Sasebo weather in June

In June, Sasebo sees average daytime highs of 26°C and overnight lows near 20°C, with 308 mm of rain across 15.7 wet days and about 14.1 hours of daylight. It is the 4th-warmest and 1st-wettest month of the year here.

Highs climb over the month, from about 25°C in the first days to 27°C by the end. The sky is clear or mostly clear about 15% of the time in June, and the air most often feels muggy.

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

Daytime high
26°
4th warmest
Overnight low
20°
9th coldest
Rainfall
308 mm
15.7 wet days
Daylight
14 h 12 min
5:16 AM – 7:27 PM
Cloud cover
78%
12th clearest
Wind
10 km/h
12th windiest
Solar energy
4.55 kWh/m²
Travel score
5.5
out of 10

Sasebo is city in Nagasaki Prefecture, Japan.

Density
571/km²
people per km²
Founded
1902

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 25°C in the first days to 27°C by the end.

A typical June day in Sasebo reaches about 26°C in the afternoon and slips back to 20°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 23°C and 29°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)
12518
22518
32518
42518
52519
62519
72519
82519
92519
102519
112519
122620
132620
142620
152620
162620
172620
182620
192621
202621
212621
222621
232621
242621
252622
262622
272722
282722
292722
302722

How June really feels in Sasebo

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.

Sasebo 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
Jan10° / 618.40.710.12.3
Feb11° / 728.40.510.82.8
Mar15° / 11810.50.111.74.3
Apr19° / 12°13810.4012.86.0
May23° / 16°14910.1013.76.7
Jun26° / 20°30815.7014.15.5
Jul29° / 24°28516.30144.4
Aug31° / 25°17814.7013.24.0
Sep28° / 22°18612.3012.25.8
Oct23° / 17°1026.9011.27.4
Nov18° / 11°908.1010.36.0
Dec12° / 697.50.19.83.5

Cloud cover in June

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 15% of the time in June, the cloudiest month of the year.

Beyond those clear spells, partly cloudy skies cover about 11% 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
23664
33565
43565
53367
63367
73367
83169
93169
103070
112971
122872
132773
142773
152476
162476
172476
182476
192179
202179
212179
222080
231882
241882
251783
261783
271783
281783
291783
301783

Chance of precipitation in June

Any precipitation

Sasebo gets around 308 mm of rain over 15.7 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 52% and peaks near 68% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%151015202530
Rain chance (%)
134
235
335
436
537
638
739
840
942
1043
1145
1246
1348
1450
1552
1654
1755
1857
1958
2060
2161
2263
2364
2465
2566
2667
2768
2868
2968
3068

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 36% of days. Sticky, muggy-or-worse air turns up on roughly 60% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
11028421820
2926432020
3824442230
4722442430
5620442640
6518442850
7417443050
8315443260
9214433370
10212423591
111114137101
121103938111
13183740131
14083641151
15073342161
16063143181
17052944202
18052744222
19042544252
20042244273
21032044303
22031843324
23031642345
24021441375
25021240397
26021039418
2701938439
28017364510
29016354712
30015334813

Wind in June

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

Across June, daily wind ranges from about 9 km/h on the calmest days to 12 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
19calm
29calm
39calm
49calm
59calm
69calm
79calm
89calm
99calm
109calm
119calm
1210calm
1310calm
1410calm
1510calm
1610calm
1710calm
1810calm
1910calm
2010calm
2110calm
2211calm
2311calm
2411calm
2511calm
2611calm
2711calm
2812calm
2912calm
3012calm

Sunrise & sunset in June

DaylightNight

Daylight runs from about 14 hours 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 12 minutes over June. Sunrise moves from 5:18 AM to 5:19 AM, and sunset from 7:19 PM to 7:29 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
114.05:187:19
214.05:187:20
314.15:177:21
414.15:177:21
514.15:177:22
614.15:177:22
714.15:167:23
814.15:167:23
914.15:167:24
1014.15:167:24
1114.15:167:25
1214.25:167:25
1314.25:167:26
1414.25:167:26
1514.25:167:26
1614.25:167:27
1714.25:167:27
1814.25:167:27
1914.25:167:28
2014.25:167:28
2114.25:177:28
2214.25:177:28
2314.25:177:29
2414.25:177:29
2514.25:177:29
2614.25:187:29
2714.25:187:29
2814.25:187:29
2914.25:197:29
3014.25:197:29

Solar energy in June

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in June, about 4.55 kWh/m².

