Tōbetsu weather in September

In September, Tōbetsu sees average daytime highs of 21°C and overnight lows near 14°C, with 136 mm of rain across 13.7 wet days and about 12.3 hours of daylight. It is the 3rd-warmest and 2nd-wettest month of the year here.

Highs ease over the month, from about 23°C in the first days to 19°C by the end. The sky is clear or mostly clear about 28% 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 Tōbetsu's 5th-clearest and 9th-windiest month. For the whole year in context, see Tōbetsu's year-round climate.

Daytime high
21°
3rd warmest
Overnight low
14°
10th coldest
Rainfall
136 mm
13.7 wet days
Daylight
12 h 18 min
5:20 AM – 5:37 PM
Cloud cover
64%
5th clearest
Wind
10 km/h
9th windiest
Solar energy
3.68 kWh/m²
Travel score
5.8
out of 10

Tōbetsu is town in Ishikari District, Hokkaido, Japan.

Density
39/km²
people per km²
Founded
1947

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 23°C in the first days to 19°C by the end.

A typical September day in Tōbetsu reaches about 21°C in the afternoon and slips back to 14°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 18°C and 24°C. Set against its neighbours, September runs about 3°C cooler than August and about 6°C warmer than October.

10°15°20°25°30°151015202530
Avg high (°C)Avg low (°C)
12317
22317
32317
42317
52317
62316
72316
82216
92216
102216
112216
122215
132215
142115
152115
162114
172114
182114
192014
202013
212013
222013
232013
242012
251912
261912
271912
281912
291911
301811

How September really feels in Tōbetsu

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.

Tōbetsu weather by month

How September compares with the rest of the year at a glance. September is the 3rd-warmest and 2nd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan-2° / -8°5313.819.79.20.0
Feb-1° / -8°4511.616.610.20.0
Mar / -4°5811.611.411.60.0
Apr10° / 6511.1313.22.2
May16° / 8511.40.114.44.7
Jun19° / 13°7510.1015.16.0
Jul23° / 17°12612.5014.96.3
Aug24° / 19°17113.7013.86.2
Sep21° / 14°13613.7012.35.8
Oct15° / 9413.50.210.84.2
Nov / 9317.18.39.51.0
Dec / -5°7616.519.78.90.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 28% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 16% of September, with mostly cloudy or overcast conditions the remaining 56%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
13961
23961
33961
44060
54060
64060
74060
84060
94060
104159
114258
124258
134258
144456
154456
164555
174555
184555
194555
204753
214753
224753
234753
244852
254852
264753
274852
284852
294852
304753

Chance of precipitation in September

Any precipitation

Tōbetsu gets around 136 mm of rain over 13.7 wet days in September. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 46% and peaks near 47% on the wettest days.

0%20%40%60%151015202530
Rain chance (%)
146
246
346
446
546
645
745
845
945
1045
1145
1245
1345
1445
1545
1645
1745
1845
1945
2045
2146
2246
2346
2447
2547
2647
2747
2847
2946
3046

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 38% of days. Sticky, muggy-or-worse air turns up on roughly 12% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
182436265
292536245
3102636235
4112736215
5132835204
6142935194
7162934174
8183033164
9203131143
10223230133
11243229123
12273327113
13293325102
1432332492
1535342282
1638342072
1741341861
1844341661
1946341451
2049331341
2151331141
225433931
235632831
245931721
256230620
266529510
276728410
286927310
297225300
307424200

Wind in September

Winds average 10 km/h in September.

