Umeki weather in August

In August, Umeki sees average daytime highs of 31°C and overnight lows near 25°C, with 173 mm of rain across 17.5 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 25% of the time in August, and the air most often feels miserable.

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 Umeki's 9th-clearest and 7th-windiest month. For the whole year in context, see Umeki's year-round climate.

Daytime high
31°
1st warmest
Overnight low
25°
12th coldest
Rainfall
173 mm
17.5 wet days
Daylight
13 h 12 min
5:48 AM – 6:58 PM
Cloud cover
64%
9th clearest
Wind
9 km/h
7th windiest
Solar energy
4.9 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 Umeki 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 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)
13125
23125
33125
43126
53126
63126
73126
83126
93126
103126
113126
123126
133125
143125
153125
163125
173125
183125
193125
203125
213125
223125
233125
243125
253025
263025
273025
283025
293025
303025
313024

How August really feels in Umeki

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.

Umeki 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° / 819.610.22.9
Feb13° / 1049.710.83.3
Mar16° / 15312.911.84.5
Apr20° / 12°18211.512.85.9
May24° / 16°20511.713.66.4
Jun26° / 21°51419.4144.9
Jul30° / 25°3362013.93.9
Aug31° / 25°17317.513.23.8
Sep29° / 23°19714.512.25.2
Oct24° / 17°1088.611.27.2
Nov19° / 12°1118.710.46.3
Dec14° / 877.9104.2

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 20% of August, with mostly cloudy or overcast conditions the remaining 55%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14753
24654
34555
44555
54555
64555
74357
84357
94357
104456
114357
124357
134357
144258
154456
164456
174456
184555
194654
204753
214852
224852
234852
244753
254753
264753
274753
284753
294753
304753
314753

Chance of precipitation in August

Any precipitation

Umeki gets around 173 mm of rain over 17.5 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 57% and peaks near 60% on the wettest days.

0%20%40%60%151015202531
Rain chance (%)
154
253
353
453
553
653
754
854
955
1055
1156
1257
1358
1458
1559
1659
1760
1860
1960
2060
2159
2259
2359
2459
2559
2658
2758
2858
2958
3058
3158

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 49% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1014653
2014554
3014554
4014554
5014455
6014455
7014356
8014356
9014356
10014356
11014257
12014356
13014356
14014356
15014455
16024454
17024553
18024652
19034651
20034749
21044848
22054946
23055144
24165142
25175240
26175438
27185536
28195634
291105732
301115731
311125829

Wind in August

Winds average 9 km/h in August.

Across August, daily wind ranges from about 8 km/h on the calmest days to 9 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
19calm
29calm
39calm
49calm
59calm
69calm
79calm
89calm
99calm
109calm
119calm
129calm
139calm
149calm
159calm
169calm
179calm
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 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 5:38 AM to 5:57 AM, and sunset from 7:11 PM to 6:40 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.65:387:11
213.55:387:11
313.55:397:10
413.55:407:09
513.55:407:08
613.45:417:07
713.45:427:06
813.45:427:06
913.45:437:05
1013.35:447:04
1113.35:447:03
1213.35:457:02
1313.35:467:01
1413.25:467:00
1513.25:476:59
1613.25:486:58
1713.15:486:56
1813.15:496:55
1913.15:506:54
2013.15:506:53
2113.05:516:52
2213.05:516:51
2313.05:526:50
2412.95:536:49
2512.95:536:47
2612.95:546:46
2712.85:556:45
2812.85:556:44
2912.85:566:42
3012.75:576:41
3112.75:576:40

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 4.9 kWh/m².

For context, solar energy here swings from a low near 2.45 kWh/m² to a high of 5.04 kWh/m² in May across the year — August's 4.9 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.2Bright
25.2Bright
35.1Bright
45.1Bright
55.1Bright
65.1Bright
75.1Bright
85.1Bright
95.0Bright
105.0Bright
115.0Bright
125.0Bright
135.0Bright
144.9Bright
154.9Bright
164.9Bright
174.9Bright
184.8Bright
194.8Bright
204.8Bright
214.8Bright
224.8Bright
234.7Bright
244.7Bright
254.7Bright
264.7Bright
274.6Bright
284.6Bright
294.6Bright
304.5Bright
314.5Bright
Planning a trip in August

Hazard calendar for Umeki

In seasonPeak

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

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

Umeki'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 Umeki?

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 Umeki.

What to pack for Umeki in August

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

In August, Umeki sees daytime highs around 31°C and nights near 25°C. Pack light clothes and rain gear. Worth having: sun protection. About 18 days see rain.

light clothesrain gearsun protection

Sea temperature near Umeki 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 25 km away) is warmest in August at about 28°C and coldest in February near 17°C.

It's comfortable for a long swim from May 4 to Dec 16 — about 7.5 months when the water holds above 20°C.

15°20°25°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan18Cool
Feb17Cool
Mar18Cool
Apr19Cool
May21Refreshing
Jun23Refreshing
Jul26Warm
Aug28Tropical
Sep27Warm
Oct25Warm
Nov23Refreshing
Dec20Refreshing

UV index in Umeki 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 Umeki peaks around July 10 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 highHighModerateJul 10UV 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 Umeki 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 Umeki 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 Umeki?

Umeki sits at 31.7°N, 130.4°E, 77 m above sea level, in Japan. The nearest listed city is Ijūin, 6.0 km away.

Topography around Umeki

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

Within 3 km, the terrain around Umeki has significant variations in elevation — a maximum elevation change of 318 m around an average of 128 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 680 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,644 m.

The land around Umeki is covered by trees (82%) within 3 km, trees (68%) and water (20%) within 16 km, and water (53%) and trees (41%) within 80 km.

3 km
318 m
16 km
680 m
80 km
1,644 m
treesgrasslandcroplandartificial surfaceswater
August weather nearby: Ijūin 6.0 km · Ichikikushikino 11 km · Kushikino 12 km · Sendai 18 km · Kagoshima 19 km · Aira 23 km · Kajiki 28 km · Kaseda-shirakame 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 Umeki (31.6667°, 130.3833°, elevation 77 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).