Yoichi weather in August

In August, Yoichi sees average daytime highs of 23°C and overnight lows near 19°C, with 145 mm of rain across 13.2 wet days and about 13.8 hours of daylight. It is the 1st-warmest and 1st-wettest month of the year here.

Day-to-day highs hold fairly steady near 23°C through the month. The sky is clear or mostly clear about 22% of the time in August, and the air most often feels muggy.

Daylight stretches from about 14 h 24 min at the start of August to 13 h 06 min by month's end. Set against the rest of the year, August is Yoichi's 7th-clearest and 10th-windiest month. For the whole year in context, see Yoichi's year-round climate.

Daytime high
23°
1st warmest
Overnight low
19°
12th coldest
Rainfall
145 mm
13.2 wet days
Daylight
13 h 48 min
4:47 AM – 6:35 PM
Cloud cover
67%
7th clearest
Wind
10 km/h
10th windiest
Solar energy
4.68 kWh/m²
Travel score
6.2
out of 10

Yoichi is town in Yoichi district, Hokkaidō, Japan.

Density
135/km²
people per km²
Founded
1900

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 23°C through the month.

A typical August day in Yoichi reaches about 23°C in the afternoon and slips back to 19°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between 20°C and 26°C. Set against its neighbours, August runs about 2°C warmer than July and about 3°C warmer than September.

15°20°25°30°151015202531
Avg high (°C)Avg low (°C)
12319
22419
32419
42419
52419
62419
72419
82419
92419
102419
112419
122419
132419
142419
152319
162319
172319
182319
192319
202319
212319
222319
232319
242318
252318
262318
272318
282318
292318
302318
312318

How August really feels in Yoichi

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.

Yoichi weather by month

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

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan-2° / -6°10321.524.59.20.0
Feb-1° / -5°8318.520.310.20.0
Mar / -3°7415.115.211.60.0
Apr / 6411.24.313.21.0
May13° / 7911.40.314.43.6
Jun18° / 12°679.6015.15.6
Jul22° / 17°11311.6014.96.2
Aug23° / 19°14513.2013.86.2
Sep20° / 15°13913.8012.35.7
Oct14° / 11314.80.510.83.7
Nov / 12718.410.99.50.7
Dec / -4°12722.322.68.90.0

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 22% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 14% of August, with mostly cloudy or overcast conditions the remaining 64%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13565
23565
33664
43565
53565
63565
73565
83565
93664
103664
113565
123565
133664
143565
153565
163565
173565
183664
193664
203664
213664
223763
233862
243862
253862
264060
274060
284060
294060
304060
314159

Chance of precipitation in August

Any precipitation

Yoichi gets around 145 mm of rain over 13.2 wet days in August, the wettest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 43% and peaks near 45% on the wettest days.

0%20%40%60%151015202531
Rain chance (%)
139
240
340
441
541
642
742
843
943
1043
1144
1244
1344
1445
1545
1645
1745
1845
1944
2044
2144
2243
2343
2443
2542
2642
2742
2842
2942
3042
3143

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

Most of August feels muggy — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, August lands in the muggy band about 37% of days. Sticky, muggy-or-worse air turns up on roughly 47% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1212304413
2212304413
3212294414
4211294414
5211294415
6211294415
7211294314
8211304314
9211314314
10211314213
11211324213
12211334112
13211344112
14211354011
15211364011
16312373910
1731237389
1831338379
1931438368
2031539358
2141639347
2241739337
2341839336
2441939326
2552039316
2652139305
2752238295
2862338285
2962538274
3072637264
3172737254

Wind in August

Winds average 10 km/h in August.

Across August, daily wind ranges from about 9 km/h on the calmest days to 11 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
1510calm
1610calm
1710calm
1810calm
1910calm
2010calm
2110calm
2210calm
2310calm
2410calm
2510calm
2610calm
2710calm
2810calm
2911calm
3011calm
3111calm

Sunrise & sunset in August

DaylightNight

Daylight runs from about 14 h 24 min at the start of August to 13 h 06 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 78 minutes over August. Sunrise moves from 4:31 AM to 5:04 AM, and sunset from 6:55 PM to 6:10 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.44:316:55
214.44:326:54
314.34:336:53
414.34:346:51
514.24:356:50
614.24:366:49
714.24:376:48
814.14:386:46
914.14:406:45
1014.04:416:43
1114.04:426:42
1214.04:436:41
1313.94:446:39
1413.94:456:38
1513.84:466:36
1613.84:476:35
1713.74:496:33
1813.74:506:31
1913.74:516:30
2013.64:526:28
2113.64:536:27
2213.54:546:25
2313.54:556:23
2413.44:566:22
2513.44:586:20
2613.34:596:18
2713.35:006:17
2813.25:016:15
2913.25:026:13
3013.15:036:11
3113.15:046:10

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 4.68 kWh/m².

