Ōmihachiman weather in October

In October, Ōmihachiman sees average daytime highs of 21°C and overnight lows near 14°C, with 152 mm of rain across 10.8 wet days and about 11.1 hours of daylight. It is the 6th-warmest and 4th-wettest month of the year here.

Highs ease over the month, from about 23°C in the first days to 18°C by the end. The sky is clear or mostly clear about 35% of the time in October, and the air most often feels dry.

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 Ōmihachiman's 2nd-clearest and 8th-windiest month. For the whole year in context, see Ōmihachiman's year-round climate.

Daytime high
21°
6th warmest
Overnight low
14°
8th coldest
Rainfall
152 mm
10.8 wet days
Daylight
11 h 06 min
6:08 AM – 5:14 PM
Cloud cover
57%
2nd clearest
Wind
9 km/h
8th windiest
Solar energy
3.3 kWh/m²
Travel score
6.4
out of 10

Ōmihachiman is city in Shiga Prefecture, Japan.

Density
1,068/km²
people per km²
Founded
2010

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 23°C in the first days to 18°C by the end.

A typical October day in Ōmihachiman reaches about 21°C in the afternoon and slips back to 14°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 17°C and 24°C. Set against its neighbours, October runs about 6°C cooler than September and about 6°C warmer than November.

10°15°20°25°30°151015202531
Avg high (°C)Avg low (°C)
12317
22317
32316
42316
52316
62316
72216
82215
92215
102215
112215
122215
132114
142114
152114
162114
172114
182013
192013
202013
212013
222013
231912
241912
251912
261912
271912
281911
291811
301811
311811

How October really feels in Ōmihachiman

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.

Ōmihachiman weather by month

How October compares with the rest of the year at a glance. October is the 6th-warmest and 4th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / 8113.97.59.90.7
Feb / 7612.76.510.71.0
Mar12° / 11613.52.111.72.7
Apr17° / 12311.60.112.95.1
May22° / 13°14811.6013.86.3
Jun25° / 18°18614014.35.7
Jul29° / 22°21015.9014.14.5
Aug31° / 23°12212.4013.34.3
Sep27° / 20°17912.3012.25.9
Oct21° / 14°15210.8011.16.4
Nov15° / 819010.24.7
Dec / 7511.63.19.72.0

Cloud cover in October

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 35% of the time in October.

Beyond those clear spells, partly cloudy skies cover about 16% of October, with mostly cloudy or overcast conditions the remaining 49%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14060
24060
34159
44258
54357
64456
74456
84555
94654
104753
114951
125050
135050
145149
155248
165248
175446
185446
195446
205446
215545
225545
235545
245545
255545
265644
275644
285743
295743
305842
315842

Chance of precipitation in October

Any precipitation

Ōmihachiman gets around 152 mm of rain over 10.8 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 34% and peaks near 39% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%40%50%151015202531
Rain chance (%)
139
239
339
439
538
638
738
837
936
1036
1135
1234
1334
1433
1533
1633
1733
1833
1933
2033
2133
2233
2333
2433
2533
2633
2732
2832
2932
3031
3131

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 55% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1233131122
2243131112
3263230102
4283229102
529332891
631332781
733332671
836332471
938332261
1041322161
1143321950
1246321850
1348311640
1450311540
1554301330
1656291230
1758281130
186227920
196426820
206625720
217023610
227222510
237321510
247520410
257619410
267917400
278116300
288215300
298314300
308413300
318612200

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 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 5:55 AM to 6:22 AM, and sunset from 5:34 PM to 4:57 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.75:555:34
211.65:565:33
311.65:575:31
411.55:585:30
511.55:585:28
611.55:595:27
711.46:005:26
811.46:015:24
911.46:025:23
1011.36:025:21
1111.36:035:20
1211.26:045:19
1311.26:055:17
1411.26:065:16
1511.16:075:15
1611.16:085:14
1711.16:095:12
1811.06:095:11
1911.06:105:10
2011.06:115:09
2110.96:125:07
2210.96:135:06
2310.96:145:05
2410.86:155:04
2510.86:165:03
2610.86:175:02
2710.76:185:01
2810.76:195:00
2910.76:204:59
3010.66:214:58
3110.66:224:57

Solar energy in October

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in October, about 3.3 kWh/m².

