Tsubame weather in May

In May, Tsubame sees average daytime highs of 21°C and overnight lows near 13°C, with 96 mm of rain across 12 wet days and about 14 hours of daylight. It is the 5th-warmest and 11th-wettest month of the year here.

Highs climb over the month, from about 19°C in the first days to 23°C by the end. The sky is clear or mostly clear about 29% 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 24 min by month's end. Set against the rest of the year, May is Tsubame's 4th-clearest and 8th-windiest month. For the whole year in context, see Tsubame's year-round climate.

Daytime high
21°
5th warmest
Overnight low
13°
7th coldest
Rainfall
96 mm
12 wet days
Daylight
14 hours
4:40 AM – 6:41 PM
Cloud cover
63%
4th clearest
Wind
9 km/h
8th windiest
Solar energy
5.6 kWh/m²
Travel score
6.2
out of 10

Tsubame is city in Niigata Prefecture, Japan.

Density
698/km²
people per km²
Founded
1954

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 23°C by the end.

A typical May day in Tsubame reaches about 21°C in the afternoon and slips back to 13°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 17°C and 26°C. Set against its neighbours, May runs about 5°C warmer than April and about 4°C cooler than June.

10°15°20°25°30°151015202531
Avg high (°C)Avg low (°C)
11910
21910
31910
41911
52011
62011
72011
82011
92012
102012
112012
122112
132112
142112
152113
162113
172113
182113
192213
202213
212213
222214
232214
242214
252214
262314
272314
282315
292315
302315
312315

How May really feels in Tsubame

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.

Tsubame weather by month

How May compares with the rest of the year at a glance. May is the 5th-warmest and 11th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / 17124.716.49.70.2
Feb / 1172013.110.50.4
Mar10° / 12219.36.311.71.8
Apr16° / 9213.80.612.94.4
May21° / 13°96120146.2
Jun25° / 18°11712.1014.66.3
Jul28° / 22°21415.8014.35.0
Aug30° / 23°15013.7013.54.6
Sep26° / 20°14014.3012.35.8
Oct20° / 13°14614.60115.7
Nov14° / 15618.60.4103.4
Dec / 18223.38.99.41.1

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 29% 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 57%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14456
24555
34555
44456
54456
64357
74258
84258
94159
104159
114159
124159
134060
144060
154159
164159
174159
184159
194258
204258
214357
224357
234456
244456
254456
264555
274555
284456
294456
304456
314456

Chance of precipitation in May

Any precipitation

Tsubame gets around 96 mm of rain over 12 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 38% and peaks near 42% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%40%50%151015202531
Rain chance (%)
139
239
339
439
540
640
740
841
941
1041
1141
1241
1342
1442
1541
1641
1741
1840
1939
2039
2138
2237
2336
2436
2535
2634
2734
2833
2933
3032
3132

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 66% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
1891010
2881110
3861310
4851410
5841510
6821620
7801820
8791920
9782020
10762130
11752230
12742330
13722440
14712540
15702640
16682750
17662860
18652960
19633070
20623080
21603190
225832100
235633110
245334121
255036141
264837151
274638161
284339171
294140191
303840211
313541221

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
310calm
410calm
510calm
610calm
710calm
810calm
910calm
1010calm
1110calm
129calm
139calm
149calm
159calm
169calm
179calm
189calm
199calm
209calm
219calm
229calm
239calm
249calm
259calm
269calm
279calm
288calm
298calm
308calm
318calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 13 h 30 min at the start of May to 14 h 24 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 54 minutes over May. Sunrise moves from 4:55 AM to 4:30 AM, and sunset from 6:28 PM to 6:53 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.54:556:28
213.64:546:28
313.64:536:29
413.64:526:30
513.74:516:31
613.74:506:32
713.74:496:33
813.84:486:34
913.84:466:35
1013.84:456:36
1113.94:446:37
1213.94:446:38
1313.94:436:39
1414.04:426:39
1514.04:416:40
1614.04:406:41
1714.14:396:42
1814.14:386:43
1914.14:376:44
2014.14:376:45
2114.24:366:45
2214.24:356:46
2314.24:356:47
2414.24:346:48
2514.34:336:49
2614.34:336:50
2714.34:326:50
2814.34:326:51
2914.34:316:52
3014.44:316:53
3114.44:306:53

