Otaru weather in July

In July, Otaru sees average daytime highs of 21°C and overnight lows near 17°C, with 127 mm of rain across 12.8 wet days and about 14.9 hours of daylight. It is the 2nd-warmest and 4th-wettest month of the year here.

Highs climb over the month, from about 19°C in the first days to 22°C by the end. The sky is clear or mostly clear about 19% of the time in July, and the air most often feels humid.

Daylight stretches from about 15 h 12 min at the start of July to 14 h 24 min by month's end. Set against the rest of the year, July is Otaru's 9th-clearest and 12th-windiest month. For the whole year in context, see Otaru's year-round climate.

Daytime high
21°
2nd warmest
Overnight low
17°
11th coldest
Rainfall
127 mm
12.8 wet days
Daylight
14 h 54 min
4:15 AM – 7:09 PM
Cloud cover
69%
9th clearest
Wind
9 km/h
12th windiest
Solar energy
5.08 kWh/m²
Travel score
5.9
out of 10

Temperature in July

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 19°C in the first days to 22°C by the end.

A typical July day in Otaru reaches about 21°C in the afternoon and slips back to 17°C overnight — a 4°C spread between the day's warmth and the night's chill. On most days the high lands between 18°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°30°151015202531
Avg high (°C)Avg low (°C)
11915
21915
31915
41915
51915
61915
72016
82016
92016
102016
112016
122016
132017
142017
152117
162117
172117
182117
192117
202118
212118
222218
232218
242218
252218
262218
272218
282219
292219
302319
312319

How July really feels in Otaru

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.

Otaru weather by month

How July compares with the rest of the year at a glance. July is the 2nd-warmest and 4th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan-3° / -6°9820.824.29.20.0
Feb-2° / -6°791820.210.20.0
Mar / -3°761515.411.60.0
Apr / 6611.2513.10.7
May12° / 8411.70.414.43.0
Jun17° / 12°7610.6015.15.1
Jul21° / 17°12712.8014.95.9
Aug23° / 19°16314.2013.86.0
Sep20° / 16°14913.9012.35.6
Oct14° / 11714.90.610.83.5
Nov / 12918.611.29.50.7
Dec-0° / -3°12621.922.58.90.0

Cloud cover in July

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 19% of the time in July.

Beyond those clear spells, partly cloudy skies cover about 15% of July, with mostly cloudy or overcast conditions the remaining 66%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13763
23565
33565
43664
53565
63466
73565
83565
93565
103565
113565
123466
133466
143466
153466
163466
173367
183367
193367
203367
213367
223367
233367
243367
253367
263367
273367
283466
293565
303565
313763

Chance of precipitation in July

Any precipitation

Otaru gets around 127 mm of rain over 12.8 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 40% and peaks near 41% on the wettest days.

0%10%20%30%40%50%151015202531
Rain chance (%)
135
236
336
437
538
639
740
840
941
1041
1141
1241
1341
1441
1541
1641
1741
1841
1940
2040
2140
2240
2340
2440
2540
2640
2740
2841
2941
3041
3141

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 40% 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 (%)
127502120
224492430
322482630
420472940
519453150
617443450
716423660
814413870
913394080
1012374290
11113544100
12103445110
1393246130
1483147140
1572948160
1662848180
1762648200
1852548220
1942348240
2042248261
2142047281
2231946312
2331845332
2421743353
2521642364
2621540385
2721439405
2821437416
2911336427
3011334439
31113334410

Wind in July

Winds average 9 km/h in July, the calmest month.

Across July, 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 July

DaylightNight

Daylight runs from about 15 h 12 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 48 minutes over July. Sunrise moves from 4:04 AM to 4:29 AM, and sunset from 7:14 PM to 6:55 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
115.24:047:14
215.24:057:14
315.14:057:14
415.14:067:14
515.14:077:14
615.14:077:13
715.14:087:13
815.14:097:13
915.14:097:12
1015.04:107:12
1115.04:117:11
1215.04:117:11
1315.04:127:10
1414.94:137:10
1514.94:147:09
1614.94:157:09
1714.94:157:08
1814.84:167:07
1914.84:177:07
2014.84:187:06
2114.84:197:05
2214.74:207:04
2314.74:217:03
2414.74:227:02
2514.64:237:01
2614.64:247:01
2714.64:257:00
2814.54:266:58
2914.54:276:57
3014.54:286:56
3114.44:296:55

Solar energy in July

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in July, about 5.08 kWh/m².