For context, solar energy here swings from a low near 2.15 kWh/m² to a high of 5.32 kWh/m² in May across the year — October's 3.3 kWh/m² falls in the middle.

01234151015202531
Solar energy (kWh/m²)Level
13.5Moderate
23.5Moderate
33.5Moderate
43.5Moderate
53.5Moderate
63.4Moderate
73.4Moderate
83.4Moderate
93.4Moderate
103.4Moderate
113.4Moderate
123.4Moderate
133.4Moderate
143.4Moderate
153.4Moderate
163.3Moderate
173.3Moderate
183.3Moderate
193.3Moderate
203.3Moderate
213.2Moderate
223.2Moderate
233.2Moderate
243.2Moderate
253.1Moderate
263.1Moderate
273.1Moderate
283.1Moderate
293.0Moderate
303.0Moderate
313.0Moderate
Planning a trip in October

Hazard calendar for Ōmihachiman

In seasonPeak

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

Ōmihachiman 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 Ōmihachiman?

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

6.4
Sightseeing
1st-best month of the year
3.7
Beach & pool
6th-best month of the year

October is a reasonable time to visit Ōmihachiman for sightseeing.

What to pack for Ōmihachiman in October

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

In October, Ōmihachiman sees daytime highs around 21°C and nights near 14°C. Worth packing: rain gear. About 11 days see rain.

rain gear

Sea temperature near Ōmihachiman 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 56 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 May 31 to Nov 9 — about 5.4 months when the water holds above 20°C.

10°15°20°25°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan14Bracing
Feb13Bracing
Mar14Bracing
Apr15Cool
May18Cool
Jun22Refreshing
Jul26Warm
Aug27Warm
Sep26Warm
Oct22Refreshing
Nov19Cool
Dec16Cool

UV index in Ōmihachiman 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 Ōmihachiman peaks around July 14 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 highVery highModerateJul 14UV 10Dec 23UV 2
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar5High
Apr7High
May8Very high
Jun10Very high
Jul10Extreme
Aug9Very high
Sep9Very high
Oct6High
Nov3Moderate
Dec2Moderate

Air quality in Ōmihachiman 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 Ōmihachiman is worst in April — around 24 µg/m³ PM2.5 (moderate), about 2.0× the cleanest month (October, 12 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateApr 1723 µg/m³Oct 1812 µg/m³
PM2.5 (µg/m³)Level
Jan14Moderate
Feb17Moderate
Mar22Moderate
Apr24Moderate
May22Moderate
Jun19Moderate
Jul17Moderate
Aug17Moderate
Sep14Moderate
Oct12Good
Nov13Moderate
Dec12Moderate
Location & terrain

Where is Ōmihachiman?

Ōmihachiman sits at 35.1°N, 136.1°E, 91 m above sea level, in Japan. The nearest listed city is Yasu, 8.0 km away.

Topography around Ōmihachiman

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

Within 3 km, the terrain around Ōmihachiman has only modest variations in elevation — a maximum elevation change of 198 m around an average of 95 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 355 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,602 m.

The land around Ōmihachiman is covered by cropland (52%) and artificial surfaces (37%) within 3 km, cropland (31%), water (27%) and artificial surfaces (21%) within 16 km, and trees (58%) within 80 km.

3 km
198 m
16 km
355 m
80 km
1,602 m
treesgrasslandcroplandartificial surfacesbare terrainwater
October weather nearby: Yasu 8.0 km · Youkaichi 9.0 km · Echigawa 10 km · Moriyama 12 km · Rittō 14 km · Konan 14 km · Kitahama 17 km · Kusatsu 17 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 Ōmihachiman (35.1286°, 136.0976°, elevation 91 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).