Muroran weather in July

In July, Muroran sees average daytime highs of 20°C and overnight lows near 17°C, with 153 mm of rain across 13 wet days and about 14.8 hours of daylight. It is the 3rd-warmest and 3rd-wettest month of the year here.

Highs climb over the month, from about 18°C in the first days to 21°C by the end. The sky is clear or mostly clear about 17% of the time in July, and the air most often feels humid.

Daylight stretches from about 15 h 06 min at the start of July to 14 h 24 min by month's end. Set against the rest of the year, July is Muroran's 12th-clearest and 12th-windiest month. For the whole year in context, see Muroran's year-round climate.

Daytime high
20°
3rd warmest
Overnight low
17°
10th coldest
Rainfall
153 mm
13 wet days
Daylight
14 h 48 min
4:17 AM – 7:06 PM
Cloud cover
73%
12th clearest
Wind
13 km/h
12th windiest
Solar energy
4.57 kWh/m²
Travel score
5.6
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 July

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 18°C in the first days to 21°C by the end.

A typical July day in Muroran 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 16°C and 23°C. Set against its neighbours, July runs about 4°C warmer than June and about 2°C cooler than August.

10°15°20°25°151015202531
Avg high (°C)Avg low (°C)
11815
21815
31815
41815
51815
61816
71816
81916
91916
101916
111916
121916
131917
141917
151917
162017
172017
182017
192017
202017
212018
222018
232018
242118
252118
262118
272118
282119
292119
302119
312119

How July really feels in Muroran

Once humidity and wind are folded in, July 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

July 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 July compares with the rest of the year at a glance. July is the 3rd-warmest and 3rd-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 July

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 17% of the time in July, the cloudiest month of the year.

Beyond those clear spells, partly cloudy skies cover about 13% of July, with mostly cloudy or overcast conditions the remaining 70%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13367
23367
33268
43268
53268
63268
73169
83169
93070
103070
113070
123169
133169
142971
152971
162971
172971
182872
192872
202971
212872
222971
232971
242971
252971
262971
273169
283169
293169
303268
313367

Chance of precipitation in July

Any precipitation

Muroran gets around 153 mm of rain over 13 wet days in July. 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 42% on the wettest days.

0%10%20%30%40%50%151015202531
Rain chance (%)
137
238
339
439
540
641
741
842
942
1042
1142
1242
1341
1441
1541
1641
1741
1841
1941
2041
2141
2241
2341
2441
2541
2640
2740
2840
2940
3040
3139

Humidity in July

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, July lands in the humid band about 39% of days. Sticky, muggy-or-worse air turns up on roughly 22% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
124522310
222502620
321492830
419483030
518463240
616453450
715433660
814423870
913403980
1012384190
11113642100
12113544110
13103345120
1493246130
1583046150
1682947170
1772747190
1862547210
1962447231
2052246261
2152046281
2251945302
2341843332
2441742353
2531640374
2631538395
2731437416
2821435427
2921333438
3021332449
31212314511

Wind in July

Winds average 13 km/h in July, the calmest month.

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

05101520151015202531
Wind speed (km/h)Feels
113light breeze
213light breeze
313light breeze
413light breeze
513light breeze
613light breeze
713light breeze
813light breeze
913light breeze
1013light breeze
1113light breeze
1213light breeze
1313light breeze
1413light breeze
1513light breeze
1613light breeze
1713light breeze
1813light breeze
1913light breeze
2013light breeze
2113light breeze
2213light breeze
2313light breeze
2413light breeze
2513light breeze
2613light breeze
2713light breeze
2813light breeze
2913light breeze
3013light breeze
3113light breeze

Sunrise & sunset in July

DaylightNight

Daylight runs from about 15 h 06 min at the start of July to 14 h 24 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 42 minutes over July. Sunrise moves from 4:08 AM to 4:31 AM, and sunset from 7:11 PM to 6:53 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
115.14:087:11
215.14:087:11
315.04:097:11
415.04:097:11
515.04:107:11
615.04:107:10
715.04:117:10
815.04:117:10
915.04:127:09
1014.94:137:09
1114.94:147:09
1214.94:147:08
1314.94:157:08
1414.94:167:07
1514.84:177:07
1614.84:177:06
1714.84:187:05
1814.84:197:05
1914.74:207:04
2014.74:217:03
2114.74:227:02
2214.74:237:02
2314.64:247:01
2414.64:247:00
2514.64:256:59
2614.54:266:58
2714.54:276:57
2814.54:286:56
2914.44:296:55
3014.44:306:54
3114.44:316:53

Solar energy in July

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in July, about 4.57 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 — July's 4.57 kWh/m² falls in the middle.

024151015202531
Solar energy (kWh/m²)Level
14.9Bright
24.9Bright
34.9Bright
44.8Bright
54.8Bright
64.8Bright
74.8Bright
84.7Bright
94.7Bright
104.7Bright
114.7Bright
124.7Bright
134.6Bright
144.6Bright
154.6Bright
164.6Bright
174.6Bright
184.6Bright
194.5Bright
204.5Bright
214.5Bright
224.5Bright
234.5Bright
244.5Bright
254.5Bright
264.5Bright
274.5Bright
284.5Bright
294.5Bright
304.5Bright
314.5Bright
Planning a trip in July

Hazard calendar for Muroran

In seasonPeak

In July, 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 July a good time to visit Muroran?

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

5.6
Sightseeing
3rd-best month of the year
2.7
Beach & pool
3rd-best month of the year

July is a reasonable time to visit Muroran for sightseeing.

What to pack for Muroran in July

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

In July, Muroran sees daytime highs around 20°C and nights near 17°C. Worth packing: rain gear and sun protection. About 13 days see rain.

rain gearsun protection

Sea temperature near Muroran in July

The nearest coast averages about 18°C in July — 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 July

LowModerateHighVery highExtreme

Clear-sky midday UV in July peaks around 5 — 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 July

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where July 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
July 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).