days see rain.

light clothesrain gearsun protection

Sea temperature near Seto 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 at the nearest coast (about 45 km away) is warmest in August at about 27°C and coldest in February near 13°C.

It's comfortable for a long swim from May 31 to Nov 9 — about 5.4 months when the water holds above 20°C.

10°15°20°25°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan14Bracing
Feb13Bracing
Mar14Bracing
Apr15Cool
May18Cool
Jun22Refreshing
Jul25Warm
Aug27Warm
Sep26Warm
Oct22Refreshing
Nov19Cool
Dec17Cool

UV index in Seto 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 Seto peaks around July 12 at about 10 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 23 at about 2 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highModerateJul 12UV 10Dec 23UV 2
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar5Moderate
Apr7High
May8Very high
Jun10Very high
Jul10Very high
Aug8Very high
Sep9Very high
Oct6High
Nov4Moderate
Dec2Moderate

Air quality in Seto 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 Seto is worst in April — around 22 µg/m³ PM2.5 (moderate), about 1.6× the cleanest month (December, 13 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateApr 1322 µg/m³Dec 1813 µg/m³
PM2.5 (µg/m³)Level
Jan14Moderate
Feb17Moderate
Mar21Moderate
Apr22Moderate
May21Moderate
Jun19Moderate
Jul15Moderate
Aug14Moderate
Sep14Moderate
Oct15Moderate
Nov15Moderate
Dec13Moderate
Location & terrain

Where is Seto?

Seto sits at 35.2°N, 137.1°E, 111 m above sea level, in Japan. The nearest listed city is Owariasahi, 7.0 km away.

Topography around Seto

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

Within 3 km, the terrain around Seto has only modest variations in elevation — a maximum elevation change of 181 m around an average of 140 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 714 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,926 m.

The land around Seto is covered by artificial surfaces (47%) and trees (44%) within 3 km, trees (55%) and artificial surfaces (35%) within 16 km, and trees (64%) within 80 km.

3 km
181 m
16 km
714 m
80 km
2,926 m
treesgrasslandcroplandartificial surfacesbare terrainwater
August weather nearby: Owariasahi 7.0 km · Nagakute 8.0 km · Tajimi 10 km · Nisshin 12 km · Kasugai 12 km · Toki 15 km · Morowa 15 km · Miyoshi 16 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 Seto (35.2333°, 137.1°, elevation 111 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).