Kirishima weather in August

In August, Kirishima sees average daytime highs of 31°C and overnight lows near 24°C, with 174 mm of rain across 18.3 wet days and about 13.2 hours of daylight. It is the 1st-warmest and 6th-wettest month of the year here.

Day-to-day highs hold fairly steady near 31°C through the month. The sky is clear or mostly clear about 22% 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 Kirishima's 9th-clearest and 6th-windiest month. For the whole year in context, see Kirishima's year-round climate.

Daytime high
31°
1st warmest
Overnight low
24°
12th coldest
Rainfall
174 mm
18.3 wet days
Daylight
13 h 12 min
5:46 AM – 6:56 PM
Cloud cover
65%
9th clearest
Wind
8 km/h
6th windiest
Solar energy
4.84 kWh/m²
Travel score
3.8
out of 10

Temperature in August

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 31°C through the month.

A typical August day in Kirishima reaches about 31°C in the afternoon and slips back to 24°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 28°C and 33°C. Set against its neighbours, August runs about 1°C warmer than July and about 2°C warmer than September.

20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
13124
23124
33124
43124
53124
63124
73124
83124
93124
103124
113124
123124
133124
143124
153124
163124
173124
183124
193124
203024
213024
223024
233024
243024
253024
263024
273024
283023
293023
303023
313023

How August really feels in Kirishima

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.

Kirishima weather by month

How August compares with the rest of the year at a glance. August is the 1st-warmest and 6th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan11° / 808.310.22.8
Feb12° / 102910.83.3
Mar16° / 15712.911.84.6
Apr20° / 11°18111.812.85.9
May24° / 15°20511.713.66.4
Jun26° / 20°48819.9144.8
Jul30° / 24°29919.413.93.9
Aug31° / 24°17418.313.23.8
Sep28° / 21°2021512.25.2
Oct24° / 15°114911.27.1
Nov18° / 1078.210.46.2
Dec13° / 817.1104.0

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 22% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 20% of August, with mostly cloudy or overcast conditions the remaining 58%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14456
24357
34357
44357
54258
64159
74159
84159
94159
104060
114060
124060
134060
144060
154060
164060
174159
184258
194258
204357
214456
224456
234456
244357
254357
264357
274357
284258
294159
304159
314159

Chance of precipitation in August

Any precipitation

Kirishima gets around 174 mm of rain over 18.3 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 59% and peaks near 60% on the wettest days.

0%20%40%60%151015202531
Rain chance (%)
158
258
358
458
558
658
758
859
959
1059
1159
1259
1359
1458
1558
1658
1758
1858
1958
2058
2158
2258
2359
2459
2559
2659
2759
2860
2960
3060
3160

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 65% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1026929
2026830
3026830
4026731
5026632
6026533
7026434
8026434
9026335
10026236
11026236
12026236
13026236
14036136
15036235
16036334
17046333
18056332
19056431
20166429
21176428
22186526
23196525
24196723
251106722
262116621
272136619
282146618
292156617
302166616
312176615

Wind in August

Winds average 8 km/h in August.

Across August, daily wind ranges from about 7 km/h on the calmest days to 8 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
18calm
28calm
38calm
48calm
58calm
68calm
78calm
88calm
98calm
108calm
118calm
128calm
138calm
148calm
158calm
168calm
178calm
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 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 5:56 AM, and sunset from 7:10 PM to 6:38 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.65:367:10
213.55:377:09
313.55:377:08
413.55:387:08
513.55:397:07
613.45:397:06
713.45:407:05
813.45:417:04
913.45:417:03
1013.35:427:02
1113.35:437:01
1213.35:437:00
1313.35:446:59
1413.25:456:58
1513.25:456:57
1613.25:466:56
1713.15:476:55
1813.15:476:54
1913.15:486:53
2013.15:496:52
2113.05:496:51
2213.05:506:49
2313.05:506:48
2412.95:516:47
2512.95:526:46
2612.95:526:45
2712.85:536:43
2812.85:546:42
2912.85:546:41
3012.75:556:40
3112.75:566:38

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 4.84 kWh/m².

