Ōami weather in August

In August, Ōami sees average daytime highs of 30°C and overnight lows near 25°C, with 102 mm of rain across 11.3 wet days and about 13.3 hours of daylight. It is the 1st-warmest and 9th-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 28% 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 Ōami's 7th-clearest and 10th-windiest month. For the whole year in context, see Ōami's year-round climate.

Daytime high
30°
1st warmest
Overnight low
25°
12th coldest
Rainfall
102 mm
11.3 wet days
Daylight
13 h 24 min
5:02 AM – 6:23 PM
Cloud cover
62%
7th clearest
Wind
12 km/h
10th windiest
Solar energy
5.27 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 Ōami 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 26°C and 32°C. Set against its neighbours, August runs about 1°C warmer than July and about 3°C warmer than September.

20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
13025
23025
33025
43025
53025
63025
73025
83025
93025
103025
113025
123025
133025
143025
153025
163025
173025
183025
193025
203025
212924
222924
232924
242924
252924
262924
272924
282924
292924
302924
312924

How August really feels in Ōami

Once humidity and wind are folded in, August averages 28 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
28
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.

Ōami weather by month

How August compares with the rest of the year at a glance. August is the 1st-warmest and 9th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / 838.10.69.92.2
Feb10° / 788.80.810.72.3
Mar13° / 13513.10.411.73.3
Apr17° / 11°11512.5012.95.1
May21° / 16°12711.2013.86.2
Jun24° / 20°16613.2014.45.9
Jul28° / 23°13512.6014.25.4
Aug30° / 25°10211.3013.35.0
Sep26° / 22°17514.3012.25.7
Oct21° / 17°21913.6011.16.0
Nov17° / 12°11211010.15.2
Dec12° / 758.509.63.4

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 28% 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 56%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14060
24258
34258
44357
54357
64357
74456
84456
94555
104456
114456
124555
134456
144456
154456
164555
174555
184555
194555
204555
214555
224555
234555
244456
254456
264456
274456
284456
294456
304456
314357

Chance of precipitation in August

Any precipitation

Ōami gets around 102 mm of rain over 11.3 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 37% and peaks near 44% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%50%151015202531
Rain chance (%)
133
233
333
433
533
633
733
833
934
1034
1134
1235
1335
1436
1536
1637
1737
1837
1938
2038
2139
2239
2340
2440
2541
2641
2742
2842
2943
3044
3144

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 49% of days. Sticky, muggy-or-worse air turns up on roughly 96% of them.

0%25%50%75%100%151015202531
Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
103104838
203104839
30394840
40394840
50394840
60394740
70394740
80394740
903104740
1003104740
1103104839
1203104839
1303114838
1403114838
1513114837
1613124836
1713124936
1813124935
1914134934
2014134933
2114145032
2214145031
2314155030
2414155129
2514165227
2614175226
2714185225
2814195224
2915205222
3015215221
3105225320

Wind in August

Winds average 12 km/h in August.

Across August, daily wind ranges from about 12 km/h on the calmest days to 12 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
112light breeze
212light breeze
312light breeze
412light breeze
512light breeze
612light breeze
712light breeze
812light breeze
912light breeze
1012light breeze
1112light breeze
1212light breeze
1312light breeze
1412light breeze
1512light breeze
1612light breeze
1712light breeze
1812light breeze
1912light breeze
2012light breeze
2112light breeze
2212light breeze
2312light breeze
2412light breeze
2512light breeze
2612light breeze
2712light breeze
2812light breeze
2912light breeze
3012light breeze
3112light breeze

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 4:50 AM to 5:14 AM, and sunset from 6:39 PM to 6:03 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.84:506:39
213.84:516:38
313.84:526:37
413.74:536:36
513.74:546:35
613.74:546:34
713.64:556:33
813.64:566:32
913.64:576:31
1013.54:576:30
1113.54:586:29
1213.54:596:28
1313.55:006:27
1413.45:016:26
1513.45:016:25
1613.45:026:23
1713.35:036:22
1813.35:046:21
1913.35:056:20
2013.25:056:18
2113.25:066:17
2213.15:076:16
2313.15:086:15
2413.15:096:13
2513.05:096:12
2613.05:106:10
2713.05:116:09
2812.95:126:08
2912.95:136:06
3012.95:136:05
3112.85:146:03

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 5.27 kWh/m².

