Nakashibetsu weather in September

In September, Nakashibetsu sees average daytime highs of 20°C and overnight lows near 13°C, with 152 mm of rain across 12 wet days and about 12.3 hours of daylight. It is the 3rd-warmest and 1st-wettest month of the year here.

Highs ease over the month, from about 21°C in the first days to 18°C by the end. The sky is clear or mostly clear about 19% 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 Nakashibetsu's 9th-clearest and 9th-windiest month. For the whole year in context, see Nakashibetsu's year-round climate.

Daytime high
20°
3rd warmest
Overnight low
13°
10th coldest
Rainfall
152 mm
12 wet days
Daylight
12 h 18 min
5:06 AM – 5:23 PM
Cloud cover
71%
9th clearest
Wind
11 km/h
9th windiest
Solar energy
3.53 kWh/m²
Travel score
5.7
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 21°C in the first days to 18°C by the end.

A typical September day in Nakashibetsu reaches about 20°C in the afternoon and slips back to 13°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 16°C and 24°C. Set against its neighbours, September runs about 2°C cooler than August and about 5°C warmer than October.

10°15°20°25°30°151015202530
Avg high (°C)Avg low (°C)
12215
22215
32215
42115
52115
62115
72114
82114
92114
102114
112114
122114
132013
142013
152013
162013
172012
182012
191912
201912
211912
221911
231911
241811
251811
261811
271810
281810
291810
301710

How September really feels in Nakashibetsu

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.

Nakashibetsu weather by month

How September compares with the rest of the year at a glance. September is the 3rd-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° / -11°547.37.59.10.0
Feb-2° / -12°436.47.310.20.0
Mar / -7°739.58.411.60.0
Apr / -0°8410.94.213.21.7
May14° / 9011.20.514.54.0
Jun17° / 10°749.5015.25.3
Jul21° / 14°10710.4014.96.0
Aug22° / 16°13812.3013.86.0
Sep20° / 13°15212012.35.7
Oct14° / 116100.110.84.3
Nov / 789.42.49.51.3
Dec / -6°728.46.58.80.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 19% 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 66%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
12872
22872
32971
42971
52971
62872
72872
82971
92971
102971
112971
123070
133169
143268
153268
163367
173466
183565
193565
203565
213763
223763
233862
243961
254060
264159
274159
284159
294159
304258

Chance of precipitation in September

Any precipitation

Nakashibetsu gets around 152 mm of rain over 12 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 40% and peaks near 43% on the wettest days.

0%10%20%30%40%50%151015202530
Rain chance (%)
141
241
342
442
542
642
742
842
942
1043
1143
1242
1342
1442
1541
1641
1741
1840
1940
2040
2139
2239
2339
2438
2538
2637
2737
2837
2937
3037

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 48% 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 (%)
1203426172
2213426172
3223426162
4233425152
5243425142
6263424132
7273424122
8293423122
9313422112
10323421102
11353320102
1237331992
1339331882
1442321772
1545321562
1648311462
1750311352
1853301142
1956291041
205928931
216127831
226426721
236625621
246824521
257223410
267521310
277620310
287919200
298117200
308216200

Wind in September

Winds average 11 km/h in September.

Across September, daily wind ranges from about 10 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
110calm
210calm
310calm
410calm
510calm
610calm
710calm
810calm
910calm
1010calm
1110calm
1210calm
1310calm
1410calm
1510calm
1611calm
1711calm
1811calm
1911calm
2011calm
2111calm
2211calm
2311calm
2411calm
2511calm
2611calm
2711calm
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 4:48 AM to 5:22 AM, and sunset from 5:51 PM to 4:57 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.04:485:51
213.04:495:49
313.04:515:48
412.94:525:46
512.94:535:44
612.84:545:42
712.84:555:40
812.74:565:38
912.64:585:37
1012.64:595:35
1112.55:005:33
1212.55:015:31
1312.45:025:29
1412.45:035:27
1512.35:045:25
1612.35:065:23
1712.25:075:21
1812.25:085:19
1912.15:095:18
2012.15:105:16
2112.05:115:14
2212.05:135:12
2311.95:145:10
2411.95:155:08
2511.85:165:06
2611.85:175:04
2711.75:185:02
2811.75:205:01
2911.65:214:59
3011.65:224:57

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 3.53 kWh/m².

For context, solar energy here swings from a low near 1.74 kWh/m² to a high of 5.17 kWh/m² in May across the year — September's 3.53 kWh/m² falls in the middle.

01234151015202530
Solar energy (kWh/m²)Level
13.8Moderate
23.8Moderate
33.7Moderate
43.7Moderate
53.7Moderate
63.7Moderate
73.7Moderate
83.6Moderate
93.6Moderate
103.6Moderate
113.6Moderate
123.6Moderate
133.6Moderate
143.5Moderate
153.5Moderate
163.5Moderate
173.5Moderate
183.5Moderate
193.5Moderate
203.5Moderate
213.4Moderate
223.4Moderate
233.4Moderate
243.4Moderate
253.4Moderate
263.3Moderate
273.3Moderate
283.3Moderate
293.3Moderate
303.3Moderate
Planning a trip in September

Hazard calendar for Nakashibetsu

In seasonPeak

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

Nakashibetsu 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 Nakashibetsu?

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

5.7
Sightseeing
3rd-best month of the year
2.9
Beach & pool
3rd-best month of the year

September is a reasonable time to visit Nakashibetsu for sightseeing.

What to pack for Nakashibetsu in September

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

In September, Nakashibetsu sees daytime highs around 20°C and nights near 13°C. Worth packing: rain gear. About 12 days see rain.

rain gear

Sea temperature near Nakashibetsu 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 at the nearest coast (about 15 km away) 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 Nakashibetsu 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 Nakashibetsu peaks around August 17 at about 8 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 20 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 highModerateLowAug 17UV 8Dec 20UV 1
UV index (midday)Level
Jan1Low
Feb2Moderate
Mar3Moderate
Apr5High
May7Very high
Jun7High
Jul6High
Aug9Very high
Sep6High
Oct4Moderate
Nov2Low
Dec1Low
Location & terrain

Where is Nakashibetsu?

Nakashibetsu sits at 43.5°N, 145.0°E, 31 m above sea level, in Japan. The nearest listed city is Shibetsu, 18 km away.

EngaruSarubetsu

Topography around Nakashibetsu

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

Within 3 km, the terrain around Nakashibetsu has only modest variations in elevation — a maximum elevation change of 70 m around an average of 52 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 977 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,608 m.

The land around Nakashibetsu is covered by trees (47%), grassland (21%) and artificial surfaces (20%) within 3 km, trees (42%), cropland (36%) and grassland (20%) within 16 km, and water (47%) and trees (37%) within 80 km.

3 km
70 m
16 km
977 m
80 km
1,608 m
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Shibetsu 18 km · Nemuro 55 km · Motomachi 77 km · Abashiri 77 km · Kushiro 80 km · Kitami 91 km · Engaru 127 km · Sarubetsu 152 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 Nakashibetsu (43.5485°, 144.9718°, elevation 31 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).