Okunoya weather in August

In August, Okunoya sees average daytime highs of 28°C and overnight lows near 23°C, with 111 mm of rain across 12.1 wet days and about 13.4 hours of daylight. It is the 1st-warmest and 8th-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 25% of the time in August, and the air most often feels oppressive.

Daylight stretches from about 13 h 54 min at the start of August to 12 h 48 min by month's end. Set against the rest of the year, August is Okunoya's 8th-clearest and 11th-windiest month. For the whole year in context, see Okunoya's year-round climate.

Daytime high
28°
1st warmest
Overnight low
23°
12th coldest
Rainfall
111 mm
12.1 wet days
Daylight
13 h 24 min
5:01 AM – 6:24 PM
Cloud cover
64%
8th clearest
Wind
12 km/h
11th windiest
Solar energy
5.04 kWh/m²
Travel score
6.0
out of 10

Okunoya is human settlement in Japan.

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

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 Okunoya reaches about 28°C in the afternoon and slips back to 23°C overnight — a 4°C spread between the day's warmth and the night's chill. On most days the high lands between 24°C and 31°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)
12823
22823
32824
42824
52824
62824
72824
82824
92824
102824
112824
122824
132824
142824
152824
162824
172824
182824
192824
202723
212723
222723
232723
242723
252723
262723
272723
282723
292723
302723
312723

How August really feels in Okunoya

Once humidity and wind are folded in, August averages 0 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
0
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

August sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Okunoya weather by month

How August compares with the rest of the year at a glance. August is the 1st-warmest and 8th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / 737.61.39.81.7
Feb / 718.11.610.61.8
Mar12° / 126130.911.72.9
Apr16° / 10°12412.40.112.94.7
May20° / 15°14812.6013.95.8
Jun23° / 18°15914.1014.45.7
Jul26° / 22°16214.9014.25.7
Aug28° / 23°11112.1013.46.0
Sep25° / 21°17614.1012.26.0
Oct20° / 16°21313.5011.15.8
Nov16° / 11°10610.5010.14.8
Dec11° / 718.60.29.62.9

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 25% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 17% of August, with mostly cloudy or overcast conditions the remaining 58%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14060
24159
34159
44258
54258
64258
74258
84258
94258
104159
114159
124258
134258
144159
154258
164159
174159
184159
194159
204258
214258
224258
234258
244357
254258
264357
274357
284357
294258
304258
314258

Chance of precipitation in August

Any precipitation

Okunoya gets around 111 mm of rain over 12.1 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 40% 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 (%)
135
235
335
435
535
636
736
837
938
1038
1139
1240
1340
1441
1541
1641
1741
1841
1941
2041
2141
2241
2341
2441
2542
2642
2742
2843
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 57% of days. Sticky, muggy-or-worse air turns up on roughly 94% of them.

0%25%50%75%100%151015202531
Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
105146417
205146318
305136319
405136220
505136220
605136121
705136121
805136022
905136022
1005145922
1105145823
1205155723
1315155623
1415165523
1515165622
1615175522
1715175522
1815185422
1915185521
2015195421
2116205320
2216215319
2316225318
2416235317
2516245316
2616255315
2716265314
2817275213
2917285212
3017295211
3118305110

Wind in August

Winds average 12 km/h in August.

Across August, daily wind ranges from about 11 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
111calm
211calm
311calm
411calm
511calm
611calm
711calm
811calm
911calm
1012calm
1112calm
1212calm
1312calm
1412calm
1512calm
1612calm
1712calm
1812calm
1912calm
2012calm
2112calm
2212calm
2312calm
2412calm
2512calm
2612calm
2712light breeze
2812light breeze
2912light breeze
3012light breeze
3112light breeze

Sunrise & sunset in August

DaylightNight

Daylight runs from about 13 h 54 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 66 minutes over August. Sunrise moves from 4:48 AM to 5:13 AM, and sunset from 6:40 PM to 6:04 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.94:486:40
213.84:496:39
313.84:506:38
413.84:516:38
513.74:526:37
613.74:526:36
713.74:536:34
813.74:546:33
913.64:556:32
1013.64:566:31
1113.64:576:30
1213.54:576:29
1313.54:586:28
1413.54:596:27
1513.45:006:25
1613.45:016:24
1713.45:026:23
1813.35:026:22
1913.35:036:20
2013.35:046:19
2113.25:056:18
2213.25:066:16
2313.15:066:15
2413.15:076:14
2513.15:086:12
2613.05:096:11
2713.05:106:10
2813.05:116:08
2912.95:116:07
3012.95:126:05
3112.85:136:04

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 5.04 kWh/m².

