Miyama weather in August

In August, Miyama sees average daytime highs of 31°C and overnight lows near 25°C, with 159 mm of rain across 12.7 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 31°C through the month. The sky is clear or mostly clear about 33% 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 Miyama's 5th-clearest and 11th-windiest month. For the whole year in context, see Miyama's year-round climate.

Daytime high
31°
1st warmest
Overnight low
25°
12th coldest
Rainfall
159 mm
12.7 wet days
Daylight
13 h 12 min
5:45 AM – 6:59 PM
Cloud cover
60%
5th clearest
Wind
8 km/h
11th windiest
Solar energy
4.86 kWh/m²
Travel score
4.2
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 Miyama reaches about 31°C in the afternoon and slips back to 25°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 28°C and 34°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)
13125
23125
33125
43125
53125
63226
73226
83126
93126
103125
113125
123125
133125
143125
153125
163125
173125
183125
193125
203125
213125
223125
233125
243125
253125
263124
273024
283024
293024
303024
313024

How August really feels in Miyama

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.

Miyama 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° / 628.110.12.6
Feb12° / 828.810.83.0
Mar15° / 12811.711.74.4
Apr20° / 12°14510.912.86.0
May24° / 16°17211.113.76.6
Jun26° / 20°39316.714.15.3
Jul30° / 24°33016.7144.3
Aug31° / 25°15912.713.24.2
Sep28° / 22°16510.812.25.8
Oct24° / 16°1017.411.27.4
Nov18° / 11°907.810.36.1
Dec13° / 727.79.93.7

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 33% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 15% of August, with mostly cloudy or overcast conditions the remaining 52%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15149
25050
35050
44951
54951
64951
74951
84852
94753
104753
114753
124654
134654
144654
154654
164654
174654
184654
194654
204753
214852
224852
234852
244852
254852
264852
274753
284852
294852
304852
314852

Chance of precipitation in August

Any precipitation

Miyama gets around 159 mm of rain over 12.7 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 42% and peaks near 45% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%151015202531
Rain chance (%)
137
237
337
437
537
637
737
837
938
1039
1140
1241
1342
1443
1543
1644
1745
1845
1945
2045
2145
2245
2345
2445
2545
2644
2744
2844
2943
3043
3142

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 46% of days. Sticky, muggy-or-worse air turns up on roughly 99% of them.

0%25%50%75%100%151015202531
Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
10024157
20014158
30014257
40014257
50014257
60014356
70014356
80024355
90024355
100024454
110024454
120034453
130034453
140034453
150044452
160044452
170154450
180164449
191164547
201174546
211184644
221194742
2312104840
2412114938
2512125035
2613135033
2713145230
2803155428
2904175326
3004185523
3104195621

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 5:34 AM to 5:55 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)
113.75:347:14
213.65:357:13
313.65:367:12
413.65:377:11
513.65:377:10
613.55:387:09
713.55:397:08
813.55:397:07
913.45:407:07
1013.45:417:06
1113.45:417:05
1213.45:427:03
1313.35:437:02
1413.35:447:01
1513.35:447:00
1613.25:456:59
1713.25:466:58
1813.25:466:57
1913.15:476:56
2013.15:486:55
2113.15:496:53
2213.05:496:52
2313.05:506:51
2413.05:516:50
2513.05:516:48
2612.95:526:47
2712.95:536:46
2812.95:536:45
2912.85:546:43
3012.85:556:42
3112.85:556:41

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 4.86 kWh/m².

For context, solar energy here swings from a low near 2.22 kWh/m² to a high of 5.2 kWh/m² in May across the year — August's 4.86 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.2Bright
25.2Bright
35.2Bright
45.2Bright
55.1Bright
65.1Bright
75.1Bright
85.1Bright
95.0Bright
105.0Bright
115.0Bright
125.0Bright
134.9Bright
144.9Bright
154.9Bright
164.8Bright
174.8Bright
184.8Bright
194.8Bright
204.7Bright
214.7Bright
224.7Bright
234.7Bright
244.6Bright
254.6Bright
264.6Bright
274.6Bright
284.5Bright
294.5Bright
304.5Bright
314.5Bright
Planning a trip in August

Hazard calendar for Miyama

In seasonPeak

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

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

Miyama'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 Miyama?

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

4.2
Sightseeing
9th-best month of the year
6.2
Beach & pool
2nd-best month of the year

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

What to pack for Miyama in August

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

In August, Miyama sees daytime highs around 31°C and nights near 25°C. Pack light clothes. Worth having: rain gear and sun protection. About 13 days see rain.

light clothesrain gearsun protection

Sea temperature near Miyama 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 13°C.

It's comfortable for a long swim from May 27 to Nov 12 — about 5.6 months when the water holds above 20°C.

10°15°20°25°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan14Bracing
Feb13Bracing
Mar14Bracing
Apr16Cool
May19Cool
Jun22Refreshing
Jul25Warm
Aug27Warm
Sep26Warm
Oct23Refreshing
Nov20Cool
Dec17Cool

UV index in Miyama 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 Miyama peaks around July 18 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 11 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highModerateJul 18UV 10Dec 22UV 3
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar6High
Apr8Very high
May8Very high
Jun8Very high
Jul10Very high
Aug9Very high
Sep9Very high
Oct7High
Nov4Moderate
Dec3Moderate

Air quality in Miyama 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 Miyama 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 Miyama?

Miyama sits at 33.1°N, 130.5°E, 9 m above sea level, in Japan. The nearest listed city is Setakamachi-takayanagi, 4.0 km away.

Topography around Miyama

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

Within 3 km, the terrain around Miyama has only modest variations in elevation — a maximum elevation change of 221 m around an average of 44 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 502 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,765 m.

The land around Miyama is covered by trees (45%) and cropland (35%) within 3 km, trees (43%) and cropland (23%) within 16 km, and trees (57%) and water (23%) within 80 km.

3 km
221 m
16 km
502 m
80 km
1,765 m
treesgrasslandcroplandartificial surfaceswater
August weather nearby: Setakamachi-takayanagi 4.0 km · Chikugo 9.0 km · Yanagawa 11 km · Ōmuta 11 km · Hirokawa 14 km · Ōkawa 15 km · Arao 17 km · Yame 18 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 Miyama (33.121°, 130.5001°, elevation 9 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).