For context, solar energy here swings from a low near 1.37 kWh/m² to a high of 5.69 kWh/m² in June across the year — August's 4.68 kWh/m² falls in the middle.

024151015202531
Solar energy (kWh/m²)Level
15.0Bright
25.0Bright
34.9Bright
44.9Bright
54.9Bright
64.9Bright
74.8Bright
84.8Bright
94.8Bright
104.8Bright
114.8Bright
124.7Bright
134.7Bright
144.7Bright
154.7Bright
164.6Bright
174.6Bright
184.6Bright
194.6Bright
204.6Bright
214.6Bright
224.5Bright
234.5Bright
244.5Bright
254.5Bright
264.5Bright
274.5Bright
284.5Bright
294.4Bright
304.4Bright
314.4Bright
Planning a trip in August

Hazard calendar for Yoichi

In seasonPeak

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

Yoichi 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 Yoichi?

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
5.0
Beach & pool
1st-best month of the year

August is a reasonable time to visit Yoichi for sightseeing.

What to pack for Yoichi in August

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

In August, Yoichi sees daytime highs around 23°C and nights near 19°C. Worth packing: light clothes, rain gear and sun protection. About 13 days see rain.

light clothesrain gearsun protection

Sea temperature near Yoichi in August

The nearest coast averages about 21°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 21°C and coldest in February near 6°C.

It's comfortable for a long swim from Aug 1 to Sep 23 — about 1.8 months when the water holds above 20°C.

10°20°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmcomfortable to swim
Sea temperature (°C)Comfort
Jan7Bracing
Feb6Bracing
Mar6Bracing
Apr7Bracing
May10Bracing
Jun14Bracing
Jul19Cool
Aug21Refreshing
Sep21Refreshing
Oct17Cool
Nov13Bracing
Dec9Bracing

UV index in Yoichi 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 Yoichi peaks around August 18 at about 8 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 21 at about 1 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighHighVery highHighModerateLowAug 18UV 8Dec 21UV 1
UV index (midday)Level
Jan1Low
Feb2Moderate
Mar3Moderate
Apr5High
May7Very high
Jun7High
Jul5Moderate
Aug9Very high
Sep6High
Oct4Moderate
Nov2Low
Dec1Low

Air quality in Yoichi 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 Yoichi is worst in April — around 21 µg/m³ PM2.5 (moderate), about 2.3× the cleanest month (December, 9 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodApr 1121 µg/m³Dec 169 µg/m³
PM2.5 (µg/m³)Level
Jan11Good
Feb15Moderate
Mar21Moderate
Apr21Moderate
May19Moderate
Jun13Moderate
Jul12Moderate
Aug11Good
Sep10Good
Oct12Good
Nov11Good
Dec9Good
Location & terrain

Where is Yoichi?

Yoichi sits at 43.2°N, 140.8°E, 2 m above sea level, in Japan. The nearest listed city is Otaru, 19 km away.

Topography around Yoichi

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

Within 3 km, the terrain around Yoichi has significant variations in elevation — a maximum elevation change of 280 m around an average of 47 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 873 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,867 m.

The land around Yoichi is covered by trees (46%) and water (31%) within 3 km, trees (56%) and water (37%) within 16 km, and trees (44%) and water (44%) within 80 km.

3 km
280 m
16 km
873 m
80 km
1,867 m
treesgrasslandcroplandartificial surfaceswater
August weather nearby: Otaru 19 km · Kutchan 34 km · Niseko 44 km · Ishikari 47 km · Sapporo 49 km · Tōbetsu 61 km · Ebetsu 64 km · Kitahiroshima 70 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 Yoichi (43.2039°, 140.7703°, elevation 2 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).