Uchiko weather in August

In August, Uchiko sees average daytime highs of 30°C and overnight lows near 23°C, with 179 mm of rain across 17.2 wet days and about 13.2 hours of daylight. It is the 1st-warmest and 4th-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 23% of the time in August, and the air most often feels oppressive.

Daylight stretches from about 13 h 42 min at the start of August to 12 h 48 min by month's end. Set against the rest of the year, August is Uchiko's 9th-clearest and 10th-windiest month. For the whole year in context, see Uchiko's year-round climate.

Daytime high
30°
1st warmest
Overnight low
23°
12th coldest
Rainfall
179 mm
17.2 wet days
Daylight
13 h 18 min
5:36 AM – 6:51 PM
Cloud cover
64%
9th clearest
Wind
7 km/h
10th windiest
Solar energy
5.05 kWh/m²
Travel score
4.0
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 Uchiko reaches about 30°C in the afternoon and slips back to 23°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 27°C and 33°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)
13123
23123
33123
43123
53123
63123
73123
83123
93123
103123
113123
123123
133123
143123
153123
163023
173023
183023
193023
203022
213022
223022
233022
243022
253022
263022
273022
283022
292922
302921
312921

How August really feels in Uchiko

Once humidity and wind are folded in, August averages 25 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
25
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.

Uchiko weather by month

How August compares with the rest of the year at a glance. August is the 1st-warmest and 4th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -0°6710.74.7101.3
Feb / 8310.43.510.81.8
Mar13° / 12712.5111.73.5
Apr18° / 14411.30.112.85.6
May23° / 13°16911.7013.76.4
Jun25° / 18°30116.8014.25.3
Jul29° / 22°26318.20144.3
Aug30° / 23°17917.2013.24.0
Sep27° / 19°20415.1012.25.5
Oct22° / 12°1539.3011.26.9
Nov16° / 868.60.110.35.3
Dec10° / 7910.62.69.82.5

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 20% of August, with mostly cloudy or overcast conditions the remaining 57%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14357
24258
34357
44357
54357
64357
74357
84456
94357
104357
114357
124258
134258
144258
154357
164357
174357
184456
194456
204456
214555
224456
234456
244258
254258
264258
274258
284258
294357
304357
314258

Chance of precipitation in August

Any precipitation

Uchiko gets around 179 mm of rain over 17.2 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 56% and peaks near 58% on the wettest days.

0%20%40%60%151015202531
Rain chance (%)
158
258
358
458
558
657
757
857
957
1057
1157
1257
1356
1456
1556
1655
1755
1854
1954
2054
2154
2254
2354
2454
2554
2654
2754
2855
2955
3055
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 59% 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 (%)
10133642
20132652
30132652
40132652
50132652
60132652
70132652
80132652
90132652
100132652
110132652
120232642
130233632
140233632
151333612
161333612
171333612
181434601
191534591
201534591
212635561
222735551
232736541
242836531
252937511
2631038500
2731038480
2831139470
2931239450
3031340440
3141441420

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 42 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 54 minutes over August. Sunrise moves from 5:25 AM to 5:46 AM, and sunset from 7:06 PM to 6:32 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.75:257:06
213.75:267:05
313.65:267:04
413.65:277:03
513.65:287:02
613.55:297:02
713.55:297:01
813.55:307:00
913.55:316:59
1013.45:316:58
1113.45:326:57
1213.45:336:56
1313.35:346:54
1413.35:346:53
1513.35:356:52
1613.35:366:51
1713.25:376:50
1813.25:376:49
1913.25:386:48
2013.15:396:46
2113.15:396:45
2213.15:406:44
2313.05:416:43
2413.05:426:42
2513.05:426:40
2612.95:436:39
2712.95:446:38
2812.95:446:36
2912.85:456:35
3012.85:466:34
3112.85:466:32

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 5.05 kWh/m².

For context, solar energy here swings from a low near 2.48 kWh/m² to a high of 5.45 kWh/m² in May across the year — August's 5.05 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.3Bright
25.3Bright
35.3Bright
45.3Bright
55.3Bright
65.2Bright
75.2Bright
85.2Bright
95.2Bright
105.2Bright
115.2Bright
125.1Bright
135.1Bright
145.1Bright
155.1Bright
165.0Bright
175.0Bright
185.0Bright
195.0Bright
205.0Bright
214.9Bright
224.9Bright
234.9Bright
244.9Bright
254.8Bright
264.8Bright
274.8Bright
284.7Bright
294.7Bright
304.7Bright
314.6Bright
Planning a trip in August

Hazard calendar for Uchiko

In seasonPeak

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

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

Uchiko's rainy season runs April–October, 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 Uchiko?

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

4.0
Sightseeing
8th-best month of the year
5.6
Beach & pool
2nd-best month of the year

August is a reasonable time to visit Uchiko for sightseeing.

What to pack for Uchiko in August

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

In August, Uchiko sees daytime highs around 30°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 Uchiko 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 offshore is warmest in August at about 26°C and coldest in February near 14°C.

It's comfortable for a long swim from Jun 11 to Nov 19 — about 5.3 months when the water holds above 20°C.

10°15°20°25°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan15Cool
Feb14Bracing
Mar14Bracing
Apr15Cool
May17Cool
Jun21Refreshing
Jul24Warm
Aug26Warm
Sep25Warm
Oct23Refreshing
Nov20Refreshing
Dec18Cool

UV index in Uchiko 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 Uchiko peaks around June 23 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 — in 11 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highExtremeVery highModerateJun 23UV 10Dec 21UV 3
UV index (midday)Level
Jan3Moderate
Feb5Moderate
Mar6High
Apr7Very high
May9Very high
Jun10Extreme
Jul10Extreme
Aug9Very high
Sep10Very high
Oct7High
Nov4Moderate
Dec3Moderate

Air quality in Uchiko 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 Uchiko is worst in April — around 23 µg/m³ PM2.5 (moderate), about 2.2× the cleanest month (October, 11 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodApr 1523 µg/m³Oct 1711 µg/m³
PM2.5 (µg/m³)Level
Jan14Moderate
Feb17Moderate
Mar21Moderate
Apr23Moderate
May21Moderate
Jun19Moderate
Jul15Moderate
Aug15Moderate
Sep12Moderate
Oct11Good
Nov12Good
Dec11Good
Location & terrain

Where is Uchiko?

Uchiko sits at 33.5°N, 132.6°E, 61 m above sea level, in Japan. The nearest listed city is Ōzu, 11 km away.

Topography around Uchiko

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

Within 3 km, the terrain around Uchiko has significant variations in elevation — a maximum elevation change of 498 m around an average of 138 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 1,110 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,895 m.

The land around Uchiko is covered by trees (79%) within 3 km, trees (91%) within 16 km, and water (49%) and trees (47%) within 80 km.

3 km
498 m
16 km
1,110 m
80 km
1,895 m
treesgrasslandcroplandartificial surfaceswater
August weather nearby: Ōzu 11 km · Yawatahama 22 km · Iyo 23 km · Uwa 24 km · Masaki-chō 27 km · Haramachi 28 km · Matsuyama 34 km · Shinagawa 35 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 Uchiko (33.5499°, 132.6471°, elevation 61 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).