For context, solar energy here swings from a low near 1.4 kWh/m² to a high of 5.59 kWh/m² in May across the year — July's 5.08 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.3Bright
25.3Bright
35.3Bright
45.3Bright
55.3Bright
65.2Bright
75.2Bright
85.2Bright
95.2Bright
105.2Bright
115.2Bright
125.1Bright
135.1Bright
145.1Bright
155.1Bright
165.1Bright
175.1Bright
185.1Bright
195.1Bright
205.1Bright
215.1Bright
225.0Bright
235.0Bright
245.0Bright
255.0Bright
265.0Bright
275.0Bright
284.9Bright
294.9Bright
304.9Bright
314.9Bright
Planning a trip in July

Hazard calendar for Otaru

In seasonPeak

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

Otaru 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 July a good time to visit Otaru?

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

5.9
Sightseeing
2nd-best month of the year
3.5
Beach & pool
2nd-best month of the year

July is a reasonable time to visit Otaru for sightseeing.

What to pack for Otaru in July

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

In July, Otaru sees daytime highs around 21°C and nights near 17°C. Worth packing: rain gear and sun protection. About 13 days see rain.

rain gearsun protection

Sea temperature near Otaru in July

The nearest coast averages about 19°C in July — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 23 km away) is warmest in August at about 22°C and coldest in February near 6°C.

It's comfortable for a long swim from Jul 31 to Sep 22 — about 1.8 months when the water holds above 20°C.

10°20°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmcomfortable to swim
Sea temperature (°C)Comfort
Jan7Bracing
Feb6Bracing
Mar6Bracing
Apr7Bracing
May10Bracing
Jun14Bracing
Jul19Cool
Aug22Refreshing
Sep21Refreshing
Oct17Cool
Nov13Bracing
Dec9Bracing

UV index in Otaru 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 Otaru 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 8 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighHighVery highHighModerateLowAug 18UV 8Dec 22UV 1
UV index (midday)Level
Jan1Low
Feb2Moderate
Mar3Moderate
Apr5High
May7Very high
Jun7High
Jul5Moderate
Aug8Very high
Sep6High
Oct4Moderate
Nov2Low
Dec1Low

Air quality in Otaru 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 Otaru 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).

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodApr 1121 µg/m³Dec 169 µg/m³
PM2.5 (µg/m³)Level
Jan11Good
Feb15Moderate
Mar21Moderate
Apr21Moderate
May19Moderate
Jun13Moderate
Jul12Moderate
Aug11Good
Sep10Good
Oct12Good
Nov11Good
Dec9Good
Location & terrain

Where is Otaru?

Otaru sits at 43.2°N, 141.0°E, 30 m above sea level, in Japan. The nearest listed city is Yoichi, 19 km away.

Topography around Otaru

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

Within 3 km, the terrain around Otaru has significant variations in elevation — a maximum elevation change of 508 m around an average of 83 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,289 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,867 m.

The land around Otaru is covered by trees (44%), artificial surfaces (32%) and water (23%) within 3 km, water (49%) and trees (46%) within 16 km, and trees (48%) and water (37%) within 80 km.

3 km
508 m
16 km
1,289 m
80 km
1,867 m
treesgrasslandcroplandartificial surfaceswater
July weather nearby: Yoichi 19 km · Ishikari 29 km · Sapporo 31 km · Kutchan 38 km · Tōbetsu 42 km · Ebetsu 45 km · Niseko 50 km · Kitahiroshima 52 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 Otaru (43.1894°, 141.0022°, elevation 30 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).