Kushiro weather in September

In September, Kushiro sees average daytime highs of 19°C and overnight lows near 14°C, with 160 mm of rain across 11.5 wet days and about 12.3 hours of daylight. It is the 2nd-warmest and 1st-wettest month of the year here.

Highs ease over the month, from about 20°C in the first days to 17°C by the end. The sky is clear or mostly clear about 24% of the time in September, and the air most often feels dry.

Daylight stretches from about 13 hours at the start of September to 11 h 36 min by month's end. Set against the rest of the year, September is Kushiro's 8th-clearest and 9th-windiest month. For the whole year in context, see Kushiro's year-round climate.

Daytime high
19°
2nd warmest
Overnight low
14°
11th coldest
Rainfall
160 mm
11.5 wet days
Daylight
12 h 18 min
5:08 AM – 5:25 PM
Cloud cover
68%
8th clearest
Wind
13 km/h
9th windiest
Solar energy
3.46 kWh/m²
Travel score
5.6
out of 10

Kushiro is city in Hokkaidō, Japan.

Density
123/km²
people per km²
Founded
2005

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 20°C in the first days to 17°C by the end.

A typical September day in Kushiro reaches about 19°C in the afternoon and slips back to 14°C overnight — a 4°C spread between the day's warmth and the night's chill. On most days the high lands between 16°C and 22°C. Set against its neighbours, September runs about 2°C cooler than August and about 4°C warmer than October.

10°15°20°25°151015202530
Avg high (°C)Avg low (°C)
12016
22016
32016
42016
52016
62016
72016
82016
92015
101915
111915
121915
131915
141915
151915
161914
171914
181914
191814
201814
211814
221813
231813
241813
251813
261713
271712
281712
291712
301712

How September really feels in Kushiro

Once humidity and wind are folded in, September 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

September sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Kushiro weather by month

How September compares with the rest of the year at a glance. September is the 2nd-warmest and 1st-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan-1° / -7°506.269.20.0
Feb-1° / -8°376.26.110.20.0
Mar / -4°688.16.311.60.0
Apr / 859.42.813.10.9
May11° / 10510.50.114.42.6
Jun14° / 10°869.3015.13.9
Jul18° / 14°12610.7014.85.3
Aug20° / 17°14712.1013.85.7
Sep19° / 14°16011.5012.35.6
Oct14° / 1189.50.110.84.3
Nov / 758.61.49.51.5
Dec / -3°718.25.48.90.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 24% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 12% of September, with mostly cloudy or overcast conditions the remaining 63%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
13070
23070
33070
43070
53070
63070
73070
83169
93169
103268
113367
123367
133466
143565
153565
163763
173862
183961
193961
204060
214258
224357
234357
244357
254456
264456
274555
284654
294555
304555

Chance of precipitation in September

Any precipitation

Kushiro gets around 160 mm of rain over 11.5 wet days in September, the wettest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 38% and peaks near 41% on the wettest days.

0%10%20%30%40%50%151015202530
Rain chance (%)
140
240
341
441
541
641
741
841
941
1040
1140
1240
1340
1439
1538
1638
1737
1837
1937
2037
2136
2236
2336
2436
2536
2636
2736
2836
2936
3036

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the dry band about 40% of days. Sticky, muggy-or-worse air turns up on roughly 8% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1133436161
2143535151
3153534141
4163634141
5173633131
6183632131
7203730121
8223729121
9233728111
10253626111
11283625101
12303623101
1332362291
1435362081
1538361871
1641361671
1743351561
1846351351
1949351151
2051341041
215433931
225533831
236032620
246131620
256330520
266629410
276728410
286927310
297225300
307424200

Wind in September

Winds average 13 km/h in September.

