Shimo’ochiai weather in October

In October, Shimo’ochiai sees average daytime highs of 21°C and overnight lows near 15°C, with 209 mm of rain across 12.9 wet days and about 11.1 hours of daylight. It is the 6th-warmest and 1st-wettest month of the year here.

Highs ease over the month, from about 24°C in the first days to 19°C by the end. The sky is clear or mostly clear about 33% of the time in October, and the air most often feels dry.

Daylight stretches from about 11 h 36 min at the start of October to 10 h 36 min by month's end. Set against the rest of the year, October is Shimo’ochiai's 6th-clearest and 10th-windiest month. For the whole year in context, see Shimo’ochiai's year-round climate.

Daytime high
21°
6th warmest
Overnight low
15°
7th coldest
Rainfall
209 mm
12.9 wet days
Daylight
11 h 06 min
5:54 AM – 4:59 PM
Cloud cover
60%
6th clearest
Wind
11 km/h
10th windiest
Solar energy
2.87 kWh/m²
Travel score
6.1
out of 10

Temperature in October

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 24°C in the first days to 19°C by the end.

A typical October day in Shimo’ochiai 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 18°C and 25°C. Set against its neighbours, October runs about 6°C cooler than September and about 5°C warmer than November.

10°15°20°25°30°151015202531
Avg high (°C)Avg low (°C)
12418
22418
32418
42318
52317
62317
72317
82317
92317
102317
112216
122216
132216
142216
152215
162115
172115
182115
192115
202114
212114
222014
232014
242014
252013
262013
272013
282013
291913
301912
311912

How October really feels in Shimo’ochiai

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.

Shimo’ochiai weather by month

How October compares with the rest of the year at a glance. October is the 6th-warmest and 1st-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / 676.91.29.92.1
Feb10° / 627.51.510.62.4
Mar13° / 11311.60.811.73.7
Apr18° / 10°11311.4012.95.5
May23° / 15°12911.8013.96.4
Jun25° / 19°15913.6014.45.8
Jul29° / 23°14912.9014.24.9
Aug31° / 25°11010.8013.44.5
Sep27° / 21°18013.6012.25.6
Oct21° / 15°20912.9011.16.1
Nov16° / 919.8010.15.3
Dec12° / 597.50.29.63.3

Cloud cover in October

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 33% of the time in October.

Beyond those clear spells, partly cloudy skies cover about 14% of October, with mostly cloudy or overcast conditions the remaining 53%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13862
23961
34060
44159
54159
64159
74357
84357
94357
104357
114456
124456
134456
144555
154555
164654
174753
184852
194852
204951
214951
225050
235149
245248
255347
265347
275446
285545
295644
305743
315743

Chance of precipitation in October

Any precipitation

Shimo’ochiai gets around 209 mm of rain over 12.9 wet days in October, the wettest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 41% and peaks near 46% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%151015202531
Rain chance (%)
146
246
345
445
545
645
745
844
944
1044
1144
1243
1343
1442
1542
1642
1741
1841
1941
2041
2140
2240
2339
2439
2538
2638
2737
2837
2936
3035
3135

Humidity in October

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, October lands in the dry band about 40% of days. Sticky, muggy-or-worse air turns up on roughly 9% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1132338215
2142438204
3152538194
4172537183
5182637173
6192736162
7212834152
8222933142
9243031131
10263130121
11283228111
12303426101
1332352491
1434362281
1536362070
1638361870
1741371760
1843361550
1946361440
2048361240
2151351130
2253351020
235534920
245634910
255833810
266032710
276230710
286429610
296628600
306926500
317025500

Wind in October

Winds average 11 km/h in October.

Across October, 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
112calm
212calm
312calm
412calm
512calm
612calm
712calm
812calm
912calm
1012calm
1112calm
1212calm
1311calm
1411calm
1511calm
1611calm
1711calm
1811calm
1911calm
2011calm
2111calm
2211calm
2311calm
2411calm
2511calm
2611calm
2711calm
2811calm
2911calm
3010calm
3110calm

Sunrise & sunset in October

DaylightNight

Daylight runs from about 11 h 36 min at the start of October to 10 h 36 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 60 minutes over October. Sunrise moves from 5:41 AM to 6:08 AM, and sunset from 5:19 PM to 4:41 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.65:415:19
211.65:425:18
311.65:435:17
411.55:435:15
511.55:445:14
611.55:455:12
711.45:465:11
811.45:475:09
911.35:485:08
1011.35:495:07
1111.35:495:05
1211.25:505:04
1311.25:515:03
1411.25:525:01
1511.15:535:00
1611.15:544:59
1711.05:554:57
1811.05:564:56
1911.05:574:55
2010.95:584:54
2110.95:584:52
2210.95:594:51
2310.86:004:50
2410.86:014:49
2510.86:024:48
2610.76:034:47
2710.76:044:45
2810.76:054:44
2910.66:064:43
3010.66:074:42
3110.66:084:41

Solar energy in October

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in October, about 2.87 kWh/m².