Across September, daily wind ranges from about 9 km/h on the calmest days to 11 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
19calm
29calm
39calm
49calm
59calm
69calm
79calm
89calm
910calm
1010calm
1110calm
1210calm
1310calm
1410calm
1510calm
1610calm
1710calm
1810calm
1910calm
2010calm
2110calm
2210calm
2310calm
2410calm
2510calm
2610calm
2710calm
2811calm
2911calm
3011calm

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 5:03 AM to 5:36 AM, and sunset from 6:05 PM to 5:11 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.05:036:05
213.05:046:03
312.95:056:01
412.95:065:59
512.85:075:57
612.85:085:56
712.75:095:54
812.75:105:52
912.65:125:50
1012.65:135:48
1112.55:145:46
1212.55:155:44
1312.45:165:43
1412.45:175:41
1512.35:185:39
1612.35:205:37
1712.25:215:35
1812.25:225:33
1912.15:235:31
2012.15:245:29
2112.05:255:28
2212.05:265:26
2311.95:285:24
2411.95:295:22
2511.85:305:20
2611.85:315:18
2711.75:325:16
2811.75:335:14
2911.65:355:13
3011.65:365:11

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 3.68 kWh/m².

For context, solar energy here swings from a low near 1.58 kWh/m² to a high of 5.43 kWh/m² in May across the year — September's 3.68 kWh/m² falls in the middle.

012345151015202530
Solar energy (kWh/m²)Level
14.0Bright
24.0Bright
34.0Moderate
44.0Moderate
53.9Moderate
63.9Moderate
73.9Moderate
83.9Moderate
93.8Moderate
103.8Moderate
113.8Moderate
123.8Moderate
133.7Moderate
143.7Moderate
153.7Moderate
163.6Moderate
173.6Moderate
183.6Moderate
193.6Moderate
203.6Moderate
213.5Moderate
223.5Moderate
233.5Moderate
243.5Moderate
253.4Moderate
263.4Moderate
273.4Moderate
283.3Moderate
293.3Moderate
303.3Moderate
Planning a trip in September

Hazard calendar for Tōbetsu

In seasonPeak

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

Tōbetsu 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 Tōbetsu?

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

5.8
Sightseeing
4th-best month of the year
3.6
Beach & pool
3rd-best month of the year

September is a reasonable time to visit Tōbetsu for sightseeing.

What to pack for Tōbetsu in September

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

In September, Tōbetsu sees daytime highs around 21°C and nights near 14°C. Pack rain gear. About 14 days see rain.

rain gear

Sea temperature near Tōbetsu in September

The nearest coast averages about 21°C in September — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 21 km away) is warmest in August at about 22°C and coldest in February near 5°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
Feb5Bracing
Mar5Bracing
Apr7Bracing
May10Bracing
Jun14Bracing
Jul19Cool
Aug22Refreshing
Sep21Refreshing
Oct17Cool
Nov13Bracing
Dec9Bracing

UV index in Tōbetsu 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 Tōbetsu peaks around August 18 at about 8 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 19 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 19UV 1
UV index (midday)Level
Jan1Low
Feb3Moderate
Mar3Moderate
Apr6High
May7Very high
Jun7High
Jul5Moderate
Aug8Very high
Sep6High
Oct4Moderate
Nov2Low
Dec1Low

Air quality in Tōbetsu in September

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where September falls, not just the annual average.

Air quality in Tōbetsu 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 1220 µg/m³Dec 159 µg/m³
PM2.5 (µg/m³)Level
Jan11Good
Feb15Moderate
Mar20Moderate
Apr21Moderate
May19Moderate
Jun14Moderate
Jul13Moderate
Aug11Good
Sep11Good
Oct12Good
Nov10Good
Dec9Good
Location & terrain

Where is Tōbetsu?

Tōbetsu sits at 43.2°N, 141.5°E, 14 m above sea level, in Japan. The nearest listed city is Ebetsu, 12 km away.

Topography around Tōbetsu

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

Within 3 km, the terrain around Tōbetsu has only modest variations in elevation — a maximum elevation change of 76 m around an average of 15 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 414 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,859 m.

The land around Tōbetsu is covered by cropland (72%) within 3 km, cropland (48%) and trees (28%) within 16 km, and trees (60%) and water (22%) within 80 km.

3 km
76 m
16 km
414 m
80 km
1,859 m
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Ebetsu 12 km · Ishikari 13 km · Iwamizawa 20 km · Sapporo 22 km · Kitahiroshima 27 km · Bibai 30 km · Eniwa 36 km · Otaru 42 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 Tōbetsu (43.2169°, 141.5169°, elevation 14 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).