Ōyama weather in October

In October, Ōyama sees average daytime highs of 22°C and overnight lows near 20°C, with 259 mm of rain across 14.1 wet days and about 11.1 hours of daylight. It is the 5th-warmest and 2nd-wettest month of the year here.

Highs ease over the month, from about 23°C in the first days to 20°C by the end. The sky is clear or mostly clear about 39% of the time in October, and the air most often feels comfortable.

Daylight stretches from about 11 h 42 min at the start of October to 10 h 36 min by month's end. Set against the rest of the year, October is Ōyama's 7th-clearest and 6th-windiest month. For the whole year in context, see Ōyama's year-round climate.

Daytime high
22°
5th warmest
Overnight low
20°
8th coldest
Rainfall
259 mm
14.1 wet days
Daylight
11 h 06 min
5:59 AM – 5:06 PM
Cloud cover
55%
7th clearest
Wind
25 km/h
6th windiest
Solar energy
3.39 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 23°C in the first days to 20°C by the end.

A typical October day in Ōyama reaches about 22°C in the afternoon and slips back to 20°C overnight — a 2°C spread between the day's warmth and the night's chill. On most days the high lands between 20°C and 24°C. Set against its neighbours, October runs about 4°C cooler than September and about 4°C warmer than November.

15°20°25°30°151015202531
Avg high (°C)Avg low (°C)
12422
22422
32422
42321
52321
62321
72321
82321
92321
102321
112321
122220
132220
142220
152220
162220
172220
182220
192119
202119
212119
222119
232119
242119
252118
262118
272018
282018
292018
302018
312018

Ōyama weather by month

How October compares with the rest of the year at a glance. October is the 5th-warmest and 2nd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan11° / 948.39.92.8
Feb11° / 1129.310.72.9
Mar14° / 10°18012.911.73.7
Apr17° / 14°17711.812.85.1
May20° / 18°20811.613.86.0
Jun22° / 21°29014.514.35.6
Jul26° / 24°24013.614.16.1
Aug27° / 26°13713.213.36.2
Sep25° / 24°24015.612.25.9
Oct22° / 20°25914.111.16.1
Nov18° / 15°16012.110.25.6
Dec13° / 10°949.59.74.1

Cloud cover in October

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 39% of the time in October.

Beyond those clear spells, partly cloudy skies cover about 13% of October, with mostly cloudy or overcast conditions the remaining 48%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14654
24654
34654
44654
54753
64852
74753
84852
94951
104951
115050
125050
135050
145248
155248
165248
175347
185446
195446
205446
215545
225446
235545
245545
255545
265644
275644
285743
295842
305842
315842

Chance of precipitation in October

Any precipitation

Ōyama gets around 259 mm of rain over 14.1 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 45% and peaks near 53% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%151015202531
Rain chance (%)
153
253
352
452
551
651
751
850
950
1049
1149
1248
1348
1447
1546
1645
1744
1844
1943
2042
2142
2241
2341
2440
2539
2639
2738
2837
2937
3037
3137

Humidity in October

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, October lands in the comfortable band about 31% of days. Sticky, muggy-or-worse air turns up on roughly 21% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1217323612
2218333511
3319343510
432034349
532135338
642235317
752335306
862535296
962635275
1072835255
1192935234
12103134214
13113234203
14133433183
15143532163
16163631152
17183630142
18203729122
19223828111
20243827101
2126392691
2228392581
2330392371
2433382261
2535382160
2637372050
2739371950
2841361840
2943361740
3045351730
3146351630

Wind in October

Winds average 25 km/h in October.

Across October, daily wind ranges from about 24 km/h on the calmest days to 25 km/h at its breeziest. It stays fairly steady from day to day.

0102030151015202531
Wind speed (km/h)Feels
124breezy
224breezy
324breezy
424breezy
524breezy
624breezy
724breezy
824breezy
924breezy
1024breezy
1124breezy
1224breezy
1324breezy
1424breezy
1524breezy
1624breezy
1724breezy
1824breezy
1924breezy
2025breezy
2125breezy
2225breezy
2325breezy
2425breezy
2525breezy
2625breezy
2724breezy
2824breezy
2924breezy
3024breezy
3124breezy

