Nichinan weather in May

In May, Nichinan sees average daytime highs of 23°C and overnight lows near 18°C, with 210 mm of rain across 12.6 wet days and about 13.6 hours of daylight. It is the 6th-warmest and 4th-wettest month of the year here.

Highs climb over the month, from about 22°C in the first days to 24°C by the end. The sky is clear or mostly clear about 22% of the time in May, and the air most often feels humid.

Daylight stretches from about 13 h 12 min at the start of May to 13 h 54 min by month's end. Set against the rest of the year, May is Nichinan's 10th-clearest and 12th-windiest month. For the whole year in context, see Nichinan's year-round climate.

Daytime high
23°
6th warmest
Overnight low
18°
7th coldest
Rainfall
210 mm
12.6 wet days
Daylight
13 h 36 min
5:23 AM – 6:59 PM
Cloud cover
70%
10th clearest
Wind
13 km/h
12th windiest
Solar energy
5.21 kWh/m²
Travel score
6.2
out of 10

Nichinan is city in Miyazaki Prefecture, Japan.

Density
96/km²
people per km²
Founded
2009

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

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 24°C by the end.

A typical May day in Nichinan reaches about 23°C in the afternoon and slips back to 18°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between 21°C and 25°C. Set against its neighbours, May runs about 3°C warmer than April and about 2°C cooler than June.

10°15°20°25°30°151015202531
Avg high (°C)Avg low (°C)
12216
22216
32216
42216
52216
62216
72217
82217
92217
102317
112317
122317
132317
142317
152317
162318
172318
182318
192318
202318
212318
222318
232318
242418
252418
262419
272419
282419
292419
302419
312419

How May really feels in Nichinan

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.

Nichinan weather by month

How May compares with the rest of the year at a glance. May is the 6th-warmest and 4th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan12° / 887.710.23.5
Feb13° / 1048.810.83.8
Mar16° / 10°16912.811.84.8
Apr20° / 14°18511.912.85.9
May23° / 18°21012.613.66.2
Jun25° / 21°42120144.9
Jul29° / 25°23717.113.94.5
Aug30° / 25°20217.413.24.4
Sep27° / 23°26016.912.25.3
Oct23° / 18°17011.111.26.8
Nov19° / 13°119910.46.3
Dec14° / 866.9104.7

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 22% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 10% of May, with mostly cloudy or overcast conditions the remaining 68%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13763
23763
33763
43664
53565
63565
73565
83466
93466
103367
113466
123367
133466
143466
153466
163466
173268
183268
193268
203169
213169
223169
232971
242971
252971
262872
272773
282674
292575
302476
312377

Chance of precipitation in May

Any precipitation

Nichinan gets around 210 mm of rain over 12.6 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 41% and peaks near 49% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%151015202531
Rain chance (%)
139
239
339
439
539
639
739
839
939
1039
1139
1240
1340
1440
1540
1640
1740
1840
1940
2041
2141
2241
2342
2442
2543
2643
2744
2845
2946
3047
3149

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, May lands in the humid band about 29% of days. Sticky, muggy-or-worse air turns up on roughly 22% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1402820121
2382920121
3362921131
4353021131
5333022141
6313023142
7303024152
8293024152
9273025152
10263126153
11253126153
12243127153
13233127163
14223128163
15203129163
16193130163
17193130174
18183131174
19173032184
20163032184
21152933194
22142934204
23132834214
24122835224
25112736234
26102636244
2792536254
2882437275
2972337285
3062237305
3162036326

Wind in May

Winds average 13 km/h in May, the calmest month.

Across May, daily wind ranges from about 13 km/h on the calmest days to 14 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
114light breeze
214light breeze
313light breeze
413light breeze
513light breeze
613light breeze
713light breeze
813light breeze
913light breeze
1013light breeze
1113light breeze
1213light breeze
1313light breeze
1413light breeze
1513light breeze
1613light breeze
1713light breeze
1813light breeze
1913light breeze
2013light breeze
2113light breeze
2213light breeze
2313light breeze
2413light breeze
2513light breeze
2613light breeze
2713light breeze
2813light breeze
2913light breeze
3013light breeze
3113light breeze

