Ishinari weather in May

In May, Ishinari sees average daytime highs of 24°C and overnight lows near 15°C, with 170 mm of rain across 11 wet days and about 13.7 hours of daylight. It is the 5th-warmest and 5th-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 27% of the time in May, and the air most often feels dry.

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 Ishinari's 9th-clearest and 10th-windiest month. For the whole year in context, see Ishinari's year-round climate.

Daytime high
24°
5th warmest
Overnight low
15°
8th coldest
Rainfall
170 mm
11 wet days
Daylight
13 h 42 min
5:23 AM – 7:06 PM
Cloud cover
66%
9th clearest
Wind
8 km/h
10th windiest
Solar energy
5.24 kWh/m²
Travel score
6.6
out of 10

Temperature in May

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 May day in Ishinari reaches about 24°C in the afternoon and slips back to 15°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 20°C and 27°C. Set against its neighbours, May runs about 4°C warmer than April and about 3°C cooler than June.

10°15°20°25°30°151015202531
Avg high (°C)Avg low (°C)
12213
22213
32213
42313
52313
62313
72313
82314
92314
102314
112314
122414
132414
142414
152414
162415
172415
182415
192415
202415
212515
222515
232515
242516
252516
262516
272516
282516
292516
302517
312617

How May really feels in Ishinari

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.

Ishinari weather by month

How May compares with the rest of the year at a glance. May is the 5th-warmest and 5th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan10° / 6180.7102.3
Feb11° / 808.60.410.82.8
Mar15° / 12811.30.111.74.3
Apr20° / 10°14711.3012.85.9
May24° / 15°17011013.76.6
Jun26° / 19°37216.6014.25.3
Jul30° / 23°33417.50144.2
Aug31° / 24°17514.3013.24.0
Sep28° / 20°18012012.25.7
Oct23° / 14°1067.8011.27.3
Nov18° / 898.1010.35.9
Dec12° / 707.50.19.83.4

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 27% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 12% of May, with mostly cloudy or overcast conditions the remaining 61%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14258
24258
34258
44258
54060
64060
74060
83961
93961
104060
113961
123862
133862
143862
153961
163961
173961
183862
193862
203862
213862
223763
233862
243961
253862
263862
273862
283664
293664
303565
313565

Chance of precipitation in May

Any precipitation

Ishinari gets around 170 mm of rain over 11 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 38% on the wettest days.

0%10%20%30%40%50%151015202531
Rain chance (%)
136
236
336
436
536
636
737
837
937
1037
1137
1238
1338
1437
1537
1637
1737
1836
1936
2036
2136
2235
2335
2435
2534
2634
2734
2834
2934
3035
3135

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, May lands in the dry band about 39% of days. Sticky, muggy-or-worse air turns up on roughly 8% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
157271240
256271340
355281340
452291450
552291450
650301550
749301550
848301560
947311660
1046311660
1145321660
1244331670
1343331670
1442341670
1541351770
1640361770
1739361870
1838371870
1936371970
2035372080
2134372181
2232372281
2331372391
2429372491
2528372591
26263627101
27253628111
28233530121
29213432131
30193333141
31183235151

Wind in May

Winds average 8 km/h in May.

Across May, daily wind ranges from about 7 km/h on the calmest days to 8 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
18calm
28calm
38calm
48calm
58calm
68calm
78calm
88calm
98calm
108calm
118calm
128calm
138calm
148calm
158calm
168calm
178calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm
317calm

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 5:36 AM to 5:15 AM, and sunset from 6:55 PM to 7:17 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.35:366:55
213.35:356:56
313.45:346:56
413.45:336:57
513.45:326:58
613.55:316:59
713.55:306:59
813.55:307:00
913.55:297:01
1013.65:287:02
1113.65:277:02
1213.65:267:03
1313.65:257:04
1413.75:257:05
1513.75:247:05
1613.75:237:06
1713.75:227:07
1813.85:227:08
1913.85:217:08
2013.85:207:09
2113.85:207:10
2213.95:197:11
2313.95:197:11
2413.95:187:12
2513.95:187:13
2613.95:177:13
2714.05:177:14
2814.05:167:15
2914.05:167:15
3014.05:157:16
3114.05:157:17

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.24 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 2.2 kWh/m² to a high of 5.24 kWh/m² in May across the year — May's 5.24 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
155.2Bright
165.3Bright
175.3Bright
185.3Bright
195.3Bright
205.3Bright
215.3Bright
225.3Bright
235.3Bright
245.3Bright
255.3Bright
265.3Bright
275.3Bright
285.2Bright
295.2Bright
305.2Bright
315.2Bright
Planning a trip in May

Hazard calendar for Ishinari

In seasonPeak

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

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

Ishinari'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 May a good time to visit Ishinari?

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

6.6
Sightseeing
2nd-best month of the year
5.5
Beach & pool
5th-best month of the year

May is a reasonable time to visit Ishinari for sightseeing.

What to pack for Ishinari in May

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

In May, Ishinari sees daytime highs around 24°C and nights near 15°C. Worth packing: light clothes, rain gear and sun protection. About 11 days see rain.

light clothesrain gearsun protection

Sea temperature near Ishinari 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 26 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 May 27 to Nov 12 — about 5.6 months when the water holds above 20°C.

10°15°20°25°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan14Bracing
Feb13Bracing
Mar14Bracing
Apr16Cool
May19Cool
Jun22Refreshing
Jul25Warm
Aug27Warm
Sep26Warm
Oct23Refreshing
Nov20Cool
Dec17Cool

UV index in Ishinari 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 Ishinari peaks around July 18 at about 10 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 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 22UV 3
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar6High
Apr8Very high
May8Very high
Jun8Very high
Jul10Very high
Aug9Very high
Sep9Very high
Oct7High
Nov4Moderate
Dec3Moderate

Air quality in Ishinari 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 Ishinari is worst in March — around 25 µg/m³ PM2.5 (moderate), about 1.9× the cleanest month (July, 13 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateMar 2325 µg/m³Jul 2114 µg/m³
PM2.5 (µg/m³)Level
Jan18Moderate
Feb20Moderate
Mar25Moderate
Apr25Moderate
May23Moderate
Jun19Moderate
Jul13Moderate
Aug15Moderate
Sep14Moderate
Oct14Moderate
Nov16Moderate
Dec15Moderate
Location & terrain

Where is Ishinari?

Ishinari sits at 33.4°N, 130.4°E, 42 m above sea level, in Japan. The nearest listed city is Nakatsukuma, 5.0 km away.

Topography around Ishinari

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

Within 3 km, the terrain around Ishinari has significant variations in elevation — a maximum elevation change of 551 m around an average of 156 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 1,044 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,497 m.

The land around Ishinari is covered by trees (66%) within 3 km, trees (48%), cropland (25%) and artificial surfaces (22%) within 16 km, and trees (45%) and water (35%) within 80 km.

3 km
551 m
16 km
1,044 m
80 km
1,497 m
treesgrasslandcroplandartificial surfaceswater
May weather nearby: Nakatsukuma 5.0 km · Kanzakimachi-kanzaki 7.0 km · Tosu 10 km · Sonobe 11 km · Kurume 12 km · Ogōri 14 km · Saga 17 km · Ōkawa 18 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 Ishinari (33.3615°, 130.4048°, elevation 42 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).