Gohyakkoku weather in September

In September, Gohyakkoku sees average daytime highs of 25°C and overnight lows near 19°C, with 211 mm of rain across 15.6 wet days and about 12.2 hours of daylight. It is the 3rd-warmest and 3rd-wettest month of the year here.

Highs ease over the month, from about 27°C in the first days to 23°C by the end. The sky is clear or mostly clear about 24% of the time in September, and the air most often feels muggy.

Daylight stretches from about 12 h 48 min at the start of September to 11 h 42 min by month's end. Set against the rest of the year, September is Gohyakkoku's 7th-clearest and 11th-windiest month. For the whole year in context, see Gohyakkoku's year-round climate.

Daytime high
25°
3rd warmest
Overnight low
19°
10th coldest
Rainfall
211 mm
15.6 wet days
Daylight
12 h 12 min
5:38 AM – 5:52 PM
Cloud cover
66%
7th clearest
Wind
7 km/h
11th windiest
Solar energy
4.04 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 27°C in the first days to 23°C by the end.

A typical September day in Gohyakkoku reaches about 25°C in the afternoon and slips back to 19°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 21°C and 29°C. Set against its neighbours, September runs about 4°C cooler than August and about 6°C warmer than October.

10°15°20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
12721
22721
32721
42721
52721
62721
72621
82620
92620
102620
112620
122620
132520
142519
152519
162519
172519
182419
192418
202418
212418
222418
232317
242317
252317
262317
272317
282316
292216
302216

How September really feels in Gohyakkoku

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.

Gohyakkoku weather by month

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

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -0°21022.917.99.80.0
Feb / -0°16419.114.610.60.1
Mar / 17918.98.811.71.5
Apr15° / 15014.51.312.94.2
May21° / 13°15614.6013.95.8
Jun24° / 18°20015.4014.55.7
Jul28° / 22°27318.6014.34.8
Aug29° / 23°17815.8013.44.8
Sep25° / 19°21115.6012.25.7
Oct19° / 13°18014.6011.15.5
Nov14° / 16916.81.2103.3
Dec / 2142210.89.50.9

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 18% of September, with mostly cloudy or overcast conditions the remaining 59%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14258
24258
34159
44258
54258
64258
74258
84258
94357
104357
114456
124456
134357
144357
154357
164258
174258
184159
194159
204159
214159
224060
234060
244060
254060
264060
274060
283961
293961
304060

Chance of precipitation in September

Any precipitation

Gohyakkoku gets around 211 mm of rain over 15.6 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 52% and peaks near 56% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
154
255
355
456
556
656
756
856
956
1056
1156
1255
1355
1454
1553
1652
1752
1851
1950
2050
2149
2249
2349
2448
2548
2648
2748
2849
2949
3049

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the muggy band about 36% of days. Sticky, muggy-or-worse air turns up on roughly 49% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1021551311
2021652291
3031751281
4031951261
5042050251
6042151231
7052350220
8152449200
9162549190
10172648170
11182847160
12292946140
132113044130
143123143120
154133241100
16415323990
17516333780
18618343570
19720343360
20821343160
21923342950
221125342640
231226342440
241328342230
251430332030
261531331820
271733321620
281834321520
291935311310
302136311210

Wind in September

Winds average 7 km/h in September.

Across September, daily wind ranges from about 6 km/h on the calmest days to 7 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
16calm
26calm
36calm
46calm
56calm
66calm
76calm
86calm
96calm
106calm
116calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 48 min at the start of September to 11 h 42 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 66 minutes over September. Sunrise moves from 5:26 AM to 5:50 AM, and sunset from 6:15 PM to 5:30 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.85:266:15
212.85:276:14
312.75:276:12
412.75:286:11
512.75:296:09
612.65:306:08
712.65:316:06
812.55:326:04
912.55:326:03
1012.55:336:01
1112.45:346:00
1212.45:355:58
1312.35:365:57
1412.35:375:55
1512.35:375:54
1612.25:385:52
1712.25:395:50
1812.25:405:49
1912.15:415:47
2012.15:415:46
2112.05:425:44
2212.05:435:43
2311.95:445:41
2411.95:455:39
2511.95:465:38
2611.85:475:36
2711.85:475:35
2811.75:485:33
2911.75:495:32
3011.75:505:30

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.04 kWh/m².

