Izumo weather in May

In May, Izumo sees average daytime highs of 21°C and overnight lows near 14°C, with 117 mm of rain across 10.5 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 23°C by the end. The sky is clear or mostly clear about 31% 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 Izumo's 4th-clearest and 7th-windiest month. For the whole year in context, see Izumo's year-round climate.

Daytime high
21°
5th warmest
Overnight low
14°
7th coldest
Rainfall
117 mm
10.5 wet days
Daylight
13 h 54 min
5:09 AM – 7:01 PM
Cloud cover
61%
4th clearest
Wind
11 km/h
7th windiest
Solar energy
5.74 kWh/m²
Travel score
6.4
out of 10

Izumo is city in Shimane Prefecture, Japan.

Density
277/km²
people per km²
Founded
2005

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 Izumo reaches about 21°C in the afternoon and slips back to 14°C overnight — a 7°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 5°C warmer than April and about 3°C cooler than June.

10°15°20°25°30°151015202531
Avg high (°C)Avg low (°C)
11912
21912
31912
42013
52013
62013
72013
82013
92013
102013
112013
122114
132114
142114
152114
162114
172114
182114
192115
202215
212215
222215
232215
242215
252215
262216
272216
282216
292316
302316
312316

How May really feels in Izumo

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.

Izumo 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 / 9617.37.89.90.9
Feb / 8714.66.210.71.2
Mar11° / 11614.12.111.72.6
Apr16° / 10410.7012.95.1
May21° / 14°11710.5013.86.4
Jun24° / 19°16012.7014.36.1
Jul28° / 23°21315.2014.15.0
Aug30° / 24°14913.9013.34.6
Sep26° / 20°19013.6012.26.0
Oct21° / 15°10310.3011.16.5
Nov15° / 8711.10.110.14.6
Dec10° / 10316.34.59.72.0

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 31% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 11% of May, with mostly cloudy or overcast conditions the remaining 58%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14654
24654
34654
44555
54555
64456
74456
84258
94159
104159
114060
124159
134159
144159
154159
164060
174159
184159
194159
204159
214159
224258
234258
244258
254258
264159
274159
284159
294060
304060
313961

Chance of precipitation in May

Any precipitation

Izumo gets around 117 mm of rain over 10.5 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 33% and peaks near 34% on the wettest days.

0%10%20%30%40%151015202531
Rain chance (%)
132
232
332
432
532
633
733
833
934
1034
1134
1234
1334
1434
1534
1634
1734
1834
1934
2034
2134
2233
2333
2433
2533
2632
2732
2832
2932
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 60% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
1821440
2821440
3811540
4791650
5771751
6761851
7751951
8742051
9722161
10712261
11702361
12692461
13682561
14672661
15652771
16642871
17632971
18603181
19583291
20573391
215534101
225335111
235036131
244837142
254538152
264339172
274039192
283740212
293540233
303241253
312941274

Wind in May

Winds average 11 km/h in May.

Across May, daily wind ranges from about 10 km/h on the calmest days to 12 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
112light breeze
212light breeze
312light breeze
412light breeze
512calm
612calm
712calm
812calm
912calm
1012calm
1112calm
1212calm
1312calm
1411calm
1511calm
1611calm
1711calm
1811calm
1911calm
2011calm
2111calm
2211calm
2311calm
2410calm
2510calm
2610calm
2710calm
2810calm
2910calm
3010calm
3110calm

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 5:24 AM to 5:01 AM, and sunset from 6:48 PM to 7:12 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.45:246:48
213.45:236:49
313.55:226:50
413.55:216:51
513.55:206:52
613.65:186:53
713.65:176:53
813.65:176:54
913.75:166:55
1013.75:156:56
1113.75:146:57
1213.75:136:58
1313.85:126:58
1413.85:116:59
1513.85:107:00
1613.95:097:01
1713.95:097:02
1813.95:087:02
1913.95:077:03
2014.05:077:04
2114.05:067:05
2214.05:057:06
2314.05:057:06
2414.05:047:07
2514.15:037:08
2614.15:037:09
2714.15:027:09
2814.15:027:10
2914.25:027:11
3014.25:017:11
3114.25:017:12

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.74 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 2.04 kWh/m² to a high of 5.74 kWh/m² in May across the year — May's 5.74 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.6Bright
25.6Bright
35.6Bright
45.6Bright
55.6Bright
65.6Bright
75.6Bright
85.7Bright
95.7Bright
105.7Bright
115.7Bright
125.7Bright
135.7Bright
145.7Bright
155.7Bright
165.8Bright
175.8Bright
185.8Bright
195.8Bright
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 Izumo

In seasonPeak

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

Izumo 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 Izumo?

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

6.4
Sightseeing
2nd-best month of the year
3.9
Beach & pool
5th-best month of the year

May is a reasonable time to visit Izumo for sightseeing.

What to pack for Izumo in May

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

In May, Izumo sees daytime highs around 21°C and nights near 14°C. Worth packing: rain gear and sun protection. About 11 days see rain.

rain gearsun protection

Sea temperature near Izumo in May

The nearest coast averages about 17°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 13 km away) is warmest in August at about 27°C and coldest in February near 13°C.

It's comfortable for a long swim from Jun 12 to Nov 15 — about 5.2 months when the water holds above 20°C.

10°15°20°25°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan15Bracing
Feb13Bracing
Mar13Bracing
Apr15Bracing
May17Cool
Jun21Refreshing
Jul24Warm
Aug27Warm
Sep25Warm
Oct23Refreshing
Nov20Refreshing
Dec17Cool

UV index in Izumo 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 Izumo peaks around July 18 at about 10 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 23 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 highExtremeVery highModerateJul 18UV 10Dec 23UV 2
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar5High
Apr7Very high
May8Very high
Jun9Very high
Jul11Extreme
Aug10Very high
Sep9Very high
Oct6High
Nov4Moderate
Dec2Moderate

Air quality in Izumo 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 Izumo is worst in April — around 22 µg/m³ PM2.5 (moderate), about 2.3× the cleanest month (October, 10 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodApr 1222 µg/m³Oct 1310 µg/m³
PM2.5 (µg/m³)Level
Jan14Moderate
Feb16Moderate
Mar21Moderate
Apr22Moderate
May20Moderate
Jun17Moderate
Jul13Moderate
Aug12Good
Sep11Good
Oct10Good
Nov12Good
Dec11Good
Location & terrain

Where is Izumo?

Izumo sits at 35.4°N, 132.8°E, 6 m above sea level, in Japan. The nearest listed city is Hiratachō, 9.0 km away.

Topography around Izumo

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

Within 3 km, the terrain around Izumo has only modest variations in elevation — a maximum elevation change of 152 m around an average of 16 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 567 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,689 m.

The land around Izumo is covered by artificial surfaces (52%) and cropland (22%) within 3 km, trees (54%) and water (25%) within 16 km, and trees (52%) and water (44%) within 80 km.

3 km
152 m
16 km
567 m
80 km
1,689 m
treesgrasslandcroplandartificial surfacesbare terrainwater
May weather nearby: Hiratachō 9.0 km · Unnan 18 km · Matsue 29 km · Ōdachō-ōda 31 km · Yasugichō 44 km · Sakaiminato 46 km · Yonago 52 km · Shōbara 62 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 Izumo (35.3667°, 132.7667°, elevation 6 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).