For context, solar energy here swings from a low near 2.13 kWh/m² to a high of 5.4 kWh/m² in May across the year — June's 4.55 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.3Bright
25.3Bright
35.3Bright
45.2Bright
55.2Bright
65.1Bright
75.1Bright
85.0Bright
95.0Bright
104.9Bright
114.9Bright
124.8Bright
134.7Bright
144.7Bright
154.6Bright
164.6Bright
174.5Bright
184.4Bright
194.4Bright
204.3Bright
214.2Bright
224.2Bright
234.1Bright
244.1Bright
254.1Bright
264.0Bright
274.0Bright
284.0Bright
294.0Bright
304.0Bright
Planning a trip in June

Hazard calendar for Sasebo

In seasonPeak

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

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

Sasebo's rainy season runs May–September, 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 June a good time to visit Sasebo?

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

5.5
Sightseeing
6th-best month of the year
5.3
Beach & pool
5th-best month of the year

June is a reasonable time to visit Sasebo for sightseeing.

What to pack for Sasebo in June

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

In June, Sasebo sees daytime highs around 26°C and nights near 20°C. Pack rain gear. Worth having: light clothes and sun protection. About 16 days see rain.

rain gearlight clothessun protection

Sea temperature near Sasebo 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 offshore is warmest in August at about 27°C and coldest in February near 15°C.

It's comfortable for a long swim from Jun 1 to Nov 26 — about 5.9 months when the water holds above 20°C.

15°20°25°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan16Cool
Feb15Bracing
Mar15Cool
Apr16Cool
May19Cool
Jun21Refreshing
Jul25Warm
Aug27Warm
Sep26Warm
Oct24Refreshing
Nov21Refreshing
Dec18Cool

UV index in Sasebo in June

LowModerateHighVery highExtreme

Clear-sky midday UV in June 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 Sasebo peaks around July 18 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 11 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highModerateJul 18UV 10Dec 21UV 3
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar6High
Apr7Very high
May8Very high
Jun9Very high
Jul10Very high
Aug9Very high
Sep9Very high
Oct6High
Nov4Moderate
Dec3Moderate

Air quality in Sasebo 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 Sasebo is worst in April — around 24 µg/m³ PM2.5 (moderate), about 2.1× the cleanest month (October, 11 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateModerateGoodModerateApr 1324 µg/m³Oct 1212 µg/m³
PM2.5 (µg/m³)Level
Jan16Moderate
Feb19Moderate
Mar23Moderate
Apr24Moderate
May21Moderate
Jun17Moderate
Jul12Good
Aug12Moderate
Sep12Good
Oct11Good
Nov14Moderate
Dec13Moderate
Location & terrain

Where is Sasebo?

Sasebo sits at 33.2°N, 129.7°E, 8 m above sea level, in Japan. The nearest listed city is Arita, 16 km away.

Topography around Sasebo

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

Within 3 km, the terrain around Sasebo has significant variations in elevation — a maximum elevation change of 561 m around an average of 104 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 779 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,455 m.

The land around Sasebo is covered by trees (46%) and artificial surfaces (38%) within 3 km, trees (58%) and water (28%) within 16 km, and water (66%) and trees (24%) within 80 km.

3 km
561 m
16 km
779 m
80 km
1,455 m
treesgrasslandcroplandartificial surfacesbare terrainwater
June weather nearby: Arita 16 km · Imarichō-kō 18 km · Matsuura 19 km · Saikai 21 km · Ureshinomachi-shimojuku 27 km · Hirado 27 km · Takeo 28 km · Kashima 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 Sasebo (33.1683°, 129.725°, elevation 8 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).