Narutochō-mitsuishi weather in September

In September, Narutochō-mitsuishi sees average daytime highs of 27°C and overnight lows near 22°C, with 209 mm of rain across 12.5 wet days and about 12.2 hours of daylight. It is the 3rd-warmest and 2nd-wettest month of the year here.

Highs ease over the month, from about 28°C in the first days to 25°C by the end. The sky is clear or mostly clear about 34% of the time in September, and the air most often feels oppressive.

Daylight stretches from about 12 h 42 min at the start of September to 11 h 42 min by month's end. Set against the rest of the year, September is Narutochō-mitsuishi's 9th-clearest and 8th-windiest month. For the whole year in context, see Narutochō-mitsuishi's year-round climate.

Daytime high
27°
3rd warmest
Overnight low
22°
10th coldest
Rainfall
209 mm
12.5 wet days
Daylight
12 h 12 min
5:50 AM – 6:02 PM
Cloud cover
60%
9th clearest
Wind
12 km/h
8th windiest
Solar energy
4.16 kWh/m²
Travel score
6.1
out of 10

Narutochō-mitsuishi is human settlement in Japan.

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 25°C by the end.

A typical September day in Narutochō-mitsuishi reaches about 27°C in the afternoon and slips back to 22°C overnight — a 4°C spread between the day's warmth and the night's chill. On most days the high lands between 24°C and 29°C. Set against its neighbours, September runs about 3°C cooler than August and about 5°C warmer than October.

15°20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
12924
22924
32824
42824
52824
62824
72824
82823
92823
102723
112723
122723
132723
142722
152722
162722
172622
182622
192622
202621
212621
222621
232521
242521
252521
262520
272520
282520
292420
302420

How September really feels in Narutochō-mitsuishi

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.

Narutochō-mitsuishi 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 / 639.50.6102.0
Feb10° / 699.7110.72.2
Mar13° / 10511.3011.73.6
Apr17° / 11°11710.1012.85.6
May21° / 16°14310.4013.86.4
Jun24° / 20°21113.6014.25.9
Jul28° / 24°20313.50145.3
Aug30° / 25°12710.5013.35.1
Sep27° / 22°20912.5012.26.1
Oct22° / 17°17810.1011.16.7
Nov17° / 12°837.8010.25.6
Dec12° / 6990.19.83.2

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 34% 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 51%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14951
24951
34951
44951
54951
64951
74951
84951
94951
104951
114951
124951
134951
144852
154852
164852
174852
184852
194852
204951
214951
224852
234852
244951
255050
264951
274951
284951
294951
304951

Chance of precipitation in September

Any precipitation

Narutochō-mitsuishi gets around 209 mm of rain over 12.5 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 41% and peaks near 43% on the wettest days.

0%10%20%30%40%50%151015202530
Rain chance (%)
142
242
343
443
543
643
743
843
943
1043
1143
1242
1342
1441
1541
1641
1740
1840
1940
2040
2140
2240
2340
2440
2540
2640
2740
2840
2940
3040

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the oppressive band about 32% of days. Sticky, muggy-or-worse air turns up on roughly 67% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1006245317
2017255116
3017275114
4018285013
5019294912
60210304811
70211314710
8021231459
9031332448
10131433428
11141533407
12141633397
13151833376
14161933355
15272132335
16282232314
17392432294
183102531274
193112730263
204122830243
214132929223
225143028202
235153127192
246163227172
256173326161
267183425151
277193525131
288203524121
299213623111
3010223622100

Wind in September

Winds average 12 km/h in September.

Across September, daily wind ranges from about 11 km/h on the calmest days to 13 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
111calm
211calm
311calm
411calm
511calm
612calm
712calm
812calm
912calm
1012calm
1112calm
1212calm
1312light breeze
1412light breeze
1512light breeze
1612light breeze
1712light breeze
1812light breeze
1912light breeze
2012light breeze
2113light breeze
2213light breeze
2313light breeze
2413light breeze
2513light breeze
2613light breeze
2713light breeze
2813light breeze
2913light breeze
3013light breeze

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 42 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 60 minutes over September. Sunrise moves from 5:39 AM to 6:00 AM, and sunset from 6:24 PM to 5:42 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.75:396:24
212.75:406:22
312.75:406:21
412.65:416:20
512.65:426:18
612.65:426:17
712.55:436:15
812.55:446:14
912.55:456:12
1012.45:456:11
1112.45:466:09
1212.45:476:08
1312.35:476:07
1412.35:486:05
1512.25:496:04
1612.25:506:02
1712.25:506:01
1812.15:515:59
1912.15:525:58
2012.15:525:56
2112.05:535:55
2212.05:545:53
2312.05:555:52
2411.95:555:50
2511.95:565:49
2611.85:575:48
2711.85:585:46
2811.85:585:45
2911.75:595:43
3011.76:005:42

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.16 kWh/m².

