Shibetsu weather in September

In September, Shibetsu sees average daytime highs of 19°C and overnight lows near 13°C, with 166 mm of rain across 12.5 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 21% of the time in September, and the air most often feels dry.

Daylight stretches from about 13 h 06 min at the start of September to 11 h 36 min by month's end. Set against the rest of the year, September is Shibetsu's 8th-clearest and 9th-windiest month. For the whole year in context, see Shibetsu's year-round climate.

Daytime high
19°
2nd warmest
Overnight low
13°
10th coldest
Rainfall
166 mm
12.5 wet days
Daylight
12 h 18 min
5:05 AM – 5:23 PM
Cloud cover
70%
8th clearest
Wind
13 km/h
9th windiest
Solar energy
3.61 kWh/m²
Travel score
5.5
out of 10

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 Shibetsu reaches about 19°C in the afternoon and slips back to 13°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between 15°C and 22°C. Set against its neighbours, September runs about 2°C cooler than August and about 5°C warmer than October.

10°15°20°25°151015202530
Avg high (°C)Avg low (°C)
12015
22015
32015
42015
52015
62015
72015
82015
92015
102014
111914
121914
131914
141914
151914
161913
171913
181913
191813
201813
211813
221812
231812
241812
251712
261712
271711
281711
291711
301711

How September really feels in Shibetsu

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.

Shibetsu 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-3° / -9°598.710.79.10.0
Feb-3° / -10°486.97.710.20.0
Mar / -6°769.8911.60.0
Apr / -0°8611.2513.20.7
May11° / 9611.20.614.52.8
Jun15° / 8310.1015.24.3
Jul18° / 13°11511.1014.95.5
Aug21° / 16°15012.4013.85.7
Sep19° / 13°16612.5012.35.5
Oct14° / 12711.10.110.83.9
Nov / 8711.22.99.51.0
Dec / -5°789.79.68.80.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 21% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 15% of September, with mostly cloudy or overcast conditions the remaining 65%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
13070
23070
32971
42971
53070
63070
73070
83070
93268
103268
113268
123268
133367
143367
153565
163565
173664
183664
193763
203862
213862
224060
234060
244159
254159
264357
274357
284357
294456
304555

Chance of precipitation in September

Any precipitation

Shibetsu gets around 166 mm of rain over 12.5 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 41% and peaks near 43% on the wettest days.

0%10%20%30%40%50%151015202530
Rain chance (%)
141
241
341
442
542
642
742
842
943
1043
1143
1243
1343
1442
1542
1642
1742
1841
1941
2041
2141
2241
2341
2441
2540
2640
2740
2840
2940
3040

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 50% of days. Sticky, muggy-or-worse air turns up on roughly 6% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1223629131
2233629121
3243628121
4253627111
5263527111
6283526101
7293525101
831352491
932352491
1034342391
1136342180
1239342070
1341331970
1443331760
1546321660
1649311550
1752311340
1854301240
1958291030
206028930
216327820
226625720
236824620
247123510
257322410
267521310
277820200
287919200
298117200
308316100

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 14 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
512light breeze
612light breeze
712light breeze
812light 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
2214light breeze
2314light breeze
2414light breeze
2514light breeze
2614light breeze
2714light breeze
2814light breeze
2914light breeze
3014light breeze

Sunrise & sunset in September

DaylightNight

Daylight runs from about 13 h 06 min 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 90 minutes over September. Sunrise moves from 4:48 AM to 5:21 AM, and sunset from 5:51 PM to 4:56 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.14:485:51
213.04:495:49
313.04:505:47
412.94:515:45
512.94:525:43
612.84:535:42
712.84:555:40
812.74:565:38
912.74:575:36
1012.64:585:34
1112.64:595:32
1212.55:005:30
1312.45:015:28
1412.45:035:26
1512.35:045:25
1612.35:055:23
1712.25:065:21
1812.25:075:19
1912.15:085:17
2012.15:105:15
2112.05:115:13
2212.05:125:11
2311.95:135:09
2411.95:145:07
2511.85:165:05
2611.85:175:04
2711.75:185:02
2811.75:195:00
2911.65:204:58
3011.65:214:56

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 3.61 kWh/m².

For context, solar energy here swings from a low near 1.64 kWh/m² to a high of 5.21 kWh/m² in May across the year — September's 3.61 kWh/m² falls in the middle.

01234151015202530
Solar energy (kWh/m²)Level
13.9Moderate
23.9Moderate
33.9Moderate
43.8Moderate
53.8Moderate
63.8Moderate
73.8Moderate
83.7Moderate
93.7Moderate
103.7Moderate
113.7Moderate
123.7Moderate
133.6Moderate
143.6Moderate
153.6Moderate
163.6Moderate
173.6Moderate
183.5Moderate
193.5Moderate
203.5Moderate
213.5Moderate
223.5Moderate
233.5Moderate
243.4Moderate
253.4Moderate
263.4Moderate
273.4Moderate
283.3Moderate
293.3Moderate
303.3Moderate
Planning a trip in September

Hazard calendar for Shibetsu

In seasonPeak

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

Shibetsu 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 Shibetsu?

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

5.5
Sightseeing
2nd-best month of the year
2.2
Beach & pool
2nd-best month of the year

September is a reasonable time to visit Shibetsu for sightseeing.

What to pack for Shibetsu in September

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

In September, Shibetsu sees daytime highs around 19°C and nights near 13°C. Worth packing: rain gear. About 13 days see rain.

rain gear

Sea temperature near Shibetsu 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 September at about 17°C and coldest in February near -0°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
Jan2Bracing
Feb0Bracing
Mar0Bracing
Apr2Bracing
May5Bracing
Jun9Bracing
Jul13Bracing
Aug17Cool
Sep17Cool
Oct14Bracing
Nov10Bracing
Dec5Bracing

UV index in Shibetsu 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 Shibetsu peaks around August 17 at about 9 (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 highModerateLowAug 17UV 9Dec 22UV 1
UV index (midday)Level
Jan1Low
Feb2Low
Mar3Moderate
Apr5Moderate
May7High
Jun7High
Jul6High
Aug9Very high
Sep6High
Oct4Moderate
Nov2Low
Dec1Low
Location & terrain

Where is Shibetsu?

Shibetsu sits at 43.7°N, 145.1°E, 2 m above sea level, in Japan. The nearest listed city is Nakashibetsu, 18 km away.

EngaruMombetsu

Topography around Shibetsu

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

Within 3 km, the terrain around Shibetsu has only modest variations in elevation — a maximum elevation change of 35 m around an average of 6 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 482 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,608 m.

The land around Shibetsu is covered by water (43%) and trees (31%) within 3 km, water (45%) and trees (27%) within 16 km, and water (55%) and trees (31%) within 80 km.

3 km
35 m
16 km
482 m
80 km
1,608 m
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Nakashibetsu 18 km · Nemuro 52 km · Abashiri 80 km · Motomachi 85 km · Kushiro 98 km · Kitami 101 km · Engaru 134 km · Mombetsu 162 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 Shibetsu (43.659°, 145.132°, elevation 2 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).