Kikuchi weather in September

In September, Kikuchi sees average daytime highs of 28°C and overnight lows near 20°C, with 156 mm of rain across 11.3 wet days and about 12.2 hours of daylight. It is the 3rd-warmest and 5th-wettest month of the year here.

Highs ease over the month, from about 29°C in the first days to 26°C by the end. The sky is clear or mostly clear about 35% 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 Kikuchi's 4th-clearest and 8th-windiest month. For the whole year in context, see Kikuchi's year-round climate.

Daytime high
28°
3rd warmest
Overnight low
20°
10th coldest
Rainfall
156 mm
11.3 wet days
Daylight
12 h 12 min
6:05 AM – 6:17 PM
Cloud cover
59%
4th clearest
Wind
7 km/h
8th windiest
Solar energy
4.03 kWh/m²
Travel score
5.9
out of 10

Kikuchi is city in Kumamoto Prefecture, Japan.

Density
179/km²
people per km²
Founded
2005

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 29°C in the first days to 26°C by the end.

A typical September day in Kikuchi reaches about 28°C in the afternoon and slips back to 20°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 25°C and 31°C. Set against its neighbours, September runs about 3°C cooler than August and about 5°C warmer than October.

10°15°20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
13022
23022
32922
42922
52922
62922
72922
82921
92921
102921
112921
122921
132821
142820
152820
162820
172820
182820
192819
202719
212719
222719
232719
242719
252718
262618
272618
282618
292618
302617

How September really feels in Kikuchi

Once humidity and wind are folded in, September averages 1 day 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
1
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

The story in September is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Kikuchi weather by month

How September compares with the rest of the year at a glance. September is the 3rd-warmest and 5th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / 648.21.110.12.0
Feb11° / 889.3110.82.6
Mar15° / 13612.30.211.74.1
Apr19° / 10°15511.4012.85.8
May24° / 15°18111.5013.76.5
Jun26° / 19°42017014.15.3
Jul29° / 23°34317.80144.3
Aug31° / 24°15814.2013.24.2
Sep28° / 20°15611.3012.25.9
Oct23° / 14°967.5011.27.3
Nov17° / 847.9010.35.8
Dec12° / 697.90.49.93.2

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 35% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 16% of September, with mostly cloudy or overcast conditions the remaining 49%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14753
24852
34852
44852
54852
64951
74951
84951
95050
105050
115149
125149
135149
145149
155149
165149
175149
185149
195149
205149
215149
225149
235149
245149
255248
265248
275347
285347
295347
305347

Chance of precipitation in September

Any precipitation

Kikuchi gets around 156 mm of rain over 11.3 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 37% and peaks near 45% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
145
244
343
443
542
642
741
840
940
1039
1139
1238
1337
1437
1536
1636
1735
1835
1935
2034
2134
2234
2334
2433
2533
2633
2732
2832
2932
3031

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 29% of days. Sticky, muggy-or-worse air turns up on roughly 59% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1011129563
2011230543
3021331513
4021431512
5021532482
6031633462
7041733442
8151833421
9161833411
10171933391
11282033371
12292132351
133102132331
143112231311
154132331291
165142330271
176152429251
187162428241
197182527221
208192527200
219202626190
2210212625170
2311222624160
2412232724140
2513242723130
2614252722120
2715262622110
2816272621100
291827262090
301928261980

Wind in September

Winds average 7 km/h in September.

Across September, daily wind ranges from about 7 km/h on the calmest days to 8 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
17calm
27calm
37calm
47calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
248calm
258calm
268calm
278calm
288calm
298calm
308calm

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 5:55 AM to 6:15 AM, and sunset from 6:38 PM to 5:57 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.75:556:38
212.75:566:37
312.65:566:35
412.65:576:34
512.65:586:32
612.55:586:31
712.55:596:30
812.56:006:28
912.46:006:27
1012.46:016:26
1112.46:026:24
1212.36:026:23
1312.36:036:21
1412.36:046:20
1512.26:046:18
1612.26:056:17
1712.26:066:16
1812.16:066:14
1912.16:076:13
2012.16:086:11
2112.06:086:10
2212.06:096:09
2312.06:106:07
2411.96:106:06
2511.96:116:04
2611.96:126:03
2711.86:136:02
2811.86:136:00
2911.76:145:59
3011.76:155:57

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.03 kWh/m².

