Nanjō weather in May

In May, Nanjō sees average daytime highs of 24°C and overnight lows near 23°C, with 207 mm of rain across 13.8 wet days and about 13.3 hours of daylight. It is the 6th-warmest and 2nd-wettest month of the year here.

Highs climb over the month, from about 23°C in the first days to 25°C by the end. The sky is clear or mostly clear about 20% of the time in May, and the air most often feels oppressive.

Daylight stretches from about 13 hours at the start of May to 13 h 30 min by month's end. Set against the rest of the year, May is Nanjō's 9th-clearest and 12th-windiest month. For the whole year in context, see Nanjō's year-round climate.

Daytime high
24°
6th warmest
Overnight low
23°
7th coldest
Rainfall
207 mm
13.8 wet days
Daylight
13 h 18 min
5:47 AM – 7:03 PM
Cloud cover
70%
9th clearest
Wind
21 km/h
12th windiest
Solar energy
5.29 kWh/m²
Travel score
6.1
out of 10

Nanjō is city in Okinawa Prefecture, Japan.

Density
882/km²
people per km²
Founded
2006

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 23°C in the first days to 25°C by the end.

A typical May day in Nanjō reaches about 24°C in the afternoon and slips back to 23°C overnight — a 1°C spread between the day's warmth and the night's chill. On most days the high lands between 23°C and 26°C. Set against its neighbours, May runs about 2°C warmer than April and about 2°C cooler than June.

15°20°25°30°151015202531
Avg high (°C)Avg low (°C)
12322
22322
32322
42322
52422
62422
72422
82422
92423
102423
112423
122423
132423
142423
152423
162423
172523
182523
192523
202523
212523
222524
232524
242524
252524
262524
272524
282524
292524
302524
312624

How May really feels in Nanjō

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.

Nanjō weather by month

How May compares with the rest of the year at a glance. May is the 6th-warmest and 2nd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan19° / 17°10311.710.55.7
Feb19° / 17°9611.411.15.6
Mar20° / 18°12812.711.85.9
Apr22° / 20°15012.712.66.1
May24° / 23°20713.813.36.1
Jun27° / 26°21815.813.65.4
Jul29° / 27°12611.413.55.5
Aug29° / 27°17814.812.95.1
Sep28° / 27°19914.212.25.7
Oct26° / 25°14111.611.46.5
Nov24° / 22°10110.610.76.7
Dec21° / 19°11311.210.46.1

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 20% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 13% of May, with mostly cloudy or overcast conditions the remaining 67%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13466
23466
33466
43565
53466
63466
73565
83664
93565
103565
113565
123565
133466
143466
153565
163367
173367
183367
193268
203268
213268
223169
233169
243169
253169
263169
273070
283070
293070
302971
312872

Chance of precipitation in May

Any precipitation

Nanjō gets around 207 mm of rain over 13.8 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 46% and peaks near 51% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%151015202531
Rain chance (%)
143
242
342
441
541
641
741
842
942
1043
1144
1244
1345
1446
1546
1647
1747
1847
1948
2048
2148
2248
2348
2448
2548
2649
2749
2849
2950
3051
3151

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, May lands in the oppressive band about 42% of days. Sticky, muggy-or-worse air turns up on roughly 77% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
17142225321
26132225331
36132125341
45132126351
54122026361
64122026362
73111927382
83101828393
92101728403
10291728414
11181628424
12181529435
13171529435
14171429446
15061429456
16061429457
17061328457
18051328468
19051327469
200513274610
210413264611
220413254612
230413244613
240413244514
250313234516
260313224517
270312214519
280312214520
290211204522
300210194524
31029184526

Wind in May

Winds average 21 km/h in May, the calmest month.

Across May, daily wind ranges from about 21 km/h on the calmest days to 22 km/h at its breeziest. It stays fairly steady from day to day.

