Izumo weather in August

In August, Izumo sees average daytime highs of 30°C and overnight lows near 24°C, with 149 mm of rain across 13.9 wet days and about 13.3 hours of daylight. It is the 1st-warmest and 4th-wettest month of the year here.

Highs ease over the month, from about 30°C in the first days to 29°C by the end. The sky is clear or mostly clear about 28% of the time in August, and the air most often feels oppressive.

Daylight stretches from about 13 h 48 min at the start of August to 12 h 48 min by month's end. Set against the rest of the year, August is Izumo's 5th-clearest and 11th-windiest month. For the whole year in context, see Izumo's year-round climate.

Daytime high
30°
1st warmest
Overnight low
24°
12th coldest
Rainfall
149 mm
13.9 wet days
Daylight
13 h 18 min
5:33 AM – 6:53 PM
Cloud cover
62%
5th clearest
Wind
10 km/h
11th windiest
Solar energy
5.2 kWh/m²
Travel score
4.6
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 August

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 30°C in the first days to 29°C by the end.

A typical August day in Izumo reaches about 30°C in the afternoon and slips back to 24°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 26°C and 33°C. Set against its neighbours, August runs about 2°C warmer than July and about 4°C warmer than September.

15°20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
13025
23025
33025
43025
53025
63025
73025
83025
93025
103025
113025
123025
133025
143025
153024
163024
173024
183024
193024
203024
213024
222924
232924
242924
252924
262923
272923
282923
292923
302923
312823

How August really feels in Izumo

Once humidity and wind are folded in, August averages 24 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
24
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

The story in August is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Izumo weather by month

How August compares with the rest of the year at a glance. August is the 1st-warmest and 4th-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 August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 28% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 15% of August, with mostly cloudy or overcast conditions the remaining 56%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14753
24654
34654
44654
54654
64654
74555
84555
94555
104555
114357
124258
134258
144258
154357
164357
174357
184456
194456
204456
214456
224456
234357
244357
254357
264357
274258
284258
294159
304060
314060

Chance of precipitation in August

Any precipitation

Izumo gets around 149 mm of rain over 13.9 wet days in August. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 45% and peaks near 48% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%151015202531
Rain chance (%)
140
240
340
440
541
641
742
842
943
1044
1145
1246
1347
1447
1548
1648
1748
1848
1948
2048
2148
2248
2348
2447
2547
2647
2747
2848
2948
3048
3148

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, August lands in the oppressive band about 66% of days. Sticky, muggy-or-worse air turns up on roughly 97% of them.

0%25%50%75%100%151015202531
Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
101107415
201107316
301107316
401107217
500107317
600117118
700117118
800117118
901117018
1001117018
1101126918
1201126918
1301126918
1401136917
1501136917
1611146816
1712156616
1812166615
1912176614
2013186513
2113206412
2213216411
2314226310
241424629
251525618
261627597
271628596
281730575
291831555
301932544
3111034523

Wind in August

Winds average 10 km/h in August.

Across August, daily wind ranges from about 10 km/h on the calmest days to 11 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
111calm
211calm
311calm
410calm
510calm
610calm
710calm
810calm
910calm
1010calm
1110calm
1210calm
1310calm
1410calm
1510calm
1610calm
1710calm
1810calm
1910calm
2010calm
2110calm
2210calm
2310calm
2410calm
2510calm
2610calm
2710calm
2810calm
2910calm
3010calm
3110calm

Sunrise & sunset in August

DaylightNight

Daylight runs from about 13 h 48 min at the start of August to 12 h 48 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 60 minutes over August. Sunrise moves from 5:21 AM to 5:44 AM, and sunset from 7:09 PM to 6:34 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.85:217:09
213.85:227:08
313.75:227:07
413.75:237:06
513.75:247:05
613.75:257:04
713.65:267:03
813.65:267:02
913.65:277:01
1013.55:287:00
1113.55:296:59
1213.55:306:58
1313.45:306:57
1413.45:316:56
1513.45:326:55
1613.35:336:53
1713.35:336:52
1813.35:346:51
1913.25:356:50
2013.25:366:48
2113.25:376:47
2213.15:376:46
2313.15:386:45
2413.15:396:43
2513.05:406:42
2613.05:416:41
2713.05:416:39
2812.95:426:38
2912.95:436:36
3012.95:446:35
3112.85:446:34

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 5.2 kWh/m².

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 — August's 5.2 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.6Bright
25.6Bright
35.6Bright
45.5Bright
55.5Bright
65.5Bright
75.5Bright
85.5Bright
95.4Bright
105.4Bright
115.3Bright
125.3Bright
135.3Bright
145.3Bright
155.2Bright
165.2Bright
175.2Bright
185.1Bright
195.1Bright
205.1Bright
215.0Bright
225.0Bright
235.0Bright
244.9Bright
254.9Bright
264.9Bright
274.8Bright
284.8Bright
294.7Bright
304.7Bright
314.7Bright
Planning a trip in August

Hazard calendar for Izumo

In seasonPeak

In August, 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 August a good time to visit Izumo?

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

4.6
Sightseeing
7th-best month of the year
6.2
Beach & pool
1st-best month of the year

August is a reasonable time to visit Izumo for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Izumo in August

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

In August, Izumo sees daytime highs around 30°C and nights near 24°C. Pack light clothes and rain gear. Worth having: sun protection. About 14 days see rain.

light clothesrain gearsun protection

Sea temperature near Izumo in August

The nearest coast averages about 27°C in August — 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 August

LowModerateHighVery highExtreme

Clear-sky midday UV in August 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 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 August

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where August 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
August 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).