Asakuchi weather in September

In September, Asakuchi sees average daytime highs of 28°C and overnight lows near 22°C, with 147 mm of rain across 10.1 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 30°C in the first days to 26°C by the end. The sky is clear or mostly clear about 31% 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 Asakuchi's 9th-clearest and 8th-windiest month. For the whole year in context, see Asakuchi's year-round climate.

Daytime high
28°
3rd warmest
Overnight low
22°
10th coldest
Rainfall
147 mm
10.1 wet days
Daylight
12 h 12 min
5:54 AM – 6:06 PM
Cloud cover
61%
9th clearest
Wind
10 km/h
8th windiest
Solar energy
4.12 kWh/m²
Travel score
5.8
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 30°C in the first days to 26°C by the end.

A typical September day in Asakuchi reaches about 28°C in the afternoon and slips back to 22°C overnight — a 6°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 4°C cooler than August and about 5°C warmer than October.

15°20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
13124
23024
33024
43024
53024
63024
73023
83023
92923
102923
112923
122923
132922
142922
152822
162822
172822
182821
192821
202721
212721
222721
232720
242720
252620
262620
272620
282619
292619
302619

How September really feels in Asakuchi

Once humidity and wind are folded in, September averages 5 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
5
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.

Asakuchi 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
Jan10° / 435.30.39.92.5
Feb11° / 546.80.510.72.7
Mar14° / 949.50.111.74.1
Apr19° