Shiraoi weather in October

In October, Shiraoi sees average daytime highs of 14°C and overnight lows near 8°C, with 114 mm of precipitation across 11.1 wet days and about 10.8 hours of daylight. It is the 5th-warmest and 4th-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 35% 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 06 min by month's end. Set against the rest of the year, October is Shiraoi's 1st-clearest and 6th-windiest month. For the whole year in context, see Shiraoi's year-round climate.

Daytime high
14°
5th warmest
Overnight low
8th coldest
Precipitation
114 mm
11.1 wet days
Daylight
10 h 48 min
5:55 AM – 4:44 PM
Cloud cover
55%
1st clearest
Wind
15 km/h
6th windiest
Solar energy
3.08 kWh/m²
Travel score
4.0
out of 10

Shiraoi is town in Shiraoi district, Hokkaidō, Japan.

Density
42/km²
people per km²
Founded
1954

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 Shiraoi reaches about 14°C in the afternoon and slips back to 8°C overnight — a 6°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)
11712
21711
31711
41711
51611
61611
71610
81610
91510
101510
11159
12159
13159
14149
15148
16148
17148
18138
19137
20137
21137
22127
23127
24126
25126
26126
27116
28116
29115
30115
31105

How October really feels in Shiraoi

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.

Shiraoi weather by month

How October compares with the rest of the year at a glance. October is the 5th-warmest and 4th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan-2° / -7°477.18.29.20.0
Feb-1° / -7°456.97.710.30.0
Mar / -4°649.88.711.60.0
Apr / 8210.83.113.10.9
May12° / 11312.20.114.43.0
Jun16° / 12°9810.6015.14.7
Jul20° / 16°14313.3014.85.5
Aug22° / 18°19413.9013.75.8
Sep20° / 15°17713.5012.35.6
Oct14° / 11411.10.110.84.0
Nov / 8410.42.89.60.9
Dec / -5°648.88.68.90.0

Cloud cover in October

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 35% of the time in October, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 20% of October, with mostly cloudy or overcast conditions the remaining 45%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14555
24753
34753
44852
54951
64951
75149
85248
95248
105446
115545
125644
135743
145842
155842
165842
175941
185941
195941
205941
215941
225941
235941
245941
255941
265941
275941
285941
295842
305842
315941

Chance of precipitation in October

Any precipitation

Shiraoi gets around 114 mm of rain and snow over 11.1 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 36% and peaks near 41% on the wettest days, and about 0 day brings snow. The odds ease toward the end of the month.

0%10%20%30%40%50%151015202531
Rain chance (%)
141
241
340
440
539
639
738
838
937
1037
1137
1236
1336
1435
1535
1635
1735
1834
1934
2034
2134
2234
2334
2434
2534
2634
2734
2834
2934
3034
3134

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 92% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)
174233
277212
378202
479192
582171
683161
785141
886131
988111
1089101
119181
129370
139370
149460
159550
169640
179640
189730
199730
209820
219820
229910
239910
249910
259910
269910
2710000
2810000
2910000
3010000
3110000

Wind in October

Winds average 15 km/h in October.

Across October, daily wind ranges from about 14 km/h on the calmest days to 15 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
114light breeze
214light breeze
314light breeze
414light breeze
514light breeze
614light breeze
714light breeze
814light breeze
915light breeze
1015light breeze
1115light breeze
1215light breeze
1315light breeze
1415light breeze
1515light breeze
1615light breeze
1715light breeze
1815light breeze
1915light breeze
2015light breeze
2115light breeze
2215light breeze
2315light breeze
2415light breeze
2515light breeze
2615light breeze
2715light breeze
2815light breeze
2915light breeze
3015light breeze
3115light breeze

Sunrise & sunset in October

DaylightNight

Daylight runs from about 11 h 30 min at the start of October to 10 h 06 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 84 minutes over October. Sunrise moves from 5:37 AM to 6:14 AM, and sunset from 5:10 PM to 4:23 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.55:375:10
211.55:385:08
311.45:405:06
411.45:415:05
511.35:425:03
611.35:435:01
711.35:444:59
811.25:454:58
911.25:474:56
1011.15:484:54
1111.15:494:52
1211.05:504:51
1311.05:514:49
1410.95:534:48
1510.95:544:46
1610.85:554:44
1710.85:564:43
1810.75:574:41
1910.75:594:40
2010.66:004:38
2110.66:014:37
2210.56:024:35
2310.56:044:34
2410.56:054:32
2510.46:064:31
2610.46:074:29
2710.36:094:28
2810.36:104:27
2910.26:114:25
3010.26:124:24
3110.16:144:23

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 1.74 kWh/m² to a high of 5.48 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
23.5Moderate
33.4Moderate
43.4Moderate
53.4Moderate
63.3Moderate
73.3Moderate
83.3Moderate
93.3Moderate
103.3Moderate
113.2Moderate
123.2Moderate
133.2Moderate
143.2Moderate
153.1Moderate
163.1Moderate
173.1Moderate
183.0Moderate
193.0Moderate
203.0Moderate
213.0Moderate
222.9Moderate
232.9Moderate
242.9Moderate
252.8Moderate
262.8Moderate
272.7Moderate
282.7Moderate
292.7Moderate
302.6Moderate
312.6Moderate
Planning a trip in October

Hazard calendar for Shiraoi

In seasonPeak

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

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

Shiraoi'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 Shiraoi?

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

4.0
Sightseeing
5th-best month of the year
0.3
Beach & pool
5th-best month of the year

October is a reasonable time to visit Shiraoi for sightseeing.

What to pack for Shiraoi in October

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

In October, Shiraoi sees daytime highs around 14°C and nights near 8°C. Worth packing: a warm layer and rain gear. About 11 days see rain.

a warm layerrain gear

Sea temperature near Shiraoi in October

The nearest coast averages about 16°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 20 km away) is warmest in August at about 20°C and coldest in March near 4°C.

It's comfortable for a long swim from Aug 17 to Aug 28 — about 0.4 months when the water holds above 20°C.

0°10°20°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarm
Sea temperature (°C)Comfort
Jan6Bracing
Feb4Bracing
Mar4Bracing
Apr5Bracing
May8Bracing
Jun13Bracing
Jul17Cool
Aug20Refreshing
Sep20Cool
Oct16Cool
Nov13Bracing
Dec10Bracing

UV index in Shiraoi 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 Shiraoi 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.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighHighVery highHighModerateLowAug 18UV 8Dec 22UV 1
UV index (midday)Level
Jan1Low
Feb2Moderate
Mar3Moderate
Apr6High
May8Very high
Jun6High
Jul5Moderate
Aug9Very high
Sep6High
Oct4Moderate
Nov2Low
Dec1Low

Air quality in Shiraoi 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 Shiraoi is worst in April — around 20 µg/m³ PM2.5 (moderate), about 2.5× the cleanest month (December, 8 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodApr 1219 µg/m³Dec 158 µg/m³
PM2.5 (µg/m³)Level
Jan10Good
Feb14Moderate
Mar19Moderate
Apr20Moderate
May18Moderate
Jun12Moderate
Jul11Good
Aug10Good
Sep9Good
Oct11Good
Nov9Good
Dec8Good
Location & terrain

Where is Shiraoi?

Shiraoi sits at 42.5°N, 141.3°E, 5 m above sea level, in Japan. The nearest listed city is Noboribetsu, 18 km away.

Topography around Shiraoi

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

Within 3 km, the terrain around Shiraoi has only modest variations in elevation — a maximum elevation change of 114 m around an average of 14 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 1,028 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,858 m.

The land around Shiraoi is covered by water (38%) and trees (35%) within 3 km, trees (47%) and water (46%) within 16 km, and trees (44%) and water (41%) within 80 km.

3 km
114 m
16 km
1,028 m
80 km
1,858 m
treesgrasslandcroplandartificial surfacesbare terrainwater
October weather nearby: Noboribetsu 18 km · Tomakomai 23 km · Chitose 39 km · Muroran 39 km · Date 41 km · Eniwa 42 km · Kitahiroshima 51 km · Sapporo 57 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 Shiraoi (42.55°, 141.35°, elevation 5 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).