Amakusa weather in May

In May, Amakusa sees average daytime highs of 25°C and overnight lows near 17°C, with 181 mm of rain across 11.1 wet days and about 13.6 hours of daylight. It is the 6th-warmest and 5th-wettest month of the year here.

Highs climb over the month, from about 23°C in the first days to 26°C by the end. The sky is clear or mostly clear about 26% of the time in May, and the air most often feels comfortable.

Daylight stretches from about 13 h 18 min at the start of May to 14 hours by month's end. Set against the rest of the year, May is Amakusa's 10th-clearest and 10th-windiest month. For the whole year in context, see Amakusa's year-round climate.

Daytime high
25°
6th warmest
Overnight low
17°
7th coldest
Rainfall
181 mm
11.1 wet days
Daylight
13 h 42 min
5:26 AM – 7:05 PM
Cloud cover
67%
10th clearest
Wind
9 km/h
10th windiest
Solar energy
5.26 kWh/m²
Travel score
6.5
out of 10

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 23°C in the first days to 26°C by the end.

A typical May day in Amakusa reaches about 25°C in the afternoon and slips back to 17°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 21°C and 28°C. Set against its neighbours, May runs about 4°C warmer than April and about 2°C cooler than June.

10°15°20°25°30°151015202531
Avg high (°C)Avg low (°C)
12315
22315
32315
42316
52316
62316
72416
82416
92416
102416
112416
122416
132417
142417
152517
162517
172517
182517
192517
202517
212517
222517
232518
242518
252518
262618
272618
282618
292618
302618
312619

How May really feels in Amakusa

Once humidity and wind are folded in, May 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

May 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 May compares with the rest of the year at a glance. May is the 6th-warmest and 5th-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 May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 26% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 11% of May, with mostly cloudy or overcast conditions the remaining 63%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14060
24060
33961
43961
53961
63862
73961
83862
93862
103862
113763
123763
133862
143862
153763
163763
173763
183763
193763
203763
213664
223664
233763
243763
253664
263664
273565
283466
293466
303367
313268

Chance of precipitation in May

Any precipitation

Amakusa gets around 181 mm of rain over 11.1 wet days in May. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 36% and peaks near 37% on the wettest days.

0%10%20%30%40%50%151015202531
Rain chance (%)
137
237
337
437
537
637
737
837
937
1037
1137
1237
1337
1436
1536
1636
1735
1835
1935
2035
2135
2235
2335
2435
2535
2635
2735
2835
2936
3036
3137

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, May lands in the comfortable band about 31% of days. Sticky, muggy-or-worse air turns up on roughly 15% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
146281781
244291891
342291991
440301991
5383020101
6373121101
7353122101
8343123112
9323223112
10313224112
11303325112
12283425112
13273426112
14263526112
15253527112
16233528112
17223629112
18213530122
19203531122
20193532122
21183434132
22163335142
23153336142
24143237152
25133138172
26122938182
27122839192
28112740212
29102540233
3092440243
3182240264

Wind in May

Winds average 9 km/h in May.

Across May, daily wind ranges from about 8 km/h on the calmest days to 10 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
110calm
210calm
39calm
49calm
59calm
69calm
79calm
89calm
99calm
109calm
119calm
129calm
139calm
149calm
159calm
169calm
179calm
189calm
199calm
208calm
218calm
228calm
238calm
248calm
258calm
268calm
278calm
288calm
298calm
308calm
318calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 13 h 18 min at the start of May to 14 hours by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 42 minutes over May. Sunrise moves from 5:39 AM to 5:18 AM, and sunset from 6:54 PM to 7:15 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.35:396:54
213.35:386:55
313.35:376:56
413.35:366:57
513.45:356:57
613.45:346:58
713.45:336:59
813.55:326:59
913.55:317:00
1013.55:307:01
1113.55:297:02
1213.65:297:02
1313.65:287:03
1413.65:277:04
1513.65:267:05
1613.75:267:05
1713.75:257:06
1813.75:247:07
1913.75:247:07
2013.85:237:08
2113.85:227:09
2213.85:227:09
2313.85:217:10
2413.85:217:11
2513.95:207:11
2613.95:207:12
2713.95:197:13
2813.95:197:13
2913.95:197:14
3013.95:187:15
3114.05:187:15

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.26 kWh/m² — the sunniest month for solar.

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 — May's 5.26 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.2Bright
25.2Bright
35.2Bright
45.2Bright
55.2Bright
65.2Bright
75.2Bright
85.2Bright
95.2Bright
105.2Bright
115.2Bright
125.2Bright
135.2Bright
145.2Bright
155.3Bright
165.3Bright
175.3Bright
185.3Bright
195.3Bright
205.3Bright
215.3Bright
225.3Bright
235.3Bright
245.3Bright
255.3Bright
265.3Bright
275.3Bright
285.3Bright
295.2Bright
305.2Bright
315.2Bright
Planning a trip in May

Hazard calendar for Amakusa

In seasonPeak

In May, Amakusa sits inside its pacific typhoon 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 May a good time to visit Amakusa?

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

6.5
Sightseeing
2nd-best month of the year
5.7
Beach & pool
3rd-best month of the year

May is a reasonable time to visit Amakusa for sightseeing.

What to pack for Amakusa in May

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

In May, Amakusa sees daytime highs around 25°C and nights near 17°C. Worth packing: light clothes, rain gear and sun protection. About 11 days see rain.

light clothesrain gearsun protection

Sea temperature near Amakusa in May

The nearest coast averages about 19°C in May — 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 May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 8 — enough to warrant sun protection. 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 May

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where May 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
May 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).