Amakusa weather in June

In June, Amakusa sees average daytime highs of 27°C and overnight lows near 21°C, with 445 mm of rain across 17.4 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 26°C in the first days to 28°C by the end. The sky is clear or mostly clear about 11% 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 06 min by month's end. Set against the rest of the year, June is Amakusa's 12th-clearest and 10th-windiest month. For the whole year in context, see Amakusa's year-round climate.

Daytime high
27°
4th warmest
Overnight low
21°
9th coldest
Rainfall
445 mm
17.4 wet days
Daylight
14 h 06 min
5:16 AM – 7:23 PM
Cloud cover
82%
12th clearest
Wind
9 km/h
10th windiest
Solar energy
4.33 kWh/m²
Travel score
5.0
out of 10

Temperature in June

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 26°C in the first days to 28°C by the end.

A typical June day in Amakusa reaches about 27°C in the afternoon and slips back to 21°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 24°C and 30°C. Set against its neighbours, June runs about 2°C warmer than May and about 4°C cooler than July.

15°20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
12619
22619
32619
42619
52619
62619
72620
82620
92620
102720
112720
122720
132720
142721
152721
162721
172721
182721
192721
202722
212722
222722
232722
242722
252722
262822
272823
282823
292823
302823

How June really feels in Amakusa

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.

Amakusa 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 daysDaylight (hours)Travel score
Jan11° / 698.410.13.0
Feb13° / 879.110.83.4
Mar16° / 13111.511.84.8
Apr21° / 13°1521112.86.1
May25° / 17°18111.113.66.5
Jun27° / 21°44517.414.15.0
Jul31° / 25°36619.113.93.6
Aug32° / 25°18315.513.23.4
Sep29° / 22°19712.812.25.0
Oct25° / 17°1048.111.27.2
Nov19° / 12°1018.410.36.3
Dec14° / 817.49.94.1

Cloud cover in June

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 11% 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 82%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
13169
23070
32971
42773
52674
62575
72476
82377
92278
102080
112080
121981
131882
141882
151585
161585
171585
181585
191387
201387
211387
221288
231288
241288
251288
261288
271288
281288
291387
301585

Chance of precipitation in June

Any precipitation

Amakusa gets around 445 mm of rain over 17.4 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 58% and peaks near 77% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%151015202530
Rain chance (%)
137
238
339
440
541
642
743
845
946
1048
1149
1251
1353
1455
1557
1659
1761
1863
1965
2067
2169
2270
2372
2473
2574
2675
2776
2877
2977
3077

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 37% of days. Sticky, muggy-or-worse air turns up on roughly 71% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1721402850
2619392960
3618393170
4516383380
5415373491
64133636111
73123537121
83113339141
9293240151
10283141172
11172942182
12162743202
13152644223
14142445233
15042246254
16032046265
17031846286
18031645297
19021445318
200212433310
210211423411
22029403613
23018393715
24016373817
25015344019
26014324121
27013304224
28013274326
29012254428
30012234530

Wind in June

Winds average 9 km/h in June.

Across June, daily wind ranges from about 8 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
18calm
28calm
38calm
48calm
58calm
68calm
78calm
88calm
98calm
108calm
118calm
128calm
138calm
148calm
158calm
169calm
179calm
189calm
199calm
209calm
219calm
2210calm
2310calm
2410calm
2510calm
2610calm
2710calm
2810calm
2911calm
3011calm

Sunrise & sunset in June

DaylightNight

Daylight runs from about 14 hours 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 6 minutes over June. Sunrise moves from 5:18 AM to 5:19 AM, and sunset from 7:16 PM to 7:26 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
114.05:187:16
214.05:177:16
314.05:177:17
414.05:177:18
514.05:177:18
614.05:167:19
714.05:167:19
814.15:167:20
914.15:167:20
1014.15:167:21
1114.15:167:21
1214.15:167:21
1314.15:167:22
1414.15:167:22
1514.15:167:23
1614.15:167:23
1714.15:167:23
1814.15:167:24
1914.15:167:24
2014.15:167:24
2114.15:177:25
2214.15:177:25
2314.15:177:25
2414.15:177:25
2514.15:177:25
2614.15:187:25
2714.15:187:26
2814.15:187:26
2914.15:197:26
3014.15:197:26

Solar energy in June

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in June, about 4.33 kWh/m².

For context, solar energy here swings from a low near 2.23 kWh/m² to a high of 5.26 kWh/m² in May across the year — June's 4.33 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.1Bright
25.1Bright
35.0Bright
45.0Bright
55.0Bright
64.9Bright
74.8Bright
84.8Bright
94.7Bright
104.7Bright
114.6Bright
124.5Bright
134.5Bright
144.4Bright
154.3Bright
164.3Bright
174.2Bright
184.2Bright
194.1Bright
204.1Bright
214.0Bright
224.0Bright
234.0Moderate
243.9Moderate
253.9Moderate
263.9Moderate
273.9Moderate
283.9Moderate
293.9Moderate
304.0Moderate
Planning a trip in June

Hazard calendar for Amakusa

In seasonPeak

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

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

Amakusa'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 Amakusa?

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

5.0
Sightseeing
5th-best month of the year
5.2
Beach & pool
6th-best month of the year

June is a reasonable time to visit Amakusa for sightseeing.

What to pack for Amakusa in June

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

In June, Amakusa sees daytime highs around 27°C and nights near 21°C. Pack rain gear. Worth having: light clothes. About 17 days see rain.

rain gearlight clothes

Sea temperature near Amakusa in June

The nearest coast averages about 22°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 20 km away) is warmest in August at about 27°C and coldest in February near 15°C.

It's comfortable for a long swim from May 24 to Nov 24 — about 6.1 months when the water holds above 20°C.

15°20°25°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan16Cool
Feb15Bracing
Mar15Cool
Apr17Cool
May19Cool
Jun22Refreshing
Jul25Warm
Aug27Warm
Sep26Warm
Oct24Refreshing
Nov21Refreshing
Dec18Cool

UV index in Amakusa 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 Amakusa peaks around July 13 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 — every month of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highExtremeVery highHighModerateJul 13UV 10Dec 21UV 3
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar6High
Apr8Very high
May8Very high
Jun10Very high
Jul11Extreme
Aug9Very high
Sep10Very high
Oct7High
Nov4Moderate
Dec3Moderate

Air quality in Amakusa 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 Amakusa 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 Amakusa?

Amakusa sits at 32.5°N, 130.2°E, 6 m above sea level, in Japan. The nearest listed city is Hondomachi-hondo, 2.0 km away.

Topography around Amakusa

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

Within 3 km, the terrain around Amakusa has significant variations in elevation — a maximum elevation change of 310 m around an average of 40 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 664 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,724 m.

The land around Amakusa is covered by trees (52%), artificial surfaces (22%) and water (20%) within 3 km, trees (54%) and water (40%) within 16 km, and water (48%) and trees (42%) within 80 km.

3 km
310 m
16 km
664 m
80 km
1,724 m
treesgrasslandcroplandartificial surfaceswater
June weather nearby: Hondomachi-hondo 2.0 km · Minamishimabara 25 km · Ōyanomachi-noboritate 27 km · Ushibukamachi 33 km · Minamata 33 km · Sashiki 34 km · Unzen 35 km · Honmachi 38 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 Amakusa (32.4586°, 130.1931°, elevation 6 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).