Muroran weather in October

In October, Muroran sees average daytime highs of 14°C and overnight lows near 11°C, with 103 mm of precipitation across 10.9 wet days and about 10.8 hours of daylight. It is the 5th-warmest and 6th-wettest month of the year here.

Highs ease over the month, from about 17°C in the first days to 11°C by the end. The sky is clear or mostly clear about 37% of the time in October, and the air most often feels dry.

Daylight stretches from about 11 h 30 min at the start of October to 10 h 12 min by month's end. Set against the rest of the year, October is Muroran's 1st-clearest and 6th-windiest month. For the whole year in context, see Muroran's year-round climate.

Daytime high
14°
5th warmest
Overnight low
11°
8th coldest
Precipitation
103 mm
10.9 wet days
Daylight
10 h 48 min
5:56 AM – 4:46 PM
Cloud cover
54%
1st clearest
Wind
18 km/h
6th windiest
Solar energy
3.08 kWh/m²
Travel score
4.2
out of 10

Muroran is city in Hokkaido, Japan.

Density
1,187/km²
people per km²
Founded
1922

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 17°C in the first days to 11°C by the end.

A typical October day in Muroran reaches about 14°C in the afternoon and slips back to 11°C overnight — a 3°C spread between the day's warmth and the night's chill. On most days the high lands between 11°C and 17°C. Set against its neighbours, October runs about 6°C cooler than September and about 7°C warmer than November.

10°15°20°151015202531
Avg high (°C)Avg low (°C)
11815
21815
31714
41714
51714
61714
71713
81613
91613
101613
111612
121512
131512
141512
151511
161411
171411
181410
191310
201310
21139
22139
23129
24129
25128
26128
27118
28118
29118
30117
31107

How October really feels in Muroran

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.

Muroran weather by month

How October compares with the rest of the year at a glance. October is the 5th-warmest and 6th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan-1° / -4°508.510.19.30.0
Feb-0° / -4°437.4710.30.0
Mar / -1°579.1611.60.0
Apr / 769.11.513.10.5
May11° / 11211.1014.42.5
Jun15° / 12°10410.30154.5
Jul20° / 17°15313014.85.6
Aug22° / 19°18112.6013.76.0
Sep20° / 17°16613012.35.8
Oct14° / 11°10310.90.110.84.2
Nov / 80111.79.61.0
Dec / -1°69119.790.0

Cloud cover in October

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 37% of the time in October, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 19% of October, with mostly cloudy or overcast conditions the remaining 44%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14753
24852
34852
44951
55050
65149
75149
85248
95347
105446
115545
125644
135644
145743
155743
165842
175743
185842
195842
205842
215842
225941
235941
245941
255941
265941
275941
285941
296040
305941
315941

Chance of precipitation in October

Any precipitation

Muroran gets around 103 mm of rain and snow over 10.9 wet days in October. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 35% and peaks near 39% on the wettest days, and about 0 day brings snow.

0%10%20%30%40%50%151015202531
Rain chance (%)
139
239
339
438
538
638
737
837
937
1036
1136
1236
1336
1435
1535
1635
1735
1835
1934
2034
2134
2234
2334
2434
2534
2634
2734
2833
2933
3033
3133

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 85% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)
158339
260328
362317
465296
567285
669265
772244
875223
977203
1080182
1181172
1284151
1385141
1487121
1588111
1689101
179091
189181
199370
209460
219550
229550
239640
249730
259730
269820
279820
289820
299820
309910
319910

Wind in October

Winds average 18 km/h in October.

Across October, daily wind ranges from about 18 km/h on the calmest days to 18 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
118light breeze
218light breeze
318light breeze
418light breeze
518light breeze
618light breeze
718light breeze
818light breeze
918light breeze
1018light breeze
1118light breeze
1218light breeze
1318light breeze
1418light breeze
1518light breeze
1618light breeze
1718light breeze
1818light breeze
1918light breeze
2018light breeze
2118light breeze
2218light breeze
2318light breeze
2418light breeze
2518light breeze
2618light breeze
2718light breeze
2818light breeze
2918light breeze
3018light breeze
3118light breeze

Sunrise & sunset in October

DaylightNight

Daylight runs from about 11 h 30 min at the start of October to 10 h 12 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 78 minutes over October. Sunrise moves from 5:39 AM to 6:15 AM, and sunset from 5:11 PM to 4:24 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.55:395:11
211.55:405:10
311.55:415:08
411.45:425:06
511.45:435:04
611.35:445:03
711.35:455:01
811.25:474:59
911.25:484:58
1011.15:494:56
1111.15:504:54
1211.05:514:52
1311.05:534:51
1410.95:544:49
1510.95:554:48
1610.85:564:46
1710.85:574:44
1810.75:594:43
1910.76:004:41
2010.66:014:40
2110.66:024:38
2210.66:034:37
2310.56:054:35
2410.56:064:34
2510.46:074:32
2610.46:084:31
2710.36:104:30
2810.36:114:28
2910.26:124:27
3010.26:134:26
3110.26:154:24

Solar energy in October

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in October, about 3.08 kWh/m².

For context, solar energy here swings from a low near 1.73 kWh/m² to a high of 5.42 kWh/m² in May across the year — October's 3.08 kWh/m² falls in the middle.

01234151015202531
Solar energy (kWh/m²)Level
13.5Moderate
23.4Moderate
33.4Moderate
43.4Moderate
53.4Moderate
63.3Moderate
73.3Moderate
83.3Moderate
93.3Moderate
103.2Moderate
113.2Moderate
123.2Moderate
133.2Moderate
143.2Moderate
153.1Moderate
163.1Moderate
173.1Moderate
183.1Moderate
193.0Moderate
203.0Moderate
213.0Moderate
222.9Moderate
232.9Moderate
242.9Moderate
252.8Moderate
262.8Moderate
272.8Moderate
282.7Moderate
292.7Moderate
302.6Moderate
312.6Moderate
Planning a trip in October

Hazard calendar for Muroran

In seasonPeak

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

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

Muroran's rainy season runs May–October, 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 Muroran?

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

4.2
Sightseeing
5th-best month of the year
0.5
Beach & pool
5th-best month of the year

October is a reasonable time to visit Muroran for sightseeing.

What to pack for Muroran in October

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

In October, Muroran sees daytime highs around 14°C and nights near 11°C. Worth packing: a warm layer and rain gear. About 11 days see rain.

a warm layerrain gear

Sea temperature near Muroran in October

The nearest coast averages about 17°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 21°C and coldest in February near 4°C.

It's comfortable for a long swim from Aug 9 to Sep 13 — about 1.2 months when the water holds above 20°C.

0°10°20°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarm
Sea temperature (°C)Comfort
Jan6Bracing
Feb4Bracing
Mar4Bracing
Apr6Bracing
May9Bracing
Jun14Bracing
Jul18Cool
Aug21Refreshing
Sep20Refreshing
Oct17Cool
Nov12Bracing
Dec9Bracing

UV index in Muroran in October

LowModerateHighVery highExtreme

Clear-sky midday UV in October peaks around 4 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Muroran peaks around August 18 at about 8 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 at about 1 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 7 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highHighVery highHighModerateLowAug 18UV 8Dec 22UV 1
UV index (midday)Level
Jan1Low
Feb2Moderate
Mar3Moderate
Apr5High
May8Very high
Jun7High
Jul5Moderate
Aug9Very high
Sep6High
Oct4Moderate
Nov2Low
Dec1Low

Air quality in Muroran 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 Muroran is worst in April — around 17 µg/m³ PM2.5 (moderate), about 2.6× the cleanest month (December, 6 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodApr 1216 µg/m³Dec 177 µg/m³
PM2.5 (µg/m³)Level
Jan8Good
Feb11Good
Mar16Moderate
Apr17Moderate
May14Moderate
Jun9Good
Jul8Good
Aug8Good
Sep8Good
Oct9Good
Nov8Good
Dec6Good
Location & terrain

Where is Muroran?

Muroran sits at 42.3°N, 141.0°E, 8 m above sea level, in Japan. The nearest listed city is Date, 19 km away.

Topography around Muroran

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

Within 3 km, the terrain around Muroran has only modest variations in elevation — a maximum elevation change of 185 m around an average of 21 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 901 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,867 m.

The land around Muroran is covered by water (49%), trees (25%) and artificial surfaces (23%) within 3 km, water (76%) within 16 km, and trees (48%) and water (45%) within 80 km.

3 km
185 m
16 km
901 m
80 km
1,867 m
treesgrasslandcroplandartificial surfaceswater
October weather nearby: Date 19 km · Noboribetsu 22 km · Shiraoi 39 km · Honchō 53 km · Yakumo 60 km · Niseko 60 km · Tomakomai 62 km · Kamiiso 62 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 Muroran (42.3172°, 140.9881°, elevation 8 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).