Ijūin weather in October

In October, Ijūin sees average daytime highs of 25°C and overnight lows near 18°C, with 110 mm of rain across 9 wet days and about 11.2 hours of daylight. It is the 5th-warmest and 9th-wettest month of the year here.

Highs ease over the month, from about 27°C in the first days to 23°C by the end. The sky is clear or mostly clear about 45% of the time in October, and the air most often feels humid.

Daylight stretches from about 11 h 42 min at the start of October to 10 h 48 min by month's end. Set against the rest of the year, October is Ijūin's 1st-clearest and 10th-windiest month. For the whole year in context, see Ijūin's year-round climate.

Daytime high
25°
5th warmest
Overnight low
18°
8th coldest
Rainfall
110 mm
9 wet days
Daylight
11 h 12 min
6:27 AM – 5:40 PM
Cloud cover
48%
1st clearest
Wind
9 km/h
10th windiest
Solar energy
3.76 kWh/m²
Travel score
7.1
out of 10

Temperature in October

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 27°C in the first days to 23°C by the end.

A typical October day in Ijūin reaches about 25°C in the afternoon and slips back to 18°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 22°C and 28°C. Set against its neighbours, October runs about 4°C cooler than September and about 5°C warmer than November.

10°15°20°25°30°151015202531
Avg high (°C)Avg low (°C)
12721
22720
32720
42720
52720
62620
72620
82619
92619
102619
112619
122619
132518
142518
152518
162518
172518
182517
192417
202417
212417
222417
232416
242316
252316
262316
272316
282316
292315
302215
312215

How October really feels in Ijūin

Once humidity and wind are folded in, October 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

October sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Ijūin weather by month

How October compares with the rest of the year at a glance. October is the 5th-warmest and 9th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan12° / 82910.23.4
Feb13° / 1029.610.83.7
Mar16° / 15412.911.84.9
Apr21° / 13°17611.612.86.0
May24° / 17°19711.613.66.4
Jun27° / 21°48819.8144.7
Jul30° / 25°30019.913.93.7
Aug31° / 25°16717.213.23.6
Sep29° / 23°20214.712.24.9
Oct25° / 18°110911.27.1
Nov20° / 12°1128.910.46.4
Dec14° / 857.7104.6

Cloud cover in October

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 45% of the time in October, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 14% of October, with mostly cloudy or overcast conditions the remaining 41%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15050
25149
35149
45248
55347
65545
75644
85743
95842
105941
116040
126139
136139
146238
156238
166238
176337
186337
196436
206337
216337
226238
236238
246139
256040
266040
275941
285941
295941
305842
315842

Chance of precipitation in October

Any precipitation

Ijūin gets around 110 mm of rain over 9 wet days in October. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 30% and peaks near 37% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%40%50%151015202531
Rain chance (%)
137
236
336
435
534
633
733
832
931
1031
1130
1229
1329
1428
1528
1628
1728
1827
1927
2027
2127
2227
2327
2427
2527
2627
2727
2827
2927
3027
3127

Humidity in October

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, October lands in the humid band about 27% of days. Sticky, muggy-or-worse air turns up on roughly 26% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
13132930213
24143030203
34153029193
45163129173
55173128162
66193127152
77203226142
88213224132
910223223121
1011243222111
1113253121101
121426312091
131627301981
141827291870
152028291760
162128281660
172329271650
182529271550
192729261440
202929251340
213129241230
223329241230
233429231120
243629221120
253829211020
264028211020
274128201010
28432720910
29442719910
30452719810
31462619810

Wind in October

Winds average 9 km/h in October.

Across October, daily wind ranges from about 9 km/h on the calmest days to 9 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
19calm
29calm
39calm
49calm
59calm
69calm
79calm
89calm
99calm
109calm
119calm
129calm
139calm
149calm
159calm
169calm
179calm
189calm
199calm
209calm
219calm
229calm
239calm
249calm
259calm
269calm
279calm
289calm
299calm
309calm
319calm

Sunrise & sunset in October

DaylightNight

Daylight runs from about 11 h 42 min at the start of October to 10 h 48 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 54 minutes over October. Sunrise moves from 6:17 AM to 6:39 AM, and sunset from 5:58 PM to 5:25 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.76:175:58
211.76:175:57
311.66:185:56
411.66:195:54
511.66:195:53
611.56:205:52
711.56:215:51
811.56:215:49
911.46:225:48
1011.46:235:47
1111.46:235:46
1211.36:245:44
1311.36:255:43
1411.36:265:42
1511.26:265:41
1611.26:275:40
1711.26:285:39
1811.16:295:38
1911.16:295:36
2011.16:305:35
2111.16:315:34
2211.06:325:33
2311.06:325:32
2411.06:335:31
2510.96:345:30
2610.96:355:29
2710.96:365:28
2810.86:375:27
2910.86:375:27
3010.86:385:26
3110.86:395:25

Solar energy in October

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in October, about 3.76 kWh/m².

