Minamishimabara weather in August

In August, Minamishimabara sees average daytime highs of 32°C and overnight lows near 25°C, with 179 mm of rain across 14.5 wet days and about 13.2 hours of daylight. It is the 1st-warmest and 5th-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 30% of the time in August, and the air most often feels oppressive.

Daylight stretches from about 13 h 36 min at the start of August to 12 h 42 min by month's end. Set against the rest of the year, August is Minamishimabara's 6th-clearest and 10th-windiest month. For the whole year in context, see Minamishimabara's year-round climate.

Daytime high
32°
1st warmest
Overnight low
25°
12th coldest
Rainfall
179 mm
14.5 wet days
Daylight
13 h 12 min
5:47 AM – 6:59 PM
Cloud cover
62%
6th clearest
Wind
8 km/h
10th windiest
Solar energy
5.09 kWh/m²
Travel score
3.5
out of 10

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 Minamishimabara reaches about 32°C in the afternoon and slips back to 25°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 29°C and 35°C. Set against its neighbours, August runs about 2°C warmer than July and about 3°C warmer than September.

20°25°30°35°40°151015202531
Avg high (°C)Avg low (°C)
13226
23326
33326
43326
53326
63326
73326
83326
93326
103326
113326
123226
133226
143226
153226
163226
173225
183225
193225
203225
213225
223225
233225
243225
253225
263125
273125
283125
293124
303124
313124

How August really feels in Minamishimabara

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.

Minamishimabara weather by month

How August compares with the rest of the year at a glance. August is the 1st-warmest and 5th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan11° / 707.710.12.7
Feb12° / 88910.83.2
Mar15° / 13411.611.84.6
Apr20° / 12°15110.912.86.1
May24° / 16°18211.113.76.6
Jun27° / 21°4291714.15.2
Jul30° / 24°34818.513.93.7
Aug32° / 25°17914.513.23.5
Sep29° / 22°20312.412.25.3
Oct24° / 17°1127.911.27.3
Nov18° / 12°1028.410.36.2
Dec13° / 817.69.93.9

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 30% 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 54%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14951
24951
34852
44753
54753
64753
74654
84555
94555
104456
114456
124456
134357
144357
154456
164456
174555
184555
194555
204654
214654
224654
234753
244753
254753
264654
274654
284555
294654
304555
314555

Chance of precipitation in August

Any precipitation

Minamishimabara gets around 179 mm of rain over 14.5 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 47% and peaks near 51% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%151015202531
Rain chance (%)
145
244
344
443
543
643
743
843
943
1044
1144
1245
1346
1447
1547
1648
1749
1849
1950
2050
2150
2251
2351
2451
2551
2651
2751
2851
2951
3050
3150

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 51% 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 (%)
10055045
20055144
30055144
40055243
50055243
60055243
70055243
80055342
90055342
100055243
110065143
120065143
130065143
140065143
150074943
160174943
170184843
180184842
190194841
2011104840
2111104939
2212114937
2312125036
2412135034
2513145032
2613155229
2714165227
2814175325
2905185423
3005195422
3106205420

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 36 min at the start of August to 12 h 42 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 5:36 AM to 5:57 AM, and sunset from 7:14 PM to 6:41 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.65:367:14
213.65:377:13
313.65:387:12
413.55:387:11
513.55:397:10
613.55:407:10
713.55:407:09
813.45:417:08
913.45:427:07
1013.45:427:06
1113.45:437:05
1213.35:447:04
1313.35:457:03
1413.35:457:02
1513.25:467:01
1613.25:476:59
1713.25:476:58
1813.25:486:57
1913.15:496:56
2013.15:496:55
2113.15:506:54
2213.05:516:53
2313.05:516:51
2413.05:526:50
2512.95:536:49
2612.95:536:48
2712.95:546:46
2812.85:556:45
2912.85:556:44
3012.85:566:42
3112.75:576:41

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 5.09 kWh/m².

For context, solar energy here swings from a low near 2.2 kWh/m² to a high of 5.28 kWh/m² in May across the year — August's 5.09 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
65.3Bright
75.3Bright
85.3Bright
95.3Bright
105.2Bright
115.2Bright
125.2Bright
135.2Bright
145.1Bright
155.1Bright
165.1Bright
175.0Bright
185.0Bright
195.0Bright
205.0Bright
214.9Bright
224.9Bright
234.9Bright
244.9Bright
254.8Bright
264.8Bright
274.8Bright
284.8Bright
294.7Bright
304.7Bright
314.7Bright
Planning a trip in August

Hazard calendar for Minamishimabara

In seasonPeak

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

Minamishimabara sits in the Pacific typhoon belt; the season peaks July–October.

Minamishimabara's rainy season runs June–July, when most of the year's rain falls.

Pacific typhoon
Rainy season
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is August a good time to visit Minamishimabara?

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

3.5
Sightseeing
10th-best month of the year
5.7
Beach & pool
3rd-best month of the year

August is a weaker month for outdoor sightseeing in Minamishimabara.

What to pack for Minamishimabara in August

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

In August, Minamishimabara sees daytime highs around 32°C and nights near 25°C. Pack light clothes and rain gear. Worth having: sun protection. About 15 days see rain.

light clothesrain gearsun protection

Sea temperature near Minamishimabara 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 May 26 to Nov 19 — about 5.9 months when the water holds above 20°C.

10°15°20°25°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan15Cool
Feb14Bracing
Mar15Bracing
Apr17Cool
May19Cool
Jun22Refreshing
Jul25Warm
Aug27Warm
Sep26Warm
Oct23Refreshing
Nov20Refreshing
Dec18Cool

UV index in Minamishimabara 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 Minamishimabara peaks around July 13 at about 10 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 21 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 highVery highModerateJul 13UV 10Dec 21UV 3
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar6High
Apr8Very high
May8Very high
Jun10Very high
Jul10Extreme
Aug9Very high
Sep10Very high
Oct7High
Nov4Moderate
Dec3Moderate

Air quality in Minamishimabara 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 Minamishimabara is worst in March — around 25 µg/m³ PM2.5 (moderate), about 1.9× the cleanest month (July, 13 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateMar 2325 µg/m³Jul 2114 µg/m³
PM2.5 (µg/m³)Level
Jan18Moderate
Feb20Moderate
Mar25Moderate
Apr25Moderate
May23Moderate
Jun19Moderate
Jul13Moderate
Aug15Moderate
Sep14Moderate
Oct14Moderate
Nov16Moderate
Dec15Moderate
Location & terrain

Where is Minamishimabara?

Minamishimabara sits at 32.7°N, 130.3°E, 129 m above sea level, in Japan. The nearest listed city is Unzen, 11 km away.

Topography around Minamishimabara

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

Within 3 km, the terrain around Minamishimabara has significant variations in elevation — a maximum elevation change of 418 m around an average of 129 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,450 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,717 m.

The land around Minamishimabara is covered by trees (70%) within 3 km, water (57%) and trees (32%) within 16 km, and trees (46%) and water (40%) within 80 km.

3 km
418 m
16 km
1,450 m
80 km
1,717 m
treesgrasslandcroplandartificial surfaceswater
August weather nearby: Unzen 11 km · Shimabara 15 km · Ōyanomachi-noboritate 18 km · Amakusa 25 km · Hondomachi-hondo 26 km · Isahaya 28 km · Nagasu 33 km · Honmachi 36 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 Minamishimabara (32.6733°, 130.2675°, elevation 129 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).