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.6 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 1.64 kWh/m² to a high of 5.6 kWh/m² in May across the year — May's 5.6 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.4Bright
25.4Bright
35.4Bright
45.5Bright
55.5Bright
65.5Bright
75.5Bright
85.5Bright
95.5Bright
105.5Bright
115.5Bright
125.5Bright
135.5Bright
145.5Bright
155.5Bright
165.6Bright
175.6Bright
185.6Bright
195.7Bright
205.7Bright
215.7Bright
225.7Bright
235.8Bright
245.8Bright
255.8Bright
265.8Bright
275.8Bright
285.9Bright
295.9Bright
305.9Bright
315.9Bright
Planning a trip in May

Hazard calendar for Tsubame

In seasonPeak

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

Tsubame 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 Tsubame?

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

6.2
Sightseeing
2nd-best month of the year
3.8
Beach & pool
5th-best month of the year

May is a reasonable time to visit Tsubame for sightseeing.

What to pack for Tsubame in May

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

In May, Tsubame sees daytime highs around 21°C and nights near 13°C. Worth packing: rain gear and sun protection. About 12 days see rain.

rain gearsun protection

Sea temperature near Tsubame in May

The nearest coast averages about 15°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 24 km away) is warmest in August at about 26°C and coldest in March near 10°C.

It's comfortable for a long swim from Jun 22 to Oct 30 — about 4.3 months when the water holds above 20°C.

10°20°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan12Bracing
Feb10Bracing
Mar10Bracing
Apr11Bracing
May15Bracing
Jun19Cool
Jul23Refreshing
Aug26Warm
Sep25Warm
Oct22Refreshing
Nov18Cool
Dec15Cool

UV index in Tsubame 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 Tsubame peaks around August 12 at about 10 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 at about 2 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 9 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highModerateAug 12UV 10Dec 22UV 2
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar4Moderate
Apr6High
May8Very high
Jun8Very high
Jul9Very high
Aug10Very high
Sep8Very high
Oct5High
Nov3Moderate
Dec2Low

Air quality in Tsubame 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 Tsubame is worst in April — around 23 µg/m³ PM2.5 (moderate), about 2.3× the cleanest month (December, 10 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodApr 1723 µg/m³Dec 1610 µg/m³
PM2.5 (µg/m³)Level
Jan12Good
Feb15Moderate
Mar22Moderate
Apr23Moderate
May22Moderate
Jun19Moderate
Jul17Moderate
Aug14Moderate
Sep12Moderate
Oct12Good
Nov11Good
Dec10Good
Location & terrain

Where is Tsubame?

Tsubame sits at 37.7°N, 138.9°E, 8 m above sea level, in Japan. The nearest listed city is Yoshida-kasugachō, 4.0 km away.

Topography around Tsubame

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

Within 3 km, the terrain around Tsubame has only modest variations in elevation — a maximum elevation change of 17 m around an average of 8 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 626 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,137 m.

The land around Tsubame is covered by artificial surfaces (45%) and cropland (42%) within 3 km, cropland (46%) and trees (29%) within 16 km, and trees (49%) and water (39%) within 80 km.

3 km
17 m
16 km
626 m
80 km
2,137 m
treesgrasslandcroplandartificial surfacesbare terrainwater
May weather nearby: Yoshida-kasugachō 4.0 km · Sanjō 6.0 km · Kamo 10 km · Maki 10 km · Shirone 14 km · Mitsuke 15 km · Tochio-honchō 22 km · Muramatsu 22 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 Tsubame (37.6645°, 138.9252°, elevation 8 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).