Mitsuke weather in September

In September, Mitsuke sees average daytime highs of 26°C and overnight lows near 17°C, with 156 mm of rain across 15.1 wet days and about 12.3 hours of daylight. It is the 3rd-warmest and 6th-wettest month of the year here.

Highs ease over the month, from about 28°C in the first days to 23°C by the end. The sky is clear or mostly clear about 18% 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 Mitsuke's 6th-clearest and 9th-windiest month. For the whole year in context, see Mitsuke's year-round climate.

Daytime high
26°
3rd warmest
Overnight low
17°
10th coldest
Rainfall
156 mm
15.1 wet days
Daylight
12 h 12 min
5:31 AM – 5:46 PM
Cloud cover
68%
6th clearest
Wind
6 km/h
9th windiest
Solar energy
3.91 kWh/m²
Travel score
5.6
out of 10

Mitsuke is city in Niigata Prefecture, Japan.

Density
554/km²
people per km²
Founded
1889

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 28°C in the first days to 23°C by the end.

A typical September day in Mitsuke reaches about 26°C in the afternoon and slips back to 17°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 21°C and 30°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)
12920
22820
32820
42820
52820
62819
72819
82719
92719
102719
112719
122718
132618
142618
152618
162617
172617
182517
192517
202516
212516
222416
232416
242415
252415
262415
272315
282315
292314
302314

How September really feels in Mitsuke

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.

Mitsuke weather by month

How September compares with the rest of the year at a glance. September is the 3rd-warmest and 6th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -2°20525.720.79.70.0
Feb / -2°14921.517.210.60.1
Mar / 15020.810.611.71.3
Apr16° / 11615.31.312.94.3
May22° / 11°11613.10146.1
Jun25° / 16°14314.1014.55.8
Jul28° / 21°24417.7014.34.6
Aug30° / 22°16915.7013.44.3
Sep26° / 17°15615.1012.35.6
Oct20° / 11°15715.80115.4
Nov13° / 15318.51.3103.0
Dec / -0°2022412.89.50.6

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 18% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 20% of September, with mostly cloudy or overcast conditions the remaining 62%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14159
24258
34258
44258
54258
64357
74258
84258
94258
104159
114159
124060
134060
143961
153961
163961
173763
183862
193763
203664
213664
223565
233565
243565
253466
263466
273466
283466
293466
303565

Chance of precipitation in September

Any precipitation

Mitsuke gets around 156 mm of rain over 15.1 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 51% and peaks near 53% on the wettest days.

0%20%40%60%151015202530
Rain chance (%)
152
252
352
453
553
653
753
853
953
1053
1152
1252
1352
1451
1551
1650
1750
1849
1949
2049
2149
2249
2349
2449
2549
2650
2750
2851
2951
3052

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 32% of days. Sticky, muggy-or-worse air turns up on roughly 44% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1031845321
2031946301
3042146281
4042246271
5052346251
6062446231
7162545221
8172645201
9192744190
102102843170
112112942160
123122941140
134143040130
145153038120
156173136100
16718313490
17920323280
181022323070
191223322860
201325322650
211526322340
221628312130
231829311930
242031311720
252132301520
262333301310
272434291110
282536281010
29273627910
30293726800

Wind in September

Winds average 6 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
126calm
136calm
146calm
156calm
166calm
176calm
186calm
196calm
206calm
216calm
226calm
236calm
246calm
256calm
266calm
276calm
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 5:19 AM to 5:44 AM, and sunset from 6:09 PM to 5:23 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.85:196:09
212.85:196:08
312.85:206:06
412.75:216:05
512.75:226:03
612.65:236:02
712.65:246:00
812.65:255:58
912.55:255:57
1012.55:265:55
1112.45:275:54
1212.45:285:52
1312.45:295:51
1412.35:305:49
1512.35:315:47
1612.25:315:46
1712.25:325:44
1812.25:335:42
1912.15:345:41
2012.15:355:39
2112.05:365:38
2212.05:375:36
2311.95:385:34
2411.95:385:33
2511.95:395:31
2611.85:405:30
2711.85:415:28
2811.75:425:27
2911.75:435:25
3011.75:445:23

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 3.91 kWh/m².

