Yanai weather in June

In June, Yanai sees average daytime highs of 23°C and overnight lows near 20°C, with 253 mm of rain across 13.5 wet days and about 14.2 hours of daylight. It is the 4th-warmest and 1st-wettest month of the year here.

Highs climb over the month, from about 22°C in the first days to 25°C by the end. The sky is clear or mostly clear about 17% of the time in June, and the air most often feels muggy.

Daylight stretches from about 14 h 06 min at the start of June to 14 h 12 min by month's end. Set against the rest of the year, June is Yanai's 12th-clearest and 12th-windiest month. For the whole year in context, see Yanai's year-round climate.

Daytime high
23°
4th warmest
Overnight low
20°
9th coldest
Rainfall
253 mm
13.5 wet days
Daylight
14 h 12 min
5:04 AM – 7:19 PM
Cloud cover
76%
12th clearest
Wind
10 km/h
12th windiest
Solar energy
4.84 kWh/m²
Travel score
6.0
out of 10

Yanai is city in Yamaguchi Prefecture, Japan.

Density
232/km²
people per km²
Founded
2005

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

Temperature in June

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 22°C in the first days to 25°C by the end.

A typical June day in Yanai reaches about 23°C in the afternoon and slips back to 20°C overnight — a 3°C spread between the day's warmth and the night's chill. On most days the high lands between 21°C and 25°C. Set against its neighbours, June runs about 3°C warmer than May and about 4°C cooler than July.

15°20°25°30°151015202530
Avg high (°C)Avg low (°C)
12218
22218
32218
42219
52219
62219
72319
82319
92319
102319
112320
122320
132320
142320
152320
162320
172420
182420
192421
202421
212421
222421
232421
242421
252421
262522
272522
282522
292522
302522

How June really feels in Yanai

Once humidity and wind are folded in, June 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

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

Yanai weather by month

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

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / 588.10.8101.9
Feb10° / 748.80.810.72.1
Mar12° / 1229.90.111.73.4
Apr16° / 12°1469.9012.85.2
May20° / 16°16710013.76.3
Jun23° / 20°25313.5014.26.0
Jul27° / 24°23913.80145.6
Aug29° / 25°14311.5013.35.5
Sep26° / 22°16911.2012.26.5
Oct22° / 17°1207.7011.17.1
Nov17° / 12°767.8010.25.7
Dec12° / 6890.29.83.2

Cloud cover in June

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 17% of the time in June, the cloudiest month of the year.

Beyond those clear spells, partly cloudy skies cover about 9% of June, with mostly cloudy or overcast conditions the remaining 74%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
13862
23763
33664
43466
53466
63466
73268
83268
93268
103070
113070
122872
132872
142773
152575
162476
172476
182278
192278
202179
212179
222080
231981
241981
251981
261981
271981
281981
291981
301981

Chance of precipitation in June

Any precipitation

Yanai gets around 253 mm of rain over 13.5 wet days in June, the wettest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 45% and peaks near 58% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
133
233
334
434
535
635
736
836
937
1038
1139
1240
1341
1442
1544
1645
1746
1847
1949
2050
2151
2253
2354
2455
2556
2657
2757
2858
2958
3057

Humidity in June

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, June lands in the muggy band about 40% of days. Sticky, muggy-or-worse air turns up on roughly 56% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1629501500
2526521700
3524511910
4422522110
5320532310
6218532520
7216532720
8114523030
9113513230
10111503440
1109493750
1208474050
1307454260
1406424470
1505404780
16043748100
17043550120
18033251140
19032952160
20032751190
21022453210
22022153240
23021951280
24011652310
25011451340
26011249370
27011147410
2801945441
2901843471
3001741501

Wind in June

Winds average 10 km/h in June, the calmest month.