For context, solar energy here swings from a low near 2.57 kWh/m² to a high of 5 kWh/m² in May across the year — August's 4.84 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.1Bright
25.1Bright
35.1Bright
45.0Bright
55.0Bright
65.0Bright
75.0Bright
85.0Bright
95.0Bright
105.0Bright
114.9Bright
124.9Bright
134.9Bright
144.9Bright
154.9Bright
164.8Bright
174.8Bright
184.8Bright
194.8Bright
204.8Bright
214.7Bright
224.7Bright
234.7Bright
244.7Bright
254.6Bright
264.6Bright
274.6Bright
284.5Bright
294.5Bright
304.5Bright
314.5Bright
Planning a trip in August

Hazard calendar for Kirishima

In seasonPeak

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

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

Kirishima'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 Kirishima?

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

3.8
Sightseeing
10th-best month of the year
5.5
Beach & pool
3rd-best month of the year

August is a weaker month for outdoor sightseeing in Kirishima.

What to pack for Kirishima in August

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

In August, Kirishima sees daytime highs around 31°C and nights near 24°C. Pack light clothes and rain gear. Worth having: sun protection. About 18 days see rain.

light clothesrain gearsun protection

Sea temperature near Kirishima 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 43 km away) is warmest in August at about 28°C and coldest in February near 18°C.

It's comfortable for a long swim from Apr 24 to Dec 26 — about 8.1 months when the water holds above 20°C.

15°20°25°30°JanFebMarAprMayJunJulAugSepOctNovDeccoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan19Cool
Feb18Cool
Mar18Cool
Apr20Cool
May21Refreshing
Jun24Refreshing
Jul27Warm
Aug28Tropical
Sep27Warm
Oct25Warm
Nov23Refreshing
Dec21Refreshing

UV index in Kirishima 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 Kirishima peaks around June 23 at about 11 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 23 at about 3 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highExtremeVery highHighModerateJun 23UV 11Dec 23UV 3
UV index (midday)Level
Jan3Moderate
Feb5Moderate
Mar7High
Apr8Very high
May8Very high
Jun11Extreme
Jul11Extreme
Aug9Very high
Sep10Very high
Oct6High
Nov5Moderate
Dec3Moderate

Air quality in Kirishima 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 Kirishima is worst in April — around 23 µg/m³ PM2.5 (moderate), about 1.9× the cleanest month (October, 12 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateApr 1423 µg/m³Oct 1012 µg/m³
PM2.5 (µg/m³)Level
Jan15Moderate
Feb19Moderate
Mar22Moderate
Apr23Moderate
May21Moderate
Jun17Moderate
Jul12Moderate
Aug14Moderate
Sep12Moderate
Oct12Moderate
Nov14Moderate
Dec13Moderate
Location & terrain

Where is Kirishima?

Kirishima sits at 31.7°N, 130.8°E, 10 m above sea level, in Japan. The nearest listed city is Kokubu-matsuki, 1.0 km away.

Topography around Kirishima

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

Within 3 km, the terrain around Kirishima has only modest variations in elevation — a maximum elevation change of 219 m around an average of 29 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 603 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,680 m.

The land around Kirishima is covered by artificial surfaces (50%) and trees (27%) within 3 km, trees (61%) and water (25%) within 16 km, and trees (55%) and water (36%) within 80 km.

3 km
219 m
16 km
603 m
80 km
1,680 m
treesgrasslandcroplandartificial surfaceswater
August weather nearby: Kokubu-matsuki 1.0 km · Hamanoichi 4.0 km · Kajiki 9.0 km · Aira 17 km · Soo 24 km · Sueyoshichō-ninokata 26 km · Kagoshima 28 km · Miyakonojō 29 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 Kirishima (31.7409°, 130.7629°, elevation 10 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).