For context, solar energy here swings from a low near 2.27 kWh/m² to a high of 5.18 kWh/m² in May across the year — September's 4.03 kWh/m² falls in the middle.

012345151015202530
Solar energy (kWh/m²)Level
14.4Bright
24.3Bright
34.3Bright
44.3Bright
54.3Bright
64.2Bright
74.2Bright
84.2Bright
94.2Bright
104.2Bright
114.2Bright
124.1Bright
134.1Bright
144.1Bright
154.1Bright
164.1Bright
174.0Bright
184.0Bright
194.0Bright
204.0Moderate
214.0Moderate
223.9Moderate
233.9Moderate
243.9Moderate
253.9Moderate
263.9Moderate
273.9Moderate
283.8Moderate
293.8Moderate
303.8Moderate
Planning a trip in September

Hazard calendar for Kikuchi

In seasonPeak

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

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

Kikuchi's rainy season runs June–July, 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 Kikuchi?

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

5.9
Sightseeing
3rd-best month of the year
6.6
Beach & pool
1st-best month of the year

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

What to pack for Kikuchi in September

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

In September, Kikuchi sees daytime highs around 28°C and nights near 20°C. Pack light clothes. Worth having: rain gear. About 11 days see rain.

light clothesrain gear

Sea temperature near Kikuchi 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 at the nearest coast (about 22 km away) is warmest in August at about 27°C and coldest in February near 13°C.

It's comfortable for a long swim from May 27 to Nov 13 — about 5.6 months when the water holds above 20°C.

10°15°20°25°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan14Bracing
Feb13Bracing
Mar14Bracing
Apr16Cool
May19Cool
Jun22Refreshing
Jul25Warm
Aug27Warm
Sep26Warm
Oct23Refreshing
Nov20Cool
Dec17Cool

UV index in Kikuchi in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 10 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Kikuchi peaks around June 22 at about 10 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 21 at about 3 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highExtremeVery highModerateJun 22UV 10Dec 21UV 3
UV index (midday)Level
Jan3Moderate
Feb5Moderate
Mar6High
Apr8Very high
May8Very high
Jun10Extreme
Jul10Extreme
Aug9Very high
Sep10Very high
Oct7High
Nov4Moderate
Dec3Moderate

Air quality in Kikuchi 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 Kikuchi is worst in March — around 25 µg/m³ PM2.5 (moderate), about 1.9× the cleanest month (July, 13 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateMar 2325 µg/m³Jul 2114 µg/m³
PM2.5 (µg/m³)Level
Jan18Moderate
Feb20Moderate
Mar25Moderate
Apr25Moderate
May23Moderate
Jun19Moderate
Jul13Moderate
Aug15Moderate
Sep14Moderate
Oct14Moderate
Nov16Moderate
Dec15Moderate
Location & terrain

Where is Kikuchi?

Kikuchi sits at 33.0°N, 130.8°E, 73 m above sea level, in Japan. The nearest listed city is Kōshi, 11 km away.

Topography around Kikuchi

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

Within 3 km, the terrain around Kikuchi has only modest variations in elevation — a maximum elevation change of 213 m around an average of 103 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 1,158 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,765 m.

The land around Kikuchi is covered by trees (48%) and cropland (30%) within 3 km, trees (62%) and cropland (21%) within 16 km, and trees (68%) within 80 km.

3 km
213 m
16 km
1,158 m
80 km
1,765 m
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Kōshi 11 km · Yamaga 12 km · Ōzu 13 km · Okino 13 km · Uekimachi-mōno 15 km · Kumamoto 23 km · Tamana 23 km · Kotō 24 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 Kikuchi (32.9833°, 130.8167°, elevation 73 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).