Itō weather in May

In May, Itō sees average daytime highs of 21°C and overnight lows near 15°C, with 188 mm of rain across 12.2 wet days and about 13.8 hours of daylight. It is the 5th-warmest and 5th-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 23% of the time in May, and the air most often feels dry.

Daylight stretches from about 13 h 24 min at the start of May to 14 h 12 min by month's end. Set against the rest of the year, May is Itō's 10th-clearest and 10th-windiest month. For the whole year in context, see Itō's year-round climate.

Daytime high
21°
5th warmest
Overnight low
15°
7th coldest
Rainfall
188 mm
12.2 wet days
Daylight
13 h 48 min
4:45 AM – 6:35 PM
Cloud cover
69%
10th clearest
Wind
9 km/h
10th windiest
Solar energy
5.45 kWh/m²
Travel score
5.9
out of 10

Itō is city in Shizuoka Prefecture, Japan.

Density
554/km²
people per km²
Founded
1947

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 Itō reaches about 21°C in the afternoon and slips back to 15°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 17°C and 24°C. Set against its neighbours, May runs about 4°C warmer than April and about 3°C cooler than June.

10°15°20°25°151015202531
Avg high (°C)Avg low (°C)
11913
21913
31913
41913
51913
62013
72013
82014
92014
102014
112014
122014
132014
142014
152114
162115
172115
182115
192115
202115
212115
222115
232115
242216
252216
262216
272216
282216
292216
302216
312216

How May really feels in Itō

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.

Itō 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
Jan / 927.91.39.91.9
Feb / 1059.11.410.72.0
Mar12° / 17913.90.811.73.0
Apr17° / 10°17212.5012.94.9
May21° / 15°18812.2013.85.9
Jun24° / 18°24916.2014.35.5
Jul27° / 22°22815.2014.15.3
Aug29° / 24°15614.5013.35.1
Sep26° / 21°23315.1012.25.8
Oct21° / 16°24713.1011.16.0
Nov16° / 11°13410.1010.25.1
Dec11° / 838.20.19.73.2

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 23% 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 67%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14060
24060
34060
43961
53862
63763
73664
83565
93466
103367
113268
123268
133268
143268
153169
163169
173268
183268
193169
203268
213268
223268
233268
243268
253268
263268
273169
283169
293070
303070
313070

Chance of precipitation in May

Any precipitation

Itō gets around 188 mm of rain over 12.2 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 39% and peaks near 41% on the wettest days.

0%10%20%30%40%50%151015202531
Rain chance (%)
138
238
338
438
538
638
739
839
939
1039
1140
1240
1340
1440
1541
1641
1740
1840
1940
2040
2140
2239
2339
2439
2539
2639
2739
2839
2939
3040
3140

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 42% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
1682651
2672751
3652861
4642961
5623071
6613171
7583381
8573481
9543592
10533692
115137102
125038102
134839112
144740112
154541122
164342132
174143142
183944152
193744172
203545182
213345192
223146212
232946223
242746243
252546253
262446273
272245294
282045314
291944324
301743345
311643366

Wind in May

Winds average 9 km/h in May.

Across May, daily wind ranges from about 9 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
289calm
299calm
309calm
319calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 13 h 24 min at the start of May to 14 h 12 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 4:59 AM to 4:36 AM, and sunset from 6:23 PM to 6:46 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.44:596:23
213.44:586:23
313.54:576:24
413.54:566:25
513.54:556:26
613.54:546:27
713.64:536:27
813.64:526:28
913.64:516:29
1013.74:506:30
1113.74:496:31
1213.74:486:32
1313.74:476:32
1413.84:476:33
1513.84:466:34
1613.84:456:35
1713.94:446:36
1813.94:446:36
1913.94:436:37
2013.94:426:38
2114.04:426:39
2214.04:416:39
2314.04:406:40
2414.04:406:41
2514.04:396:42
2614.14:396:42
2714.14:386:43
2814.14:386:44
2914.14:376:44
3014.14:376:45
3114.24:366:46

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.45 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 2.44 kWh/m² to a high of 5.45 kWh/m² in May across the year — May's 5.45 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.4Bright
25.4Bright
35.4Bright
45.4Bright
55.4Bright
65.4Bright
75.4Bright
85.4Bright
95.4Bright
105.4Bright
115.4Bright
125.4Bright
135.4Bright
145.4Bright
155.4Bright
165.4Bright
175.5Bright
185.5Bright
195.5Bright
205.5Bright
215.5Bright
225.5Bright
235.5Bright
245.5Bright
255.5Bright
265.5Bright
275.5Bright
285.5Bright
295.5Bright
305.4Bright
315.4Bright
Planning a trip in May

Hazard calendar for Itō

In seasonPeak

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

Itō 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 Itō?

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

5.9
Sightseeing
2nd-best month of the year
3.4
Beach & pool
6th-best month of the year

May is a reasonable time to visit Itō for sightseeing.

What to pack for Itō in May

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

In May, Itō sees daytime highs around 21°C and nights near 15°C. Worth packing: rain gear and sun protection. About 12 days see rain.

rain gearsun protection

Sea temperature near Itō 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 offshore is warmest in August at about 26°C and coldest in February near 16°C.

It's comfortable for a long swim from May 29 to Nov 29 — about 6.1 months when the water holds above 20°C.

15°20°25°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan17Cool
Feb16Cool
Mar16Cool
Apr17Cool
May19Cool
Jun21Refreshing
Jul24Warm
Aug26Warm
Sep25Warm
Oct23Refreshing
Nov21Refreshing
Dec19Cool

UV index in Itō 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 Itō peaks around August 10 at about 10 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 23 at about 3 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highExtremeVery highHighModerateAug 10UV 10Dec 23UV 3
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar5Moderate
Apr7High
May9Very high
Jun10Very high
Jul10Extreme
Aug10Extreme
Sep9Very high
Oct6High
Nov4Moderate
Dec3Moderate

Air quality in Itō 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 Itō is worst in April — around 23 µg/m³ PM2.5 (moderate), about 2.4× the cleanest month (December, 10 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodApr 1623 µg/m³Dec 1610 µg/m³
PM2.5 (µg/m³)Level
Jan12Good
Feb20Moderate
Mar20Moderate
Apr23Moderate
May20Moderate
Jun17Moderate
Jul13Moderate
Aug12Good
Sep12Good
Oct12Good
Nov11Good
Dec10Good
Location & terrain

Where is Itō?

Itō sits at 35.0°N, 139.1°E, 92 m above sea level, in Japan. The nearest listed city is Izu, 12 km away.

Topography around Itō

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

Within 3 km, the terrain around Itō has significant variations in elevation — a maximum elevation change of 588 m around an average of 205 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,391 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,746 m.

The land around Itō is covered by trees (76%) within 3 km, trees (51%) and water (43%) within 16 km, and water (57%) and trees (33%) within 80 km.

3 km
588 m
16 km
1,391 m
80 km
3,746 m
treesgrasslandcroplandartificial surfaceswater
May weather nearby: Izu 12 km · Atami 14 km · Izunokuni 14 km · Shuzenji 15 km · Kamizawa 19 km · Yugawara 20 km · Mishima 23 km · Fushimi 24 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 Itō (34.9667°, 139.0833°, 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).