Shioiri weather in August

In August, Shioiri sees average daytime highs of 30°C and overnight lows near 25°C, with 106 mm of rain across 9.7 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 30°C through the month. The sky is clear or mostly clear about 36% of the time in August, and the air most often feels oppressive.

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 Shioiri's 4th-clearest and 10th-windiest month. For the whole year in context, see Shioiri's year-round climate.

Daytime high
30°
1st warmest
Overnight low
25°
12th coldest
Rainfall
106 mm
9.7 wet days
Daylight
13 h 18 min
5:30 AM – 6:47 PM
Cloud cover
57%
4th clearest
Wind
8 km/h
10th windiest
Solar energy
5.15 kWh/m²
Travel score
5.0
out of 10

Temperature in August

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 30°C through the month.

A typical August day in Shioiri reaches about 30°C in the afternoon and slips back to 25°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between 28°C and 32°C. Set against its neighbours, August runs about 2°C warmer than July and about 3°C warmer than September.

20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
13026
23026
33026
43026
53026
63026
73026
83026
93026
103026
113026
123026
133026
143026
153026
163026
173026
183025
193025
203025
213025
223025
233025
243025
253025
263025
273025
282925
292925
302925
312924

How August really feels in Shioiri

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.

Shioiri 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 / 599.91.6101.9
Feb10° / 649.51.510.72.2
Mar13° / 10211.50.311.73.5
Apr18° / 12°11010.6012.85.6
May22° / 16°13010.3013.86.5
Jun25° / 20°19113014.26.0
Jul29° / 24°17712.50145.2
Aug30° / 25°1069.7013.35.0
Sep27° / 22°16811.6012.26.1
Oct22° / 17°1349.5011.16.9
Nov17° / 11°688.1010.25.5
Dec12° / 6710.119.83.0

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 36% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 16% of August, with mostly cloudy or overcast conditions the remaining 49%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15248
25248
35248
45248
55248
65248
75248
85248
95149
105149
115149
125149
135149
145149
155149
165149
175149
185149
195248
205248
215248
225248
235248
245149
255149
265248
275248
285149
295149
305149
315050

Chance of precipitation in August

Any precipitation

Shioiri gets around 106 mm of rain over 9.7 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 32% and peaks near 36% on the wettest days.

0%10%20%30%40%50%151015202531
Rain chance (%)
131
231
331
431
530
630
730
830
930
1031
1131
1231
1331
1431
1531
1631
1731
1831
1931
2031
2132
2232
2332
2432
2533
2633
2734
2834
2935
3036
3136

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 58% of days. Sticky, muggy-or-worse air turns up on roughly 98% of them.

0%25%50%75%100%151015202531
Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
10146035
20046036
30045937
40045937
50045937
60045937
70045937
80045937
90045937
100046036
110155836
120155935
130156034
140165934
150166033
161175932
171185931
181295830
1912105829
2012115828
2112125926
2213135825
2313145824
2414165722
2514175721
2614185819
2715205618
2805215717
2906225715
3006245614
3107255513

Wind in August

Winds average 8 km/h in August.

Across August, daily wind ranges from about 8 km/h on the calmest days to 8 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
18calm
28calm
38calm
48calm
58calm
68calm
78calm
88calm
98calm
108calm
118calm
128calm
138calm
148calm
158calm
168calm
178calm
188calm
198calm
208calm
218calm
228calm
238calm
248calm
258calm
268calm
278calm
288calm
298calm
308calm
318calm

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 5:19 AM to 5:41 AM, and sunset from 7:02 PM to 6:28 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.75:197:02
213.75:207:01
313.75:207:01
413.65:217:00
513.65:226:59
613.65:236:58
713.65:236:57
813.55:246:56
913.55:256:55
1013.55:266:54
1113.45:266:53
1213.45:276:52
1313.45:286:51
1413.35:296:50
1513.35:296:48
1613.35:306:47
1713.35:316:46
1813.25:326:45
1913.25:326:44
2013.25:336:42
2113.15:346:41
2213.15:356:40
2313.15:356:39
2413.05:366:37
2513.05:376:36
2613.05:386:35
2712.95:386:34
2812.95:396:32
2912.95:406:31
3012.85:406:29
3112.85:416:28

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 5.15 kWh/m².

For context, solar energy here swings from a low near 2.35 kWh/m² to a high of 5.54 kWh/m² in May across the year — August's 5.15 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.4Bright
25.4Bright
35.4Bright
45.4Bright
55.4Bright
65.4Bright
75.4Bright
85.3Bright
95.3Bright
105.3Bright
115.3Bright
125.3Bright
135.2Bright
145.2Bright
155.2Bright
165.2Bright
175.1Bright
185.1Bright
195.1Bright
205.0Bright
215.0Bright
225.0Bright
234.9Bright
244.9Bright
254.9Bright
264.8Bright
274.8Bright
284.8Bright
294.7Bright
304.7Bright
314.6Bright
Planning a trip in August

Hazard calendar for Shioiri

In seasonPeak

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

Shioiri 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 Shioiri?

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

5.0
Sightseeing
8th-best month of the year
6.9
Beach & pool
1st-best month of the year

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

What to pack for Shioiri in August

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

In August, Shioiri sees daytime highs around 30°C and nights near 25°C. Pack light clothes. Worth having: rain gear and sun protection. About 10 days see rain.

light clothesrain gearsun protection

Sea temperature near Shioiri in August

The nearest coast averages about 28°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 21 km away) is warmest in August at about 28°C and coldest in February near 13°C.

It's comfortable for a long swim from Jun 3 to Nov 12 — 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
Mar13Bracing
Apr15Bracing
May18Cool
Jun22Refreshing
Jul25Warm
Aug28Warm
Sep27Warm
Oct24Refreshing
Nov20Cool
Dec16Cool

UV index in Shioiri 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 Shioiri peaks around June 23 at about 10 (extreme) — 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 11 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highExtremeVery highModerateJun 23UV 10Dec 22UV 3
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar6High
Apr8Very high
May9Very high
Jun11Extreme
Jul10Extreme
Aug9Very high
Sep10Very high
Oct7High
Nov4Moderate
Dec3Moderate

Air quality in Shioiri 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 Shioiri is worst in April — around 24 µg/m³ PM2.5 (moderate), about 1.7× the cleanest month (December, 14 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateApr 1324 µg/m³Dec 1414 µg/m³
PM2.5 (µg/m³)Level
Jan16Moderate
Feb19Moderate
Mar23Moderate
Apr24Moderate
May22Moderate
Jun20Moderate
Jul17Moderate
Aug17Moderate
Sep16Moderate
Oct14Moderate
Nov15Moderate
Dec14Moderate
Location & terrain

Where is Shioiri?

Shioiri sits at 34.2°N, 133.9°E, 150 m above sea level, in Japan. The nearest listed city is Zentsujichó, 10 km away.

Topography around Shioiri

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

Within 3 km, the terrain around Shioiri has significant variations in elevation — a maximum elevation change of 463 m around an average of 174 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 1,039 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,914 m.

The land around Shioiri is covered by trees (64%) within 3 km, trees (67%) within 16 km, and trees (57%) and water (30%) within 80 km.

3 km
463 m
16 km
1,039 m
80 km
1,914 m
treesgrasslandcroplandartificial surfaceswater
August weather nearby: Zentsujichó 10 km · Takinomiya 12 km · Ikedachō 15 km · Marugame 15 km · Tadotsu 16 km · Utazu 16 km · Mitoyo 17 km · Sakaidechō 19 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 Shioiri (34.1561°, 133.8515°, elevation 150 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).