For context, solar energy here swings from a low near 2.35 kWh/m² to a high of 5.38 kWh/m² in May across the year — August's 5.04 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.3Bright
25.3Bright
35.3Bright
45.3Bright
55.3Bright
65.3Bright
75.3Bright
85.3Bright
95.3Bright
105.2Bright
115.2Bright
125.2Bright
135.1Bright
145.1Bright
155.1Bright
165.0Bright
175.0Bright
185.0Bright
194.9Bright
204.9Bright
214.9Bright
224.8Bright
234.8Bright
244.8Bright
254.7Bright
264.7Bright
274.7Bright
284.6Bright
294.6Bright
304.6Bright
314.5Bright
Planning a trip in August

Hazard calendar for Okunoya

In seasonPeak

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

Okunoya 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 Okunoya?

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

6.0
Sightseeing
1st-best month of the year
6.3
Beach & pool
1st-best month of the year

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

What to pack for Okunoya in August

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

In August, Okunoya sees daytime highs around 28°C and nights near 23°C. Pack light clothes. Worth having: rain gear and sun protection. About 12 days see rain.

light clothesrain gearsun protection

Sea temperature near Okunoya in August

The nearest coast averages about 24°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 21 km away) is warmest in August at about 24°C and coldest in February near 13°C.

It's comfortable for a long swim from Jun 24 to Oct 28 — about 4.2 months when the water holds above 20°C.

10°15°20°25°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmcomfortable to swim
Sea temperature (°C)Comfort
Jan15Bracing
Feb13Bracing
Mar13Bracing
Apr15Bracing
May17Cool
Jun19Cool
Jul22Refreshing
Aug24Warm
Sep23Refreshing
Oct21Refreshing
Nov19Cool
Dec16Cool

UV index in Okunoya 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 Okunoya peaks around July 24 at about 10 (very high) — 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 highModerateJul 24UV 10Jan 1UV 2
UV index (midday)Level
Jan2Moderate
Feb4Moderate
Mar4Moderate
Apr6High
May8Very high
Jun9Very high
Jul10Very high
Aug10Very high
Sep8Very high
Oct6High
Nov3Moderate
Dec2Moderate

Air quality in Okunoya 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 Okunoya is worst in March — around 25 µg/m³ PM2.5 (moderate), about 1.8× the cleanest month (December, 14 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateMar 2425 µg/m³Dec 1914 µg/m³
PM2.5 (µg/m³)Level
Jan15Moderate
Feb18Moderate
Mar25Moderate
Apr25Moderate
May24Moderate
Jun19Moderate
Jul16Moderate
Aug15Moderate
Sep15Moderate
Oct16Moderate
Nov16Moderate
Dec14Moderate
Location & terrain

Where is Okunoya?

Okunoya sits at 36.3°N, 140.4°E, 22 m above sea level, in Japan. The nearest listed city is Omitama, 5.0 km away.

Topography around Okunoya

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

Within 3 km, the terrain around Okunoya has only modest variations in elevation — a maximum elevation change of 49 m around an average of 20 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 416 m; within 80 km, large variations in elevation — a maximum elevation change of 1,005 m.

The land around Okunoya is covered by cropland (38%) and trees (35%) within 3 km, trees (37%), cropland (27%) and artificial surfaces (23%) within 16 km, and trees (36%), water (24%) and cropland (21%) within 80 km.

3 km
49 m
16 km
416 m
80 km
1,005 m
treesgrasslandcroplandartificial surfaceswater
August weather nearby: Omitama 5.0 km · Mito 8.0 km · Tomobe 13 km · Suginami 15 km · Katsuta 15 km · Ōarai 15 km · Hitachi-Naka 16 km · Hokota 17 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 Okunoya (36.2833°, 140.4167°, elevation 22 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).