Uki weather in August

In August, Uki sees average daytime highs of 29°C and overnight lows near 23°C, with 171 mm of rain across 16.9 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 29°C through the month. The sky is clear or mostly clear about 23% of the time in August, and the air most often feels oppressive.

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 Uki's 9th-clearest and 10th-windiest month. For the whole year in context, see Uki's year-round climate.

Daytime high
29°
1st warmest
Overnight low
23°
12th coldest
Rainfall
171 mm
16.9 wet days
Daylight
13 h 12 min
5:45 AM – 6:58 PM
Cloud cover
65%
9th clearest
Wind
7 km/h
10th windiest
Solar energy
4.79 kWh/m²
Travel score
4.5
out of 10

Temperature in August

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 29°C through the month.

A typical August day in Uki reaches about 29°C in the afternoon and slips back to 23°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 26°C and 31°C. Set against its neighbours, August runs about 1°C warmer than July and about 3°C warmer than September.

15°20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
12924
23024
33024
43024
53024
63024
73024
83024
93024
102924
112924
122924
132924
142923
152923
162923
172923
182923
192923
202923
212923
222923
232923
242923
252923
262923
272923
282822
292822
302822
312822

How August really feels in Uki

Once humidity and wind are folded in, August averages 18 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
18
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.

Uki 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 daysSnow daysDaylight (hours)Travel score
Jan / 8210.53.210.11.3
Feb / 10210.52.210.81.9
Mar13° / 15113.60.611.83.4
Apr18° / 10°17012.3012.85.3
May22° / 15°19312.5013.76.1
Jun24° / 19°46419.1014.15.1
Jul28° / 23°35819.8013.94.5
Aug29° / 23°17116.9013.24.5
Sep26° / 20°18314.3012.25.9
Oct22° / 14°1089011.26.9
Nov16° / 988.8010.35.2
Dec10° / 86101.49.92.5

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 23% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 19% of August, with mostly cloudy or overcast conditions the remaining 58%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14654
24654
34555
44456
54456
64357
74357
84258
94258
104258
114258
124159
134159
144060
154159
164159
174159
184159
194159
204258
214258
224258
234258
244258
254258
264258
274159
284159
294060
304060
314060

Chance of precipitation in August

Any precipitation

Uki gets around 171 mm of rain over 16.9 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 55% and peaks near 57% on the wettest days.

0%20%40%60%151015202531
Rain chance (%)
156
255
355
454
554
653
753
852
952
1052
1152
1253
1353
1453
1554
1654
1755
1855
1955
2056
2156
2256
2356
2456
2556
2656
2756
2857
2956
3056
3156

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 74% of days. Sticky, muggy-or-worse air turns up on roughly 97% of them.

0%25%50%75%100%151015202531
Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1013843
2013843
3012853
4012853
5012853
6013843
7013843
8013843
9014833
10014833
11015823
12015823
13116803
14117793
15117793
16118783
17119773
18220753
19221743
20322732
21323722
22424702
23425692
24526672
25528661
26629641
27730621
28831601
29832591
30934561
311035541

Wind in August

Winds average 7 km/h in August.

Across August, daily wind ranges from about 7 km/h on the calmest days to 7 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
17calm
27calm
37calm
47calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm
317calm

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 5:35 AM to 5:55 AM, and sunset from 7:12 PM to 6:40 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.65:357:12
213.65:357:11
313.65:367:10
413.55:377:10
513.55:377:09
613.55:387:08
713.55:397:07
813.45:407:06
913.45:407:05
1013.45:417:04
1113.45:427:03
1213.35:427:02
1313.35:437:01
1413.35:447:00
1513.25:446:59
1613.25:456:58
1713.25:466:57
1813.25:466:56
1913.15:476:54
2013.15:486:53
2113.15:496:52
2213.05:496:51
2313.05:506:50
2413.05:516:48
2512.95:516:47
2612.95:526:46
2712.95:536:45
2812.85:536:43
2912.85:546:42
3012.85:556:41
3112.75:556:40

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 4.79 kWh/m².

For context, solar energy here swings from a low near 2.37 kWh/m² to a high of 5.09 kWh/m² in May across the year — August's 4.79 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.1Bright
25.1Bright
35.0Bright
45.0Bright
55.0Bright
65.0Bright
75.0Bright
85.0Bright
95.0Bright
104.9Bright
114.9Bright
124.9Bright
134.8Bright
144.8Bright
154.8Bright
164.8Bright
174.8Bright
184.7Bright
194.7Bright
204.7Bright
214.7Bright
224.6Bright
234.6Bright
244.6Bright
254.6Bright
264.5Bright
274.5Bright
284.5Bright
294.4Bright
304.4Bright
314.4Bright
Planning a trip in August

Hazard calendar for Uki

In seasonPeak

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

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

Uki'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 Uki?

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

4.5
Sightseeing
7th-best month of the year
5.8
Beach & pool
1st-best month of the year

August is a reasonable time to visit Uki for sightseeing.

What to pack for Uki in August

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

In August, Uki sees daytime highs around 29°C and nights near 23°C. Pack light clothes and rain gear. Worth having: sun protection. About 17 days see rain.

light clothesrain gearsun protection

Sea temperature near Uki 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 at the nearest coast (about 27 km away) is warmest in August at about 27°C and coldest in February near 14°C.

It's comfortable for a long swim from May 26 to Nov 19 — about 5.9 months when the water holds above 20°C.

10°15°20°25°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan15Cool
Feb14Bracing
Mar15Bracing
Apr17Cool
May19Cool
Jun22Refreshing
Jul25Warm
Aug27Warm
Sep26Warm
Oct23Refreshing
Nov20Refreshing
Dec18Cool

UV index in Uki 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 Uki peaks around June 22 at about 10 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 21 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 highModerateJun 22UV 10Dec 21UV 3
UV index (midday)Level
Jan3Moderate
Feb5Moderate
Mar6High
Apr8Very high
May8Very high
Jun10Extreme
Jul10Extreme
Aug9Very high
Sep10Very high
Oct7High
Nov4Moderate
Dec3Moderate

Air quality in Uki 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 Uki is worst in March — around 24 µg/m³ PM2.5 (moderate), about 1.8× the cleanest month (July, 13 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateMar 2424 µg/m³Jul 2114 µg/m³
PM2.5 (µg/m³)Level
Jan17Moderate
Feb20Moderate
Mar24Moderate
Apr24Moderate
May22Moderate
Jun18Moderate
Jul13Moderate
Aug14Moderate
Sep14Moderate
Oct14Moderate
Nov16Moderate
Dec15Moderate
Location & terrain

Where is Uki?

Uki sits at 32.6°N, 130.7°E, 0 m above sea level, in Japan. The nearest listed city is Matsubase, 3.0 km away.

Topography around Uki

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

Within 3 km, the terrain around Uki has only modest variations in elevation — a maximum elevation change of 98 m around an average of 3 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 861 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,757 m.

The land around Uki is covered by cropland (54%) within 3 km, trees (42%), cropland (22%) and water (20%) within 16 km, and trees (65%) and water (21%) within 80 km.

3 km
98 m
16 km
861 m
80 km
1,757 m
treesgrasslandcroplandartificial surfaceswater
August weather nearby: Matsubase 3.0 km · Uto 7.0 km · Honmachi 14 km · Mifune 18 km · Kotō 19 km · Shimada 19 km · Kumamoto 21 km · Ōyanomachi-noboritate 22 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 Uki (32.6222°, 130.6618°, elevation 0 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).