For context, solar energy here swings from a low near 1.94 kWh/m² to a high of 5.68 kWh/m² in May across the year — September's 4.04 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
14.5Bright
24.5Bright
34.5Bright
44.4Bright
54.4Bright
64.3Bright
74.3Bright
84.2Bright
94.2Bright
104.2Bright
114.1Bright
124.1Bright
134.1Bright
144.0Bright
154.0Bright
164.0Moderate
174.0Moderate
183.9Moderate
193.9Moderate
203.9Moderate
213.9Moderate
223.9Moderate
233.8Moderate
243.8Moderate
253.8Moderate
263.8Moderate
273.7Moderate
283.7Moderate
293.7Moderate
303.6Moderate
Planning a trip in September

Hazard calendar for Gohyakkoku

In seasonPeak

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

Gohyakkoku 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 Gohyakkoku?

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

5.7
Sightseeing
2nd-best month of the year
5.1
Beach & pool
3rd-best month of the year

September is a reasonable time to visit Gohyakkoku for sightseeing.

What to pack for Gohyakkoku in September

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

In September, Gohyakkoku sees daytime highs around 25°C and nights near 19°C. Pack rain gear. Worth having: light clothes. About 16 days see rain.

rain gearlight clothes

Sea temperature near Gohyakkoku in September

The nearest coast averages about 25°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 24 km away) is warmest in August at about 27°C and coldest in March near 10°C.

It's comfortable for a long swim from Jun 18 to Nov 3 — about 4.6 months when the water holds above 20°C.

10°20°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan13Bracing
Feb11Bracing
Mar10Bracing
Apr11Bracing
May15Cool
Jun20Cool
Jul24Refreshing
Aug27Warm
Sep25Warm
Oct22Refreshing
Nov19Cool
Dec16Cool

UV index in Gohyakkoku in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 9 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Gohyakkoku peaks around August 13 at about 10 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 20 at about 2 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 10 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highModerateAug 13UV 10Dec 20UV 2
UV index (midday)Level
Jan2Moderate
Feb4Moderate
Mar5Moderate
Apr6High
May8Very high
Jun9Very high
Jul10Very high
Aug10Very high
Sep9Very high
Oct6High
Nov3Moderate
Dec2Moderate

Air quality in Gohyakkoku 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 Gohyakkoku is worst in April — around 21 µg/m³ PM2.5 (moderate), about 2.4× the cleanest month (December, 9 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodApr 1621 µg/m³Dec 139 µg/m³
PM2.5 (µg/m³)Level
Jan10Good
Feb13Moderate
Mar20Moderate
Apr21Moderate
May20Moderate
Jun18Moderate
Jul14Moderate
Aug12Good
Sep10Good
Oct10Good
Nov10Good
Dec9Good
Location & terrain

Where is Gohyakkoku?

Gohyakkoku sits at 36.7°N, 137.3°E, 70 m above sea level, in Japan. The nearest listed city is Kamiichi, 6.0 km away.

Topography around Gohyakkoku

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

Within 3 km, the terrain around Gohyakkoku has only modest variations in elevation — a maximum elevation change of 124 m around an average of 68 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,371 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,123 m.

The land around Gohyakkoku is covered by cropland (68%) and artificial surfaces (23%) within 3 km, trees (44%), cropland (24%) and artificial surfaces (20%) within 16 km, and trees (61%) and water (27%) within 80 km.

3 km
124 m
16 km
1,371 m
80 km
3,123 m
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Kamiichi 6.0 km · Toyama 10 km · Namerikawa 11 km · Uozu 17 km · Yatsuomachi-higashikumisaka 20 km · Imizu 21 km · Nishishinminato 25 km · Takaoka 28 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 Gohyakkoku (36.6641°, 137.3167°, elevation 70 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).