For context, solar energy here swings from a low near 1.7 kWh/m² to a high of 5.54 kWh/m² in May across the year — September's 3.91 kWh/m² falls in the middle.

012345151015202530
Solar energy (kWh/m²)Level
14.4Bright
24.4Bright
34.3Bright
44.3Bright
54.3Bright
64.2Bright
74.2Bright
84.1Bright
94.1Bright
104.1Bright
114.0Bright
124.0Moderate
134.0Moderate
143.9Moderate
153.9Moderate
163.9Moderate
173.8Moderate
183.8Moderate
193.8Moderate
203.7Moderate
213.7Moderate
223.7Moderate
233.6Moderate
243.6Moderate
253.6Moderate
263.6Moderate
273.5Moderate
283.5Moderate
293.5Moderate
303.4Moderate
Planning a trip in September

Hazard calendar for Mitsuke

In seasonPeak

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

Mitsuke 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 Mitsuke?

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

5.6
Sightseeing
3rd-best month of the year
5.3
Beach & pool
4th-best month of the year

September is a reasonable time to visit Mitsuke for sightseeing.

What to pack for Mitsuke in September

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

In September, Mitsuke sees daytime highs around 26°C and nights near 17°C. Pack rain gear. Worth having: light clothes. About 15 days see rain.

rain gearlight clothes

Sea temperature near Mitsuke 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 29 km away) is warmest in August at about 26°C and coldest in March near 10°C.

It's comfortable for a long swim from Jun 21 to Oct 31 — about 4.4 months when the water holds above 20°C.

10°20°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan12Bracing
Feb11Bracing
Mar10Bracing
Apr11Bracing
May15Bracing
Jun19Cool
Jul23Refreshing
Aug26Warm
Sep25Warm
Oct22Refreshing
Nov18Cool
Dec15Cool

UV index in Mitsuke in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 8 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Mitsuke peaks around August 12 at about 10 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 at about 2 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 9 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highModerateAug 12UV 10Dec 22UV 2
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar4Moderate
Apr6High
May8Very high
Jun8Very high
Jul9Very high
Aug10Very high
Sep8Very high
Oct5High
Nov3Moderate
Dec2Low

Air quality in Mitsuke 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 Mitsuke is worst in April — around 23 µg/m³ PM2.5 (moderate), about 2.3× the cleanest month (December, 10 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodApr 1723 µg/m³Dec 1610 µg/m³
PM2.5 (µg/m³)Level
Jan12Good
Feb15Moderate
Mar22Moderate
Apr23Moderate
May22Moderate
Jun19Moderate
Jul17Moderate
Aug14Moderate
Sep12Moderate
Oct12Good
Nov11Good
Dec10Good
Location & terrain

Where is Mitsuke?

Mitsuke sits at 37.5°N, 138.9°E, 48 m above sea level, in Japan. The nearest listed city is Tochio-honchō, 8.0 km away.

Topography around Mitsuke

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

Within 3 km, the terrain around Mitsuke has only modest variations in elevation — a maximum elevation change of 174 m around an average of 48 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 746 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,314 m.

The land around Mitsuke is covered by trees (47%), cropland (29%) and artificial surfaces (20%) within 3 km, trees (49%) and cropland (32%) within 16 km, and trees (54%) and water (33%) within 80 km.

3 km
174 m
16 km
746 m
80 km
2,314 m
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Tochio-honchō 8.0 km · Sanjō 9.0 km · Nagaoka 12 km · Tsubame 15 km · Kamo 17 km · Yoshida-kasugachō 17 km · Maki 24 km · Shirone 27 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 Mitsuke (37.5333°, 138.9333°, elevation 48 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).