Isa weather in June

In June, Isa sees average daytime highs of 26°C and overnight lows near 20°C, with 528 mm of rain across 19.6 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 9% of the time in June, and the air most often feels muggy.

Daylight stretches from about 13 h 54 min at the start of June to 14 h 06 min by month's end. Set against the rest of the year, June is Isa's 12th-clearest and 11th-windiest month. For the whole year in context, see Isa's year-round climate.

Daytime high
26°
4th warmest
Overnight low
20°
9th coldest
Rainfall
528 mm
19.6 wet days
Daylight
14 h 06 min
5:15 AM – 7:20 PM
Cloud cover
84%
12th clearest
Wind
8 km/h
11th windiest
Solar energy
4.04 kWh/m²
Travel score
4.9
out of 10

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 Isa 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 2°C warmer than May and about 4°C cooler than July.

10°15°20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
12518
22518
32518
42518
52518
62518
72519
82519
92519
102519
112519
122619
132620
142620
152620
162620
172620
182620
192621
202621
212621
222621
232621
242621
252722
262722
272722
282722
292722
302722

How June really feels in Isa

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.

Isa 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
Jan11° / 829.80.810.12.6
Feb12° / 1069.60.410.83.1
Mar15° / 15113.20.111.84.3
Apr20° / 11°18412.1012.85.8
May23° / 16°20912.3013.66.3
Jun26° / 20°52819.6014.14.9
Jul30° / 24°37320.1013.93.9
Aug31° / 24°18417.2013.23.8
Sep28° / 21°19414.3012.25.3
Oct24° / 16°1108.7011.27.2
Nov18° / 10°1118.8010.46.1
Dec13° / 908.70.29.93.7

Cloud cover in June

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 9% of the time in June, the cloudiest month of the year.

Beyond those clear spells, partly cloudy skies cover about 7% of June, with mostly cloudy or overcast conditions the remaining 83%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
12674
22575
32575
42377
52377
62278
72278
82179
91981
101981
111981
121783
131783
141783
151684
161684
171486
181387
191387
201387
211288
221288
231288
241288
251288
261189
271189
281189
291288
301387

Chance of precipitation in June

Any precipitation

Isa gets around 528 mm of rain over 19.6 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 65% and peaks near 81% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%151015202530
Rain chance (%)
144
246
347
448
550
651
753
854
955
1057
1159
1260
1362
1464
1566
1667
1769
1871
1972
2073
2175
2276
2377
2478
2579
2680
2780
2881
2980
3080

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 34% of days. Sticky, muggy-or-worse air turns up on roughly 63% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1928382230
2826392340
3624402550
4623402660
5521402870
6419402980
7317403190
82163932100
92143934110
102123835131
111103736141
12193538161
13183439181
14063240201
15053141221
16052841242
17042641262
18032441293
19032241313
20022040334
21021839365
22021638385
23011437416
24011336437
25011134468
2601933489
27008315110
28007295311
29006275512
30005255713

Wind in June

Winds average 8 km/h in June.

Across June, daily wind ranges from about 7 km/h on the calmest days to 9 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
18calm
27calm
37calm
47calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
128calm
138calm
148calm
158calm
168calm
178calm
188calm
198calm
208calm
218calm
228calm
238calm
248calm
258calm
268calm
279calm
289calm
299calm
309calm

Sunrise & sunset in June

DaylightNight

Daylight runs from about 13 h 54 min at the start of June to 14 h 06 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 5:17 AM to 5:18 AM, and sunset from 7:13 PM to 7:23 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.95:177:13
214.05:177:14
314.05:167:14
414.05:167:15
514.05:167:16
614.05:167:16
714.05:167:17
814.05:157:17
914.05:157:18
1014.05:157:18
1114.15:157:18
1214.15:157:19
1314.15:157:19
1414.15:157:20
1514.15:157:20
1614.15:157:20
1714.15:157:21
1814.15:157:21
1914.15:167:21
2014.15:167:22
2114.15:167:22
2214.15:167:22
2314.15:167:22
2414.15:167:22
2514.15:177:23
2614.15:177:23
2714.15:177:23
2814.15:187:23
2914.15:187:23
3014.15:187:23

Solar energy in June

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in June, about 4.04 kWh/m².

For context, solar energy here swings from a low near 2.42 kWh/m² to a high of 5.06 kWh/m² in May across the year — June's 4.04 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
14.9Bright
24.8Bright
34.8Bright
44.7Bright
54.7Bright
64.6Bright
74.5Bright
84.5Bright
94.4Bright
104.3Bright
114.3Bright
124.2Bright
134.2Bright
144.1Bright
154.0Bright
164.0Moderate
173.9Moderate
183.9Moderate
193.8Moderate
203.8Moderate
213.7Moderate
223.7Moderate
233.7Moderate
243.7Moderate
253.7Moderate
263.7Moderate
273.7Moderate
283.7Moderate
293.7Moderate
303.8Moderate
Planning a trip in June

Hazard calendar for Isa

In seasonPeak

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

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

Isa'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 June a good time to visit Isa?

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

4.9
Sightseeing
6th-best month of the year
4.7
Beach & pool
6th-best month of the year

June is a reasonable time to visit Isa for sightseeing.

What to pack for Isa in June

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

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

rain gearlight clothes

Sea temperature near Isa in June

The nearest coast averages about 23°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 23 km away) is warmest in August at about 28°C and coldest in February near 16°C.

It's comfortable for a long swim from May 16 to Dec 4 — about 6.7 months when the water holds above 20°C.

15°20°25°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan17Cool
Feb16Cool
Mar17Cool
Apr18Cool
May20Refreshing
Jun23Refreshing
Jul26Warm
Aug28Warm
Sep27Warm
Oct24Warm
Nov22Refreshing
Dec19Cool

UV index in Isa in June

LowModerateHighVery highExtreme

Clear-sky midday UV in June peaks around 11 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Isa peaks around June 22 at about 11 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 23 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 highHighModerateJun 22UV 11Dec 23UV 3
UV index (midday)Level
Jan3Moderate
Feb5Moderate
Mar7High
Apr8Very high
May8Very high
Jun11Extreme
Jul11Extreme
Aug9Very high
Sep10Very high
Oct6High
Nov5Moderate
Dec3Moderate

Air quality in Isa 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 Isa 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 Isa?

Isa sits at 32.1°N, 130.6°E, 183 m above sea level, in Japan. The nearest listed city is Ōkuchi-shinohara, 1.0 km away.

Topography around Isa

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

Within 3 km, the terrain around Isa has significant variations in elevation — a maximum elevation change of 275 m around an average of 207 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 962 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,715 m.

The land around Isa is covered by trees (44%) and cropland (38%) within 3 km, trees (87%) within 16 km, and trees (60%) and water (30%) within 80 km.

3 km
275 m
16 km
962 m
80 km
1,715 m
treesgrasslandcroplandartificial surfaceswater
June weather nearby: Ōkuchi-shinohara 1.0 km · Tsuruda 18 km · Hitoyoshi 21 km · Ebino 22 km · Izumi 23 km · Minamata 26 km · Sashiki 28 km · Aira 33 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 Isa (32.0672°, 130.6118°, elevation 183 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).