For context, solar energy here swings from a low near 2.47 kWh/m² to a high of 5.06 kWh/m² in May across the year — October's 3.76 kWh/m² falls in the middle.

01234151015202531
Solar energy (kWh/m²)Level
14.0Moderate
24.0Moderate
33.9Moderate
43.9Moderate
53.9Moderate
63.9Moderate
73.9Moderate
83.9Moderate
93.9Moderate
103.9Moderate
113.9Moderate
123.9Moderate
133.8Moderate
143.8Moderate
153.8Moderate
163.8Moderate
173.8Moderate
183.7Moderate
193.7Moderate
203.7Moderate
213.7Moderate
223.6Moderate
233.6Moderate
243.6Moderate
253.5Moderate
263.5Moderate
273.5Moderate
283.4Moderate
293.4Moderate
303.4Moderate
313.3Moderate
Planning a trip in October

Hazard calendar for Ijūin

In seasonPeak

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

Ijūin sits in the Pacific typhoon belt; the season peaks July–October.

Ijūin's rainy season runs June–July, when most of the year's rain falls.

Pacific typhoon
Rainy season
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is October a good time to visit Ijūin?

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

7.1
Sightseeing
1st-best month of the year
6.2
Beach & pool
1st-best month of the year

October is one of the better times to visit Ijūin for general sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Ijūin in October

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

In October, Ijūin sees daytime highs around 25°C and nights near 18°C. Worth packing: light clothes and rain gear. About 9 days see rain.

light clothesrain gear

Sea temperature near Ijūin in October

The nearest coast averages about 25°C in October — 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 28°C and coldest in February near 17°C.

It's comfortable for a long swim from May 4 to Dec 16 — about 7.5 months when the water holds above 20°C.

15°20°25°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan18Cool
Feb17Cool
Mar18Cool
Apr19Cool
May21Refreshing
Jun23Refreshing
Jul26Warm
Aug28Tropical
Sep27Warm
Oct25Warm
Nov23Refreshing
Dec20Refreshing

UV index in Ijūin in October

LowModerateHighVery highExtreme

Clear-sky midday UV in October peaks around 6 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Ijūin peaks around July 10 at about 11 (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 — every month of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highExtremeVery highHighModerateJul 10UV 11Dec 23UV 3
UV index (midday)Level
Jan3Moderate
Feb5Moderate
Mar7High
Apr8Very high
May8Very high
Jun11Extreme
Jul11Extreme
Aug9Very high
Sep10Very high
Oct6High
Nov5Moderate
Dec3Moderate

Air quality in Ijūin in October

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where October falls, not just the annual average.

Air quality in Ijūin is worst in April — around 23 µg/m³ PM2.5 (moderate), about 1.9× the cleanest month (October, 12 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateApr 1423 µg/m³Oct 1012 µg/m³
PM2.5 (µg/m³)Level
Jan15Moderate
Feb19Moderate
Mar22Moderate
Apr23Moderate
May21Moderate
Jun17Moderate
Jul12Moderate
Aug14Moderate
Sep12Moderate
Oct12Moderate
Nov14Moderate
Dec13Moderate
Location & terrain

Where is Ijūin?

Ijūin sits at 31.6°N, 130.4°E, 93 m above sea level, in Japan. The nearest listed city is Umeki, 6.0 km away.

Topography around Ijūin

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

Within 3 km, the terrain around Ijūin has significant variations in elevation — a maximum elevation change of 261 m around an average of 127 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 681 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,644 m.

The land around Ijūin is covered by trees (75%) within 3 km, trees (64%) and water (20%) within 16 km, and water (54%) and trees (39%) within 80 km.

3 km
261 m
16 km
681 m
80 km
1,644 m
treesgrasslandcroplandartificial surfaceswater
October weather nearby: Umeki 6.0 km · Kagoshima 15 km · Ichikikushikino 16 km · Kushikino 17 km · Kaseda-shirakame 24 km · Sendai 24 km · Aira 25 km · Minamisatsuma 28 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 Ijūin (31.6167°, 130.4°, elevation 93 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).