0510152025151015202531
Wind speed (km/h)Feels
122breezy
222breezy
321breezy
421breezy
521breezy
621breezy
721breezy
821breezy
921breezy
1021breezy
1121breezy
1221breezy
1321breezy
1421breezy
1521breezy
1621breezy
1721breezy
1821breezy
1921breezy
2021breezy
2121breezy
2221breezy
2321breezy
2421breezy
2521breezy
2621breezy
2721breezy
2821breezy
2921breezy
3021breezy
3121breezy

Sunrise & sunset in May

DaylightNight

Daylight runs from about 13 hours at the start of May to 13 h 30 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 30 minutes over May. Sunrise moves from 5:57 AM to 5:41 AM, and sunset from 6:55 PM to 7:11 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.05:576:55
213.05:566:56
313.05:556:56
413.05:556:57
513.15:546:57
613.15:536:58
713.15:526:59
813.15:526:59
913.15:517:00
1013.25:507:00
1113.25:507:01
1213.25:497:01
1313.25:497:02
1413.25:487:02
1513.35:477:03
1613.35:477:03
1713.35:467:04
1813.35:467:05
1913.35:457:05
2013.35:457:06
2113.45:447:06
2213.45:447:07
2313.45:447:07
2413.45:437:08
2513.45:437:08
2613.45:437:09
2713.55:427:09
2813.55:427:10
2913.55:427:10
3013.55:417:11
3113.55:417:11

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.29 kWh/m².

For context, solar energy here swings from a low near 2.39 kWh/m² to a high of 6.42 kWh/m² in July across the year — May's 5.29 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.2Bright
25.2Bright
35.3Bright
45.3Bright
55.3Bright
65.3Bright
75.3Bright
85.3Bright
95.3Bright
105.3Bright
115.3Bright
125.3Bright
135.3Bright
145.3Bright
155.3Bright
165.3Bright
175.3Bright
185.3Bright
195.2Bright
205.2Bright
215.2Bright
225.2Bright
235.2Bright
245.2Bright
255.2Bright
265.2Bright
275.2Bright
285.2Bright
295.2Bright
305.2Bright
315.2Bright
Planning a trip in May

Hazard calendar for Nanjō

In seasonPeak

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

Nanjō 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 Nanjō?

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

6.1
Sightseeing
3rd-best month of the year
5.3
Beach & pool
7th-best month of the year

May is a reasonable time to visit Nanjō for sightseeing.

What to pack for Nanjō in May

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

In May, Nanjō sees daytime highs around 24°C and nights near 23°C. Pack rain gear. Worth having: light clothes, sun protection and a windbreaker. About 14 days see rain.

rain gearlight clothessun protectiona windbreaker

Sea temperature near Nanjō in May

The nearest coast averages about 25°C in May — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea offshore is warmest in August at about 29°C and coldest in February near 22°C.

The water stays above 20°C all year — warm enough for a swim any month.

20°25°30°JanFebMarAprMayJunJulAugSepOctNovDeccoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan23Refreshing
Feb22Refreshing
Mar22Refreshing
Apr23Refreshing
May25Warm
Jun27Warm
Jul29Tropical
Aug29Tropical
Sep28Tropical
Oct27Warm
Nov26Warm
Dec24Refreshing

UV index in Nanjō in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May 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 Nanjō peaks around June 23 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 at about 5 (high).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecHighVery highExtremeVery highHighJun 23UV 12Dec 22UV 5
UV index (midday)Level
Jan5High
Feb7Very high
Mar10Very high
Apr9Very high
May10Very high
Jun12Extreme
Jul12Extreme
Aug11Extreme
Sep11Extreme
Oct8Very high
Nov7High
Dec5High

Air quality in Nanjō 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 Nanjō is worst in March — around 17 µg/m³ PM2.5 (moderate), about 2.1× the cleanest month (July, 8 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodMar 2017 µg/m³Jul 128 µg/m³
PM2.5 (µg/m³)Level
Jan12Good
Feb14Moderate
Mar17Moderate
Apr16Moderate
May13Moderate
Jun9Good
Jul8Good
Aug10Good
Sep9Good
Oct9Good
Nov10Good
Dec10Good
Location & terrain

Where is Nanjō?

Nanjō sits at 26.1°N, 127.8°E, 92 m above sea level, in Japan. The nearest listed city is Yaese, 3.0 km away.

Topography around Nanjō

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

Within 3 km, the terrain around Nanjō has only modest variations in elevation — a maximum elevation change of 190 m around an average of 68 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 191 m; within 80 km, significant variations in elevation — a maximum elevation change of 492 m.

The land around Nanjō is covered by trees (49%) within 3 km, water (67%) within 16 km, and water (91%) within 80 km.

3 km
190 m
16 km
191 m
80 km
492 m
treesgrasslandcroplandartificial surfacesbare terrainwater
May weather nearby: Yaese 3.0 km · Yonabaru 7.0 km · Kanegusuku 7.0 km · Tomigusuku 10 km · Itoman 10 km · Naha 12 km · Nakagusuku 12 km · Nishihara 12 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 Nanjō (26.1445°, 127.767°, elevation 92 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).