Ōiso weather in October

In October, Ōiso sees average daytime highs of 20°C and overnight lows near 17°C, with 267 mm of rain across 15.5 wet days and about 11.1 hours of daylight. It is the 5th-warmest and 1st-wettest month of the year here.

Highs ease over the month, from about 22°C in the first days to 18°C by the end. The sky is clear or mostly clear about 31% 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 Ōiso's 6th-clearest and 3rd-windiest month. For the whole year in context, see Ōiso's year-round climate.

Daytime high
20°
5th warmest
Overnight low
17°
8th coldest
Rainfall
267 mm
15.5 wet days
Daylight
11 h 06 min
5:55 AM – 5:01 PM
Cloud cover
62%
6th clearest
Wind
14 km/h
3rd windiest
Solar energy
3 kWh/m²
Travel score
5.5
out of 10

Ōiso is town in Naka District, Kanagawa Prefecture, Japan.

Density
1,897/km²
people per km²
Founded
1889

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in October

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 22°C in the first days to 18°C by the end.

A typical October day in Ōiso reaches about 20°C in the afternoon and slips back to 17°C overnight — a 3°C spread between the day's warmth and the night's chill. On most days the high lands between 17°C and 23°C. Set against its neighbours, October runs about 4°C cooler than September and about 4°C warmer than November.

10°15°20°25°151015202531
Avg high (°C)Avg low (°C)
12219
22219
32219
42218
52218
62118
72118
82118
92118
102118
112117
122017
132017
142017
152017
162017
172016
182016
191916
201916
211916
221916
231915
241915
251915
261815
271815
281815
291814
301814
311814

Ōiso weather by month

How October compares with the rest of the year at a glance. October is the 5th-warmest and 1st-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / 98102.39.91.7
Feb / 10711.32.710.71.7
Mar12° / 18616.31.611.72.6
Apr15° / 11°17614.40.312.94.2
May19° / 15°18113.6013.85.5
Jun22° / 19°23115.9014.35.3
Jul25° / 22°20014.7014.15.8
Aug27° / 24°15413.5013.36.0
Sep24° / 21°24115.5012.25.8
Oct20° / 17°26715.5011.15.5
Nov16° / 12°14113.1010.14.5
Dec11° / 9410.90.39.72.8

Cloud cover in October

ClearMostly clearPartly cloudyMostly cloudyOvercast

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

Beyond those clear spells, partly cloudy skies cover about 15% of October, with mostly cloudy or overcast conditions the remaining 55%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13763
23862
33862
43961
53961
64060
74060
84159
94159
104258
114258
124159
134357
144456
154555
164555
174654
184654
194753
204852
214951
225050
235050
245050
255149
265248
275347
285446
295446
305446
315446

Chance of precipitation in October

Any precipitation

Ōiso gets around 267 mm of rain over 15.5 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 49% and peaks near 55% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%151015202531
Rain chance (%)
155
255
355
455
555
654
754
854
954
1053
1153
1252
1351
1451
1550
1649
1749
1848
1948
2047
2147
2246
2346
2445
2544
2644
2743
2842
2942
3041
3141

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 38% 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 (%)
1132536234
2132636223
3142736213
4162735202
5172834192
6182934182
7203033171
8213131161
9233130141
10253229131
11273327121
12293425110
13313524100
1433362280
1535362170
1637361970
1740361860
1842361750
1944361540
2047361430
2149361330
2251351220
2352351120
2455341010
255634910
265833810
275932810
286231700
296429700
306628600
316727600

Wind in October

Winds average 14 km/h in October.

Across October, daily wind ranges from about 13 km/h on the calmest days to 14 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
114light breeze
214light breeze
314light breeze
414light breeze
514light breeze
614light breeze
714light breeze
814light breeze
914light breeze
1014light breeze
1114light breeze
1214light breeze
1314light breeze
1414light breeze
1514light breeze
1614light breeze
1714light breeze
1814light breeze
1914light breeze
2014light breeze
2114light breeze
2214light breeze
2314light breeze
2414light breeze
2514light breeze
2613light breeze
2713light breeze
2813light breeze
2913light breeze
3013light breeze
3113light breeze

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 5:42 AM to 6:09 AM, and sunset from 5:21 PM to 4:44 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.65:425:21
211.65:435:20
311.65:445:18
411.55:455:17
511.55:465:15
611.55:465:14
711.45:475:13
811.45:485:11
911.35:495:10
1011.35:505:08
1111.35:515:07
1211.25:515:06
1311.25:525:04
1411.25:535:03
1511.15:545:02
1611.15:555:01
1711.15:564:59
1811.05:574:58
1911.05:584:57
2010.95:594:56
2110.96:004:54
2210.96:004:53
2310.86:014:52
2410.86:024:51
2510.86:034:50
2610.76:044:49
2710.76:054:48
2810.76:064:47
2910.66:074:46
3010.66:084:45
3110.66:094:44

Solar energy in October

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in October, about 3 kWh/m².