For context, solar energy here swings from a low near 2.33 kWh/m² to a high of 5.07 kWh/m² in May across the year — October's 2.87 kWh/m² falls in the middle.

01234151015202531
Solar energy (kWh/m²)Level
13.1Moderate
23.1Moderate
33.1Moderate
43.0Moderate
53.0Moderate
63.0Moderate
73.0Moderate
83.0Moderate
93.0Moderate
102.9Moderate
112.9Moderate
122.9Moderate
132.9Moderate
142.9Moderate
152.9Moderate
162.9Moderate
172.9Moderate
182.9Moderate
192.8Moderate
202.8Moderate
212.8Moderate
222.8Moderate
232.8Moderate
242.8Moderate
252.8Moderate
262.8Moderate
272.8Moderate
282.8Moderate
292.8Moderate
302.8Moderate
312.8Moderate
Planning a trip in October

Hazard calendar for Shimo’ochiai

In seasonPeak

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

Shimo’ochiai 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 October a good time to visit Shimo’ochiai?

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

6.1
Sightseeing
2nd-best month of the year
4.0
Beach & pool
6th-best month of the year

October is a reasonable time to visit Shimo’ochiai for sightseeing.

What to pack for Shimo’ochiai in October

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

In October, Shimo’ochiai sees daytime highs around 21°C and nights near 15°C. Worth packing: rain gear. About 13 days see rain.

rain gear

Sea temperature near Shimo’ochiai in October

The nearest coast averages about 22°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 19 km away) is warmest in August at about 26°C and coldest in February near 13°C.

It's comfortable for a long swim from Jun 7 to Nov 3 — about 4.9 months when the water holds above 20°C.

10°15°20°25°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan14Bracing
Feb13Bracing
Mar13Bracing
Apr15Cool
May18Cool
Jun21Refreshing
Jul23Refreshing
Aug26Warm
Sep25Warm
Oct22Refreshing
Nov19Cool
Dec16Cool

UV index in Shimo’ochiai 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 Shimo’ochiai peaks around July 20 at about 10 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near January 1 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 highModerateJul 20UV 10Jan 1UV 2
UV index (midday)Level
Jan2Moderate
Feb4Moderate
Mar4Moderate
Apr7High
May8Very high
Jun9Very high
Jul10Very high
Aug10Very high
Sep9Very high
Oct6High
Nov3Moderate
Dec2Moderate

Air quality in Shimo’ochiai 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 Shimo’ochiai is worst in April — around 26 µg/m³ PM2.5 (moderate), about 1.9× the cleanest month (December, 14 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateApr 1426 µg/m³Dec 1814 µg/m³
PM2.5 (µg/m³)Level
Jan15Moderate
Feb21Moderate
Mar25Moderate
Apr26Moderate
May24Moderate
Jun20Moderate
Jul17Moderate
Aug16Moderate
Sep16Moderate
Oct16Moderate
Nov16Moderate
Dec14Moderate
Location & terrain

Where is Shimo’ochiai?

Shimo’ochiai sits at 35.7°N, 139.7°E, 37 m above sea level, in Japan. The nearest listed city is Nagasaki, 2.0 km away.

Topography around Shimo’ochiai

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

Within 3 km, the terrain around Shimo’ochiai has only modest variations in elevation — a maximum elevation change of 63 m around an average of 33 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 85 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,092 m.

The land around Shimo’ochiai is covered by artificial surfaces (95%) within 3 km, artificial surfaces (85%) within 16 km, and trees (39%) and artificial surfaces (27%) within 80 km.

3 km
63 m
16 km
85 m
80 km
2,092 m
treesgrasslandcroplandartificial surfaceswater
October weather nearby: Nagasaki 2.0 km · Ikebukuro 2.0 km · Ōkubo 2.0 km · Ōtsuka 2.0 km · Sugamo 3.0 km · Shinjuku 3.0 km · Itabashi 3.0 km · Nakano 3.0 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 Shimo’ochiai (35.7202°, 139.702°, elevation 37 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).