Ōhara weather in August

In August, Ōhara sees average daytime highs of 28°C and overnight lows near 25°C, with 100 mm of rain across 11 wet days and about 13.3 hours of daylight. It is the 1st-warmest and 12th-wettest month of the year here.

Day-to-day highs hold fairly steady near 28°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 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 Ōhara's 5th-clearest and 12th-windiest month. For the whole year in context, see Ōhara's year-round climate.

Daytime high
28°
1st warmest
Overnight low
25°
12th coldest
Rainfall
100 mm
11 wet days
Daylight
13 h 18 min
5:02 AM – 6:23 PM
Cloud cover
59%
5th clearest
Wind
16 km/h
12th windiest
Solar energy
5.53 kWh/m²
Travel score
6.2
out of 10

Temperature in August

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 28°C through the month.

A typical August day in Ōhara reaches about 28°C in the afternoon and slips back to 25°C overnight — a 3°C spread between the day's warmth and the night's chill. On most days the high lands between 25°C and 29°C. Set against its neighbours, August runs about 2°C warmer than July and about 2°C warmer than September.

20°23°25°28°30°151015202531
Avg high (°C)Avg low (°C)
12825
22825
32825
42825
52825
62825
72825
82825
92825
102825
112825
122825
132825
142825
152825
162825
172825
182825
192825
202825
212825
222825
232825
242825
252725
262725
272725
282725
292725
302725
312725

Ōhara weather by month

How August compares with the rest of the year at a glance. August is the 1st-warmest and 12th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan10° / 10810.79.92.5
Feb11° / 10110.610.72.4
Mar13° / 15914.611.73.2
Apr16° / 13°12612.612.94.8
May20° / 17°13811.813.85.9
Jun23° / 20°19013.514.35.8
Jul26° / 24°13311.814.16.2
Aug28° / 25°1001113.36.2
Sep25° / 23°18814.712.25.9
Oct21° / 19°23914.911.15.8
Nov17° / 14°14713.410.15.2
Dec13° / 10611.79.73.6

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 53%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14357
24357
34357
44456
54555
64555
74555
84654
94654
104753
114753
124753
134852
144852
154951
164951
174951
184951
194951
204951
214951
224951
234852
244951
254852
264852
274852
284951
294951
304852
314852

Chance of precipitation in August

Any precipitation

Ōhara gets around 100 mm of rain over 11 wet days in August, the driest month. 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 45% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%151015202531
Rain chance (%)
130
230
330
430
531
631
731
832
932
1033
1133
1234
1335
1435
1536
1637
1737
1838
1938
2038
2139
2239
2340
2441
2541
2642
2743
2843
2944
3044
3145

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 47% of days. Sticky, muggy-or-worse air turns up on roughly 97% of them.

0%25%50%75%100%151015202531
Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1284050
2283951
3273952
4273853
5273853
6283753
7283753
8283753
9183754
10283753
11283753
12293752
13293752
14293851
15293851
16293950
17294049
18394048
19394147
20394246
21394344
223104443
233104442
243104541
253114640
263124638
273124737
283134736
293144835
303154833
313164832

Wind in August

Winds average 16 km/h in August, the calmest month.

Across August, daily wind ranges from about 16 km/h on the calmest days to 17 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
116light breeze
216light breeze
316light breeze
416light breeze
516light breeze
616light breeze
717light breeze
817light breeze
917light breeze
1017light breeze
1117light breeze
1217light breeze
1317light breeze
1417light breeze
1517light breeze
1617light breeze
1717light breeze
1817light breeze
1917light breeze
2017light breeze
2117light breeze
2216light breeze
2316light breeze
2416light breeze
2516light breeze
2616light breeze
2716light breeze
2817light breeze
2917light breeze
3017light breeze
3117light 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 4:51 AM to 5:14 AM, and sunset from 6:38 PM to 6:03 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.84:516:38
213.84:516:37
313.74:526:37
413.74:536:36
513.74:546:35
613.74:556:34
713.64:556:33
813.64:566:32
913.64:576:31
1013.54:586:30
1113.54:586:28
1213.54:596:27
1313.45:006:26
1413.45:016:25
1513.45:026:24
1613.35:026:23
1713.35:036:21
1813.35:046:20
1913.25:056:19
2013.25:056:18
2113.25:066:16
2213.15:076:15
2313.15:086:14
2413.15:096:13
2513.05:096:11
2613.05:106:10
2713.05:116:09
2812.95:126:07
2912.95:126:06
3012.95:136:04
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 5.53 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 2.25 kWh/m² to a high of 5.53 kWh/m² in August across the year — August's 5.53 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.8Bright
25.8Bright
35.8Bright
45.8Bright
55.8Bright
65.8Bright
75.8Bright
85.7Bright
95.7Bright
105.7Bright
115.7Bright
125.6Bright
135.6Bright
145.6Bright
155.5Bright
165.5Bright
175.5Bright
185.5Bright
195.4Bright
205.4Bright
215.4Bright
225.3Bright
235.3Bright
245.3Bright
255.2Bright
265.2Bright
275.2Bright
285.1Bright
295.1Bright
305.0Bright
315.0Bright
Planning a trip in August

Hazard calendar for Ōhara

In seasonPeak

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

Ōhara 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 Ōhara?

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

6.2
Sightseeing
1st-best month of the year
6.5
Beach & pool
1st-best month of the year

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

What to pack for Ōhara in August

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

In August, Ōhara sees daytime highs around 28°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 Ōhara in August

The nearest coast averages about 26°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 14 km away) is warmest in August at about 26°C and coldest in February near 16°C.

It's comfortable for a long swim from May 22 to Dec 9 — about 6.6 months when the water holds above 20°C.

15°20°25°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan18Cool
Feb16Cool
Mar16Cool
Apr18Cool
May20Cool
Jun22Refreshing
Jul24Refreshing
Aug26Warm
Sep26Warm
Oct24Refreshing
Nov22Refreshing
Dec20Cool

UV index in Ōhara 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 Ōhara peaks around August 11 at about 10 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 23 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 highExtremeVery highHighModerateAug 11UV 10Dec 23UV 2
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar5Moderate
Apr7High
May9Very high
Jun9Very high
Jul10Extreme
Aug10Extreme
Sep8Very high
Oct6High
Nov4Moderate
Dec2Moderate

Air quality in Ōhara 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 Ōhara 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 Ōhara?

Ōhara sits at 35.2°N, 140.4°E, 9 m above sea level, in Japan. The nearest listed city is Isumi, 2.0 km away.

Topography around Ōhara

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

Within 3 km, the terrain around Ōhara has only modest variations in elevation — a maximum elevation change of 98 m around an average of 20 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 240 m; within 80 km, significant variations in elevation — a maximum elevation change of 396 m.

The land around Ōhara is covered by trees (40%) and water (35%) within 3 km, water (56%) and trees (31%) within 16 km, and water (54%) and trees (21%) within 80 km.

3 km
98 m
16 km
240 m
80 km
396 m
treesgrasslandcroplandartificial surfacesbare terrainwater
August weather nearby: Isumi 2.0 km · Katsuura 13 km · Mobara 22 km · Ōamishirasato 30 km · Ōami 31 km · Kamogawa 31 km · Tōgane 34 km · Sodegaura 38 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 Ōhara (35.2476°, 140.3929°, 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).