For context, solar energy here swings from a low near 2.33 kWh/m² to a high of 5.18 kWh/m² in May across the year — October's 3 kWh/m² falls in the middle.

01234151015202531
Solar energy (kWh/m²)Level
13.3Moderate
23.3Moderate
33.2Moderate
43.2Moderate
53.2Moderate
63.2Moderate
73.1Moderate
83.1Moderate
93.1Moderate
103.1Moderate
113.1Moderate
123.1Moderate
133.0Moderate
143.0Moderate
153.0Moderate
163.0Moderate
173.0Moderate
183.0Moderate
193.0Moderate
203.0Moderate
212.9Moderate
222.9Moderate
232.9Moderate
242.9Moderate
252.9Moderate
262.9Moderate
272.9Moderate
282.9Moderate
292.8Moderate
302.8Moderate
312.8Moderate
Planning a trip in October

Hazard calendar for Ōiso

In seasonPeak

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

Ōiso 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 Ōiso?

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

5.5
Sightseeing
4th-best month of the year
2.8
Beach & pool
5th-best month of the year

October is a reasonable time to visit Ōiso for sightseeing.

What to pack for Ōiso in October

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

In October, Ōiso sees daytime highs around 20°C and nights near 17°C. Pack rain gear. About 16 days see rain.

rain gear

Sea temperature near Ōiso in October

The nearest coast averages about 23°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 22 km away) is warmest in August at about 26°C and coldest in February near 15°C.

It's comfortable for a long swim from May 31 to Nov 26 — about 5.9 months when the water holds above 20°C.

15°20°25°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan16Cool
Feb15Cool
Mar16Cool
Apr17Cool
May19Cool
Jun21Refreshing
Jul24Refreshing
Aug26Warm
Sep25Warm
Oct23Refreshing
Nov21Refreshing
Dec18Cool

UV index in Ōiso 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 Ōiso peaks around July 20 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 highHighModerateJul 20UV 10Dec 23UV 2
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar5Moderate
Apr7High
May9Very high
Jun9Very high
Jul10Extreme
Aug10Very high
Sep9Very high
Oct6High
Nov4Moderate
Dec2Moderate

Air quality in Ōiso 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 Ōiso is worst in April — around 26 µg/m³ PM2.5 (moderate), about 2.2× the cleanest month (December, 12 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateApr 1525 µg/m³Dec 1612 µg/m³
PM2.5 (µg/m³)Level
Jan14Moderate
Feb25Moderate
Mar23Moderate
Apr26Moderate
May21Moderate
Jun18Moderate
Jul13Moderate
Aug12Moderate
Sep12Moderate
Oct14Moderate
Nov14Moderate
Dec12Good
Location & terrain

Where is Ōiso?

Ōiso sits at 35.3°N, 139.3°E, 71 m above sea level, in Japan. The nearest listed city is Hiratsuka, 2.0 km away.

Topography around Ōiso

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

Within 3 km, the terrain around Ōiso has only modest variations in elevation — a maximum elevation change of 179 m around an average of 21 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,245 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,737 m.

The land around Ōiso is covered by artificial surfaces (37%), water (34%) and trees (25%) within 3 km, water (43%), artificial surfaces (28%) and trees (22%) within 16 km, and trees (42%) and water (35%) within 80 km.

3 km
179 m
16 km
1,245 m
80 km
3,737 m
treesgrasslandcroplandartificial surfacesbare terrainwater
October weather nearby: Hiratsuka 2.0 km · Ninomiya 6.0 km · Chigasaki 8.0 km · Isehara 9.0 km · Nihammatsu 9.0 km · Ebina 10 km · Hadano 10 km · Kamiōi 14 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 Ōiso (35.3156°, 139.3162°, elevation 71 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).