Sunrise & sunset in May

DaylightNight

Daylight runs from about 13 h 12 min at the start of May to 13 h 54 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 42 minutes over May. Sunrise moves from 5:35 AM to 5:15 AM, and sunset from 6:48 PM to 7:09 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.25:356:48
213.25:346:49
313.35:336:50
413.35:326:50
513.35:316:51
613.45:306:52
713.45:306:53
813.45:296:53
913.45:286:54
1013.55:276:55
1113.55:266:55
1213.55:266:56
1313.55:256:57
1413.65:246:58
1513.65:236:58
1613.65:236:59
1713.65:227:00
1813.65:217:00
1913.75:217:01
2013.75:207:02
2113.75:207:02
2213.75:197:03
2313.85:197:04
2413.85:187:04
2513.85:187:05
2613.85:177:06
2713.85:177:06
2813.85:167:07
2913.95:167:07
3013.95:167:08
3113.95:157:09

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.21 kWh/m².

For context, solar energy here swings from a low near 2.74 kWh/m² to a high of 5.4 kWh/m² in July across the year — May's 5.21 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.3Bright
25.3Bright
35.3Bright
45.3Bright
55.3Bright
65.3Bright
75.2Bright
85.2Bright
95.2Bright
105.2Bright
115.2Bright
125.2Bright
135.2Bright
145.2Bright
155.2Bright
165.2Bright
175.2Bright
185.2Bright
195.2Bright
205.2Bright
215.2Bright
225.2Bright
235.2Bright
245.1Bright
255.1Bright
265.1Bright
275.1Bright
285.0Bright
295.0Bright
305.0Bright
314.9Bright
Planning a trip in May

Hazard calendar for Nichinan

In seasonPeak

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

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

Pacific typhoon
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is May a good time to visit Nichinan?

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

6.2
Sightseeing
3rd-best month of the year
4.7
Beach & pool
5th-best month of the year

May is a reasonable time to visit Nichinan for sightseeing.

What to pack for Nichinan in May

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

In May, Nichinan sees daytime highs around 23°C and nights near 18°C. Worth packing: light clothes, rain gear and sun protection. About 13 days see rain.

light clothesrain gearsun protection

Sea temperature near Nichinan in May

The nearest coast averages about 22°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 25 km away) is warmest in August at about 28°C and coldest in February near 19°C.

It's comfortable for a long swim from Apr 4 to Jan 14 — about 9.4 months when the water holds above 20°C.

20°25°30°JanFebMarAprMayJunJulAugSepOctNovDeccoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan20Cool
Feb19Cool
Mar19Cool
Apr21Refreshing
May22Refreshing
Jun24Warm
Jul27Warm
Aug28Tropical
Sep27Warm
Oct26Warm
Nov24Refreshing
Dec22Refreshing

UV index in Nichinan in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 8 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Nichinan peaks around June 22 at about 11 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near January 1 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 11Jan 1UV 3
UV index (midday)Level
Jan3Moderate
Feb5Moderate
Mar7High
Apr8Very high
May8Very high
Jun11Extreme
Jul11Extreme
Aug10Very high
Sep10Very high
Oct6High
Nov5Moderate
Dec3Moderate

Air quality in Nichinan 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 Nichinan is worst in April — around 22 µg/m³ PM2.5 (moderate), about 1.9× the cleanest month (July, 11 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodGoodModerateApr 1421 µg/m³Sep 1911 µg/m³
PM2.5 (µg/m³)Level
Jan15Moderate
Feb18Moderate
Mar21Moderate
Apr22Moderate
May20Moderate
Jun16Moderate
Jul11Good
Aug12Moderate
Sep11Good
Oct12Good
Nov13Moderate
Dec12Moderate
Location & terrain

Where is Nichinan?

Nichinan sits at 31.6°N, 131.4°E, 29 m above sea level, in Japan. The nearest listed city is Kushima, 17 km away.

Topography around Nichinan

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

Within 3 km, the terrain around Nichinan has significant variations in elevation — a maximum elevation change of 271 m around an average of 61 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 985 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,640 m.

The land around Nichinan is covered by trees (69%) and artificial surfaces (20%) within 3 km, trees (62%) and water (31%) within 16 km, and water (46%) and trees (45%) within 80 km.

3 km
271 m
16 km
985 m
80 km
1,640 m
treesgrasslandcroplandartificial surfaceswater
May weather nearby: Kushima 17 km · Mochibaru 28 km · Shibushi 29 km · Miyakonojō 32 km · Sueyoshichō-ninokata 34 km · Miyazaki 36 km · Soo 36 km · Honjō 43 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 Nichinan (31.6°, 131.3667°, elevation 29 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).