Across September, daily wind ranges from about 12 km/h on the calmest days to 15 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202530
Wind speed (km/h)Feels
112light breeze
212light breeze
312light breeze
412light 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
1814light breeze
1914light breeze
2014light breeze
2114light breeze
2214light breeze
2314light breeze
2414light breeze
2514light breeze
2614light breeze
2715light breeze
2815light breeze
2915light breeze
3015light breeze

Sunrise & sunset in September

DaylightNight

Daylight runs from about 13 hours at the start of September to 11 h 36 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 84 minutes over September. Sunrise moves from 4:51 AM to 5:24 AM, and sunset from 5:53 PM to 4:59 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.04:515:53
213.04:525:51
312.94:545:49
412.94:555:48
512.84:565:46
612.84:575:44
712.74:585:42
812.74:595:40
912.65:005:39
1012.65:015:37
1112.55:035:35
1212.55:045:33
1312.45:055:31
1412.45:065:29
1512.35:075:27
1612.35:085:25
1712.25:095:24
1812.25:105:22
1912.15:125:20
2012.15:135:18
2112.05:145:16
2212.05:155:14
2311.95:165:12
2411.95:175:11
2511.85:185:09
2611.85:205:07
2711.75:215:05
2811.75:225:03
2911.65:235:01
3011.65:244:59

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 3.46 kWh/m².

For context, solar energy here swings from a low near 1.83 kWh/m² to a high of 5.12 kWh/m² in May across the year — September's 3.46 kWh/m² falls in the middle.

01234151015202530
Solar energy (kWh/m²)Level
13.7Moderate
23.6Moderate
33.6Moderate
43.6Moderate
53.6Moderate
63.6Moderate
73.6Moderate
83.5Moderate
93.5Moderate
103.5Moderate
113.5Moderate
123.5Moderate
133.5Moderate
143.5Moderate
153.5Moderate
163.5Moderate
173.4Moderate
183.4Moderate
193.4Moderate
203.4Moderate
213.4Moderate
223.4Moderate
233.4Moderate
243.4Moderate
253.3Moderate
263.3Moderate
273.3Moderate
283.3Moderate
293.3Moderate
303.3Moderate
Planning a trip in September

Hazard calendar for Kushiro

In seasonPeak

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

Kushiro 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 September a good time to visit Kushiro?

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

5.6
Sightseeing
2nd-best month of the year
2.2
Beach & pool
2nd-best month of the year

September is a reasonable time to visit Kushiro for sightseeing.

What to pack for Kushiro in September

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

In September, Kushiro sees daytime highs around 19°C and nights near 14°C. Worth packing: rain gear. About 12 days see rain.

rain gear

Sea temperature near Kushiro in September

The nearest coast averages about 17°C in September — 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 17°C and coldest in February near 1°C.

The water stays below 20°C all year — cool enough that most swimmers want a wetsuit.

0°10°20°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshing
Sea temperature (°C)Comfort
Jan3Bracing
Feb1Bracing
Mar1Bracing
Apr3Bracing
May6Bracing
Jun10Bracing
Jul14Bracing
Aug17Cool
Sep17Cool
Oct14Bracing
Nov10Bracing
Dec6Bracing

UV index in Kushiro in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September 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 Kushiro peaks around August 18 at about 8 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near January 1 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 highHighModerateLowAug 18UV 8Jan 1UV 1
UV index (midday)Level
Jan1Low
Feb2Low
Mar3Moderate
Apr5High
May7High
Jun7High
Jul5High
Aug9Very high
Sep6High
Oct4Moderate
Nov2Low
Dec1Low
Location & terrain

Where is Kushiro?

Kushiro sits at 43.0°N, 144.4°E, 6 m above sea level, in Japan. The nearest listed city is Nakashibetsu, 80 km away.

Topography around Kushiro

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

Within 3 km, the terrain around Kushiro has only modest variations in elevation — a maximum elevation change of 65 m around an average of 5 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 151 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,450 m.

The land around Kushiro is covered by water (57%) and artificial surfaces (35%) within 3 km, water (50%) and trees (24%) within 16 km, and trees (49%) and water (34%) within 80 km.

3 km
65 m
16 km
151 m
80 km
1,450 m
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Nakashibetsu 80 km · Sarubetsu 85 km · Obihiro 95 km · Otofuke 96 km · Motomachi 97 km · Shibetsu 98 km · Kitami 100 km · Nemuro 105 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 Kushiro (42.975°, 144.3747°, elevation 6 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. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).