Nanto-shi weather in May

In May, Nanto-shi sees average daytime highs of 21°C and overnight lows near 10°C, with 186 mm of precipitation across 15.4 wet days and about 13.9 hours of daylight. It is the 5th-warmest and 10th-wettest month of the year here.

Highs climb over the month, from about 19°C in the first days to 22°C by the end. The sky is clear or mostly clear about 25% of the time in May, and the air most often feels dry.

Daylight stretches from about 13 h 30 min at the start of May to 14 h 18 min by month's end. Set against the rest of the year, May is Nanto-shi's 4th-clearest and 6th-windiest month. For the whole year in context, see Nanto-shi's year-round climate.

Daytime high
21°
5th warmest
Overnight low
10°
8th coldest
Precipitation
186 mm
15.4 wet days
Daylight
13 h 54 min
4:50 AM – 6:47 PM
Cloud cover
66%
4th clearest
Wind
7 km/h
6th windiest
Solar energy
5.66 kWh/m²
Travel score
5.6
out of 10

Nanto-shi is city in Toyama Prefecture, Japan.

Density
72/km²
people per km²
Founded
2004

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 19°C in the first days to 22°C by the end.

A typical May day in Nanto-shi reaches about 21°C in the afternoon and slips back to 10°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 16°C and 25°C. Set against its neighbours, May runs about 6°C warmer than April and about 3°C cooler than June.

10°20°30°151015202531
Avg high (°C)Avg low (°C)
1198
2198
3198
4199
5199
6209
7209
8209
9209
102010
112010
122010
132010
142010
152110
162110
172111
182111
192111
202111
212111
222211
232212
242212
252212
262212
272212
282212
292213
302213
312213

How May really feels in Nanto-shi

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.

Nanto-shi weather by month

How May compares with the rest of the year at a glance. May is the 5th-warmest and 10th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -4°23024.222.19.80.0
Feb / -4°17920.217.610.60.0
Mar / -1°20720.212.911.71.2
Apr15° / 17515.83.212.93.9
May21° / 10°18615.40.113.95.6
Jun24° / 16°24718.1014.45.3
Jul28° / 20°33221.7014.24.4
Aug29° / 21°24920.4013.44.3
Sep24° / 16°28918.5012.25.2
Oct19° / 10°223170.211.15.0
Nov13° / 19918.44.310.12.7
Dec / -2°23722.816.39.50.4

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 25% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 14% 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 (%)
14456
24456
34456
44357
54357
64357
74258
84258
94258
104159
114159
123961
133961
143961
153961
163961
173961
183961
193961
203862
213862
223763
233763
243664
253664
263565
273466
283367
293367
303169
313169

Chance of precipitation in May

Any precipitationSnow

Nanto-shi gets around 186 mm of rain and snow over 15.4 wet days in May. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 49% and peaks near 52% on the wettest days, and about 0 day brings snow.

0%20%40%60%151015202531
Rain chance (%)Snow chance (%)
1472
2471
3471
4471
5471
6481
7481
8491
9500
10500
11510
12510
13510
14520
15520
16510
17510
18510
19510
20510
21500
22500
23490
24490
25490
26480
27480
28480
29480
30480
31480

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 78% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)
19271
29271
39181
49091
59091
689101
788111
888111
987121
1086122
1185132
1285132
1385132
1484142
1584142
1682153
1781163
1881163
1980173
2077194
2176204
2275214
2372235
2471245
2569265
2667276
2764297
2862317
2959338
3056359
31533710

Wind in May

Winds average 7 km/h in May.