Sunrise & sunset in October

DaylightNight

Daylight runs from about 11 h 42 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 66 minutes over October. Sunrise moves from 5:46 AM to 6:12 AM, and sunset from 5:26 PM to 4:49 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.75:465:26
211.65:475:24
311.65:485:23
411.55:495:22
511.55:505:20
611.55:505:19
711.45:515:17
811.45:525:16
911.45:535:15
1011.35:545:13
1111.35:545:12
1211.35:555:11
1311.25:565:09
1411.25:575:08
1511.25:585:07
1611.15:595:06
1711.16:005:04
1811.06:005:03
1911.06:015:02
2011.06:025:01
2110.96:035:00
2210.96:044:58
2310.96:054:57
2410.86:064:56
2510.86:074:55
2610.86:084:54
2710.76:094:53
2810.76:094:52
2910.76:104:51
3010.66:114:50
3110.66:124:49

Solar energy in October

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in October, about 3.39 kWh/m².

For context, solar energy here swings from a low near 2.6 kWh/m² to a high of 5.59 kWh/m² in May across the year — October's 3.39 kWh/m² falls in the middle.

01234151015202531
Solar energy (kWh/m²)Level
13.8Moderate
23.7Moderate
33.7Moderate
43.7Moderate
53.6Moderate
63.6Moderate
73.6Moderate
83.6Moderate
93.5Moderate
103.5Moderate
113.5Moderate
123.5Moderate
133.5Moderate
143.4Moderate
153.4Moderate
163.4Moderate
173.4Moderate
183.3Moderate
193.3Moderate
203.3Moderate
213.3Moderate
223.3Moderate
233.2Moderate
243.2Moderate
253.2Moderate
263.2Moderate
273.2Moderate
283.1Moderate
293.1Moderate
303.1Moderate
313.1Moderate
Planning a trip in October

Hazard calendar for Ōyama

In seasonPeak

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

Ōyama 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 Ōyama?

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
4.2
Beach & pool
4th-best month of the year

October is a reasonable time to visit Ōyama for sightseeing.

What to pack for Ōyama in October

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

In October, Ōyama sees daytime highs around 22°C and nights near 20°C. Pack rain gear. Worth having: a windbreaker. About 14 days see rain.

rain geara windbreaker

Sea temperature near Ōyama in October

The nearest coast averages about 24°C in October — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea offshore is warmest in August at about 27°C and coldest in February near 16°C.

It's comfortable for a long swim from May 25 to Nov 29 — about 6.2 months when the water holds above 20°C.

15°20°25°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan16Cool
Feb16Cool
Mar16Cool
Apr17Cool
May19Cool
Jun22Refreshing
Jul25Warm
Aug27Warm
Sep26Warm
Oct24Refreshing
Nov21Refreshing
Dec19Cool

UV index in Ōyama 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 Ōyama peaks around July 22 at about 10 (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 — in 10 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highExtremeVery highModerateJul 22UV 10Dec 23UV 3
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar5Moderate
Apr7High
May9Very high
Jun10Very high
Jul10Extreme
Aug10Very high
Sep9Very high
Oct6High
Nov4Moderate
Dec3Moderate

Air quality in Ōyama 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 Ōyama is worst in April — around 21 µg/m³ PM2.5 (moderate), about 2.3× the cleanest month (December, 9 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodApr 1721 µg/m³Dec 159 µg/m³
PM2.5 (µg/m³)Level
Jan11Good
Feb14Moderate
Mar19Moderate
Apr21Moderate
May19Moderate
Jun16Moderate
Jul12Good
Aug11Good
Sep10Good
Oct11Good
Nov10Good
Dec9Good
Location & terrain

Where is Ōyama?

Ōyama sits at 34.6°N, 138.2°E, 50 m above sea level, in Japan. The nearest listed city is Omaezaki, 1.0 km away.

Topography around Ōyama

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

Within 3 km, the terrain around Ōyama has only modest variations in elevation — a maximum elevation change of 51 m around an average of 8 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 154 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,311 m.

The land around Ōyama is covered by water (70%) within 3 km, water (80%) within 16 km, and water (55%) and trees (37%) within 80 km.

3 km
51 m
16 km
154 m
80 km
2,311 m
treesgrasslandcroplandartificial surfacesbare terrainwater
October weather nearby: Omaezaki 1.0 km · Sagara 9.0 km · Kikugawa 14 km · Maruobara 17 km · Sumiyoshi 17 km · Shimada 24 km · Kanaya 25 km · Kakegawa 26 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 Ōyama (34.6036°, 138.2172°, elevation 50 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).