Noboribetsu weather in September

In September, Noboribetsu sees average daytime highs of 20°C and overnight lows near 15°C, with 177 mm of rain across 13.5 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 21°C in the first days to 18°C by the end. The sky is clear or mostly clear about 26% 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 Noboribetsu's 9th-clearest and 7th-windiest month. For the whole year in context, see Noboribetsu's year-round climate.

Daytime high
20°
3rd warmest
Overnight low
15°
10th coldest
Rainfall
177 mm
13.5 wet days
Daylight
12 h 18 min
5:21 AM – 5:38 PM
Cloud cover
66%
9th clearest
Wind
13 km/h
7th windiest
Solar energy
3.84 kWh/m²
Travel score
5.6
out of 10

Noboribetsu is city in Hokkaidō, Japan.

Density
219/km²
people per km²
Founded
1970

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 21°C in the first days to 18°C by the end.

A typical September day in Noboribetsu reaches about 20°C in the afternoon and slips back to 15°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between 17°C and 22°C. Set against its neighbours, September runs about 2°C cooler than August and about 6°C warmer than October.

10°15°20°25°151015202530
Avg high (°C)Avg low (°C)
12117
22117
32117
42117
52117
62117
72116
82116
92116
102116
112016
122016
132015
142015
152015
162015
172015
181914
191914
201914
211914
221914
231913
241813
251813
261813
271813
281812
291712
301712

How September really feels in Noboribetsu

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.

Noboribetsu 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° / -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°9810.60154.7
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 September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 26% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 14% of September, with mostly cloudy or overcast conditions the remaining 60%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
13565
23466
33466
43466
53565
63565
73565
83565
93763
103763
113763
123763
133961
143961
154060
164060
174159
184159
194258
204357
214357
224357
234456
244456
254456
264654
274654
284654
294654
304555

Chance of precipitation in September

Any precipitation

Noboribetsu gets around 177 mm of rain over 13.5 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 45% and peaks near 48% on the wettest days.

0%20%40%60%151015202530
Rain chance (%)
147
247
347
447
547
648
747
847
947
1047
1147
1246
1346
1445
1545
1644
1744
1844
1943
2043
2143
2243
2343
2443
2542
2642
2742
2842
2942
3041

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 39% of days. Sticky, muggy-or-worse air turns up on roughly 11% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1102638234
2102737224
3112836214
4122935203
5143034193
6153033183
7173132173
8193131162
9213230152
10233229142
11263227132
12293226121
13313224111
14343222101
1538322091
1641321981
1744321771
1846311571
1949311361
2052311250
2155301050
225730940
235930830
246129730
256329620
266528520
276827410
286926410
297125310
307324300

Wind in September

Winds average 13 km/h in September.

Across September, daily wind ranges from about 11 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
111calm
212calm
312calm
412calm
512calm
612calm
712calm
812calm
912calm
1012calm
1112light breeze
1212light breeze
1312light breeze
1412light breeze
1512light breeze
1612light breeze
1713light breeze
1813light breeze
1913light breeze
2013light breeze
2113light breeze
2213light breeze
2313light breeze
2413light breeze
2514light breeze
2614light breeze
2714light breeze
2814light breeze
2914light breeze
3014light 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 5:05 AM to 5:37 AM, and sunset from 6:05 PM to 5:12 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.05:056:05
213.05:066:04
312.95:076:02
412.95:086:00
512.85:095:58
612.85:105:56
712.75:115:55
812.75:125:53
912.65:135:51
1012.65:155:49
1112.55:165:47
1212.55:175:45
1312.45:185:44
1412.45:195:42
1512.35:205:40
1612.35:215:38
1712.25:225:36
1812.25:235:34
1912.15:245:33
2012.15:265:31
2112.05:275:29
2212.05:285:27
2311.95:295:25
2411.95:305:23
2511.85:315:22
2611.85:325:20
2711.75:335:18
2811.75:345:16
2911.65:365:14
3011.65:375:12

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 3.84 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 — September's 3.84 kWh/m² falls in the middle.

012345151015202530
Solar energy (kWh/m²)Level
14.1Bright
24.1Bright
34.1Bright
44.0Bright
54.0Bright
64.0Bright
74.0Moderate
84.0Moderate
93.9Moderate
103.9Moderate
113.9Moderate
123.9Moderate
133.9Moderate
143.9Moderate
153.8Moderate
163.8Moderate
173.8Moderate
183.8Moderate
193.8Moderate
203.8Moderate
213.7Moderate
223.7Moderate
233.7Moderate
243.7Moderate
253.6Moderate
263.6Moderate
273.6Moderate
283.6Moderate
293.5Moderate
303.5Moderate
Planning a trip in September

Hazard calendar for Noboribetsu

In seasonPeak

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

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

Noboribetsu'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 September a good time to visit Noboribetsu?

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
2.7
Beach & pool
3rd-best month of the year

September is a reasonable time to visit Noboribetsu for sightseeing.

What to pack for Noboribetsu in September

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

In September, Noboribetsu sees daytime highs around 20°C and nights near 15°C. Worth packing: rain gear. About 14 days see rain.

rain gear

Sea temperature near Noboribetsu in September

The nearest coast averages about 20°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 21°C and coldest in February near 4°C.

It's comfortable for a long swim from Aug 12 to Sep 10 — about 1 month when the water holds above 20°C.

0°10°20°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarm
Sea temperature (°C)Comfort
Jan7Bracing
Feb4Bracing
Mar4Bracing
Apr6Bracing
May9Bracing
Jun13Bracing
Jul18Cool
Aug21Refreshing
Sep20Cool
Oct16Cool
Nov13Bracing
Dec10Bracing

UV index in Noboribetsu 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 Noboribetsu 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 Noboribetsu 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 Noboribetsu 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 Noboribetsu?

Noboribetsu sits at 42.5°N, 141.2°E, 10 m above sea level, in Japan. The nearest listed city is Shiraoi, 18 km away.

Topography around Noboribetsu

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

Within 3 km, the terrain around Noboribetsu has significant variations in elevation — a maximum elevation change of 289 m around an average of 43 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,217 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,867 m.

The land around Noboribetsu is covered by trees (46%) and water (40%) within 3 km, water (48%) and trees (46%) within 16 km, and trees (46%) and water (42%) within 80 km.

3 km
289 m
16 km
1,217 m
80 km
1,867 m
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Shiraoi 18 km · Muroran 22 km · Date 26 km · Tomakomai 40 km · Chitose 56 km · Niseko 57 km · Eniwa 59 km · Kutchan 61 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 Noboribetsu (42.4522°, 141.1791°, elevation 10 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).