Across May, daily wind ranges from about 6 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
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
226calm
236calm
246calm
256calm
266calm
276calm
286calm
296calm
306calm
316calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 13 h 30 min at the start of May to 14 h 18 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 48 minutes over May. Sunrise moves from 5:05 AM to 4:41 AM, and sunset from 6:34 PM to 6:58 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.55:056:34
213.55:046:35
313.55:036:36
413.65:026:36
513.65:016:37
613.65:006:38
713.74:596:39
813.74:586:40
913.74:576:41
1013.84:566:42
1113.84:556:43
1213.84:546:43
1313.94:536:44
1413.94:526:45
1513.94:516:46
1613.94:506:47
1714.04:506:48
1814.04:496:49
1914.04:486:49
2014.04:476:50
2114.14:476:51
2214.14:466:52
2314.14:456:53
2414.14:456:53
2514.24:446:54
2614.24:436:55
2714.24:436:56
2814.24:426:56
2914.34:426:57
3014.34:416:58
3114.34:416:58

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.66 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 2.02 kWh/m² to a high of 5.66 kWh/m² in May across the year — May's 5.66 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.5Bright
25.5Bright
35.5Bright
45.5Bright
55.5Bright
65.5Bright
75.6Bright
85.6Bright
95.6Bright
105.6Bright
115.6Bright
125.6Bright
135.6Bright
145.6Bright
155.7Bright
165.7Bright
175.7Bright
185.7Bright
195.7Bright
205.8Bright
215.8Bright
225.8Bright
235.8Bright
245.8Bright
255.8Bright
265.8Bright
275.8Bright
285.8Bright
295.8Bright
305.8Bright
315.8Bright
Planning a trip in May

Hazard calendar for Nanto-shi

In seasonPeak

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

Nanto-shi 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 Nanto-shi?

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

5.6
Sightseeing
1st-best month of the year
3.3
Beach & pool
5th-best month of the year

May is a reasonable time to visit Nanto-shi for sightseeing.

What to pack for Nanto-shi in May

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

In May, Nanto-shi sees daytime highs around 21°C and nights near 10°C. Pack rain gear. Worth having: sun protection. About 15 days see rain.

rain gearsun protection

Sea temperature near Nanto-shi in May

The nearest coast averages about 16°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 March near 11°C.

It's comfortable for a long swim from Jun 17 to Nov 3 — about 4.6 months when the water holds above 20°C.

10°20°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan13Bracing
Feb11Bracing
Mar11Bracing
Apr12Bracing
May16Cool
Jun20Cool
Jul24Refreshing
Aug27Warm
Sep25Warm
Oct22Refreshing
Nov19Cool
Dec16Cool

UV index in Nanto-shi in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 9 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Nanto-shi peaks around July 20 at about 10 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 21 at about 2 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 10 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highModerateJul 20UV 10Dec 21UV 2
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar5Moderate
Apr7High
May9Very high
Jun10Very high
Jul10Very high
Aug10Very high
Sep9Very high
Oct6High
Nov3Moderate
Dec2Moderate

Air quality in Nanto-shi 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 Nanto-shi is worst in April — around 21 µg/m³ PM2.5 (moderate), about 2.4× the cleanest month (December, 9 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodApr 1621 µg/m³Dec 139 µg/m³
PM2.5 (µg/m³)Level
Jan10Good
Feb13Moderate
Mar20Moderate
Apr21Moderate
May20Moderate
Jun18Moderate
Jul14Moderate
Aug12Good
Sep10Good
Oct10Good
Nov10Good
Dec9Good
Location & terrain

Where is Nanto-shi?

Nanto-shi sits at 36.6°N, 136.9°E, 70 m above sea level, in Japan. The nearest listed city is Fukumitsu, 4.0 km away.

Topography around Nanto-shi

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

Within 3 km, the terrain around Nanto-shi has only modest variations in elevation — a maximum elevation change of 62 m around an average of 72 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 1,138 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,132 m.

The land around Nanto-shi is covered by cropland (72%) and artificial surfaces (20%) within 3 km, trees (63%) and cropland (25%) within 16 km, and trees (57%) and water (30%) within 80 km.

3 km
62 m
16 km
1,138 m
80 km
3,132 m
treesgrasslandcroplandartificial surfaceswater
May weather nearby: Fukumitsu 4.0 km · Tonami 6.0 km · Nanto 6.0 km · Oyabe 12 km · Tsubata 19 km · Yatsuomachi-higashikumisaka 20 km · Takaoka 22 km · Mukai-awagasaki 25 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 Nanto-shi (36.5692°, 136.9116°, elevation 70 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).