Across June, daily wind ranges from about 10 km/h on the calmest days to 11 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
111calm
211calm
310calm
410calm
510calm
610calm
710calm
810calm
910calm
1010calm
1110calm
1210calm
1310calm
1410calm
1510calm
1610calm
1710calm
1810calm
1910calm
2010calm
2111calm
2211calm
2311calm
2411calm
2511calm
2611calm
2711calm
2811calm
2911calm
3011calm

Sunrise & sunset in June

DaylightNight

Daylight runs from about 14 h 06 min at the start of June to 14 h 12 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 6 minutes over June. Sunrise moves from 5:06 AM to 5:07 AM, and sunset from 7:12 PM to 7:22 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
114.15:067:12
214.15:067:12
314.15:067:13
414.15:057:14
514.15:057:14
614.25:057:15
714.25:057:15
814.25:057:16
914.25:057:16
1014.25:047:17
1114.25:047:17
1214.25:047:18
1314.25:047:18
1414.25:047:18
1514.25:047:19
1614.25:047:19
1714.35:047:20
1814.35:047:20
1914.35:057:20
2014.35:057:20
2114.35:057:21
2214.35:057:21
2314.35:057:21
2414.35:067:21
2514.35:067:22
2614.35:067:22
2714.35:067:22
2814.35:077:22
2914.25:077:22
3014.25:077:22

Solar energy in June

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in June, about 4.84 kWh/m².

For context, solar energy here swings from a low near 2.33 kWh/m² to a high of 5.51 kWh/m² in May across the year — June's 4.84 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.4Bright
25.4Bright
35.4Bright
45.3Bright
55.3Bright
65.3Bright
75.2Bright
85.2Bright
95.2Bright
105.1Bright
115.1Bright
125.0Bright
135.0Bright
144.9Bright
154.9Bright
164.8Bright
174.8Bright
184.7Bright
194.7Bright
204.6Bright
214.6Bright
224.5Bright
234.5Bright
244.5Bright
254.4Bright
264.4Bright
274.4Bright
284.4Bright
294.4Bright
304.4Bright
Planning a trip in June

Hazard calendar for Yanai

In seasonPeak

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

Yanai 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 June a good time to visit Yanai?

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

6.0
Sightseeing
4th-best month of the year
4.8
Beach & pool
4th-best month of the year

June is a reasonable time to visit Yanai for sightseeing.

What to pack for Yanai in June

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

In June, Yanai sees daytime highs around 23°C and nights near 20°C. Pack rain gear. Worth having: light clothes and sun protection. About 14 days see rain.

rain gearlight clothessun protection

Sea temperature near Yanai in June

The nearest coast averages about 21°C in June — 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 27°C and coldest in February near 13°C.

It's comfortable for a long swim from Jun 9 to Nov 16 — about 5.3 months when the water holds above 20°C.

10°15°20°25°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan14Bracing
Feb13Bracing
Mar13Bracing
Apr15Bracing
May17Cool
Jun21Refreshing
Jul25Warm
Aug27Warm
Sep25Warm
Oct23Refreshing
Nov20Refreshing
Dec17Cool

UV index in Yanai in June

LowModerateHighVery highExtreme

Clear-sky midday UV in June 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 Yanai peaks around June 23 at about 10 (very high) — 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 10 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highModerateJun 23UV 10Dec 21UV 3
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar6High
Apr7Very high
May8Very high
Jun10Very high
Jul10Very high
Aug9Very high
Sep9Very high
Oct6High
Nov4Moderate
Dec3Moderate

Air quality in Yanai in June

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where June falls, not just the annual average.

Air quality in Yanai is worst in April — around 23 µg/m³ PM2.5 (moderate), about 2.0× the cleanest month (October, 11 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateModerateApr 1323 µg/m³Oct 1612 µg/m³
PM2.5 (µg/m³)Level
Jan15Moderate
Feb18Moderate
Mar23Moderate
Apr23Moderate
May22Moderate
Jun19Moderate
Jul17Moderate
Aug16Moderate
Sep13Moderate
Oct11Good
Nov13Moderate
Dec13Moderate
Location & terrain

Where is Yanai?

Yanai sits at 34.0°N, 132.1°E, 0 m above sea level, in Japan. The nearest listed city is Hikari, 15 km away.

Topography around Yanai

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

Within 3 km, the terrain around Yanai has significant variations in elevation — a maximum elevation change of 525 m around an average of 91 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 682 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,334 m.

The land around Yanai is covered by trees (59%) and artificial surfaces (23%) within 3 km, trees (56%) and water (32%) within 16 km, and trees (49%) and water (45%) within 80 km.

3 km
525 m
16 km
682 m
80 km
1,334 m
treesgrasslandcroplandartificial surfacesbare terrainwater
June weather nearby: Hikari 15 km · Kudamatsu 24 km · Iwakuni 24 km · Ōtake 28 km · Tokuyama 29 km · Shūnan 30 km · Ōno-hara 38 km · Miyajima 42 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 Yanai (33.9667°, 132.1167°, 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).