For context, solar energy here swings from a low near 2.49 kWh/m² to a high of 5.56 kWh/m² in May across the year — September's 4.16 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
14.7Bright
24.7Bright
34.6Bright
44.6Bright
54.6Bright
64.5Bright
74.5Bright
84.4Bright
94.4Bright
104.4Bright
114.3Bright
124.3Bright
134.3Bright
144.2Bright
154.2Bright
164.2Bright
174.1Bright
184.1Bright
194.1Bright
204.0Bright
214.0Bright
224.0Moderate
234.0Moderate
243.9Moderate
253.9Moderate
263.9Moderate
273.8Moderate
283.8Moderate
293.8Moderate
303.8Moderate
Planning a trip in September

Hazard calendar for Narutochō-mitsuishi

In seasonPeak

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

Narutochō-mitsuishi 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 Narutochō-mitsuishi?

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

6.1
Sightseeing
3rd-best month of the year
6.1
Beach & pool
3rd-best month of the year

September is a reasonable time to visit Narutochō-mitsuishi for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Narutochō-mitsuishi in September

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

In September, Narutochō-mitsuishi sees daytime highs around 27°C and nights near 22°C. Worth packing: light clothes and rain gear. About 13 days see rain.

light clothesrain gear

Sea temperature near Narutochō-mitsuishi in September

The nearest coast averages about 26°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 27°C and coldest in February near 14°C.

It's comfortable for a long swim from Jun 5 to Nov 19 — about 5.5 months when the water holds above 20°C.

10°15°20°25°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan15Cool
Feb14Bracing
Mar14Bracing
Apr16Cool
May18Cool
Jun21Refreshing
Jul25Warm
Aug27Warm
Sep26Warm
Oct24Refreshing
Nov20Refreshing
Dec17Cool

UV index in Narutochō-mitsuishi 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 Narutochō-mitsuishi peaks around July 10 at about 10 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 at about 3 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highExtremeVery highModerateJul 10UV 10Dec 22UV 3
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar6High
Apr7Very high
May9Very high
Jun10Very high
Jul10Extreme
Aug8Very high
Sep9Very high
Oct6High
Nov4Moderate
Dec3Moderate

Air quality in Narutochō-mitsuishi 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 Narutochō-mitsuishi is worst in April — around 23 µg/m³ PM2.5 (moderate), about 1.8× the cleanest month (October, 12 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateApr 1422 µg/m³Oct 1613 µg/m³
PM2.5 (µg/m³)Level
Jan15Moderate
Feb17Moderate
Mar21Moderate
Apr23Moderate
May20Moderate
Jun18Moderate
Jul15Moderate
Aug15Moderate
Sep13Moderate
Oct12Moderate
Nov13Moderate
Dec13Moderate
Location & terrain

Where is Narutochō-mitsuishi?

Narutochō-mitsuishi sits at 34.2°N, 134.6°E, 2 m above sea level, in Japan. The nearest listed city is Takabō, 11 km away.

Topography around Narutochō-mitsuishi

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

Within 3 km, the terrain around Narutochō-mitsuishi has only modest variations in elevation — a maximum elevation change of 183 m around an average of 18 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 539 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,940 m.

The land around Narutochō-mitsuishi is covered by water (38%), trees (31%) and artificial surfaces (26%) within 3 km, water (59%) and trees (22%) within 16 km, and water (47%) and trees (41%) within 80 km.

3 km
183 m
16 km
539 m
80 km
1,940 m
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Takabō 11 km · Fukura 12 km · Yakami 12 km · Tokushima 15 km · Minamiawaji 17 km · Ishii 21 km · Komatsushimachō 22 km · Higashikagawa 25 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 Narutochō-mitsuishi (34.1993°, 134.6093°, 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. 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).