For context, solar energy here swings from a low near 2.28 kWh/m² to a high of 5.35 kWh/m² in May across the year — August's 5.27 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.5Bright
25.5Bright
35.5Bright
45.5Bright
55.5Bright
65.5Bright
75.5Bright
85.5Bright
95.5Bright
105.4Bright
115.4Bright
125.4Bright
135.4Bright
145.3Bright
155.3Bright
165.3Bright
175.2Bright
185.2Bright
195.2Bright
205.1Bright
215.1Bright
225.1Bright
235.0Bright
245.0Bright
255.0Bright
264.9Bright
274.9Bright
284.8Bright
294.8Bright
304.8Bright
314.7Bright
Planning a trip in August

Hazard calendar for Ōami

In seasonPeak

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

Ōami 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 Ōami?

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
6.6
Beach & pool
1st-best month of the year

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

What to pack for Ōami in August

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

In August, Ōami sees daytime highs around 30°C and nights near 25°C. Pack light clothes. Worth having: rain gear and sun protection. About 11 days see rain.

light clothesrain gearsun protection

Sea temperature near Ōami in August

The nearest coast averages about 25°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 30 km away) is warmest in August at about 25°C and coldest in February near 15°C.

It's comfortable for a long swim from Jun 5 to Nov 22 — about 5.6 months when the water holds above 20°C.

15°20°25°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmcomfortable to swim
Sea temperature (°C)Comfort
Jan16Cool
Feb15Bracing
Mar15Cool
Apr16Cool
May19Cool
Jun21Refreshing
Jul23Refreshing
Aug25Warm
Sep25Warm
Oct23Refreshing
Nov21Refreshing
Dec18Cool

UV index in Ōami in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August peaks around 10 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Ōami peaks around August 12 at about 10 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near January 1 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 highVery highModerateAug 12UV 10Jan 1UV 2
UV index (midday)Level
Jan2Moderate
Feb4Moderate
Mar4Moderate
Apr7High
May8Very high
Jun9Very high
Jul10Very high
Aug10Extreme
Sep8Very high
Oct6High
Nov3Moderate
Dec2Moderate

Air quality in Ōami 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 Ōami is worst in April — around 22 µg/m³ PM2.5 (moderate), about 1.9× the cleanest month (September, 11 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModerateApr 1322 µg/m³Sep 911 µg/m³
PM2.5 (µg/m³)Level
Jan14Moderate
Feb17Moderate
Mar21Moderate
Apr22Moderate
May21Moderate
Jun16Moderate
Jul12Good
Aug11Good
Sep11Good
Oct14Moderate
Nov14Moderate
Dec13Moderate
Location & terrain

Where is Ōami?

Ōami sits at 35.5°N, 140.3°E, 8 m above sea level, in Japan. The nearest listed city is Ōamishirasato, 3.0 km away.

Topography around Ōami

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

Within 3 km, the terrain around Ōami has only modest variations in elevation — a maximum elevation change of 108 m around an average of 19 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 186 m; within 80 km, large variations in elevation — a maximum elevation change of 755 m.

The land around Ōami is covered by cropland (38%), trees (35%) and artificial surfaces (23%) within 3 km, trees (41%) and cropland (24%) within 16 km, and water (43%), trees (22%) and artificial surfaces (21%) within 80 km.

3 km
108 m
16 km
186 m
80 km
755 m
treesgrasslandcroplandartificial surfacesbare terrainwater
August weather nearby: Ōamishirasato 3.0 km · Tōgane 6.0 km · Mobara 10 km · Narutō 13 km · Yachimata 15 km · Sanmu 15 km · Yotsukaidō 20 km · Chiba 20 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 Ōami (35.5167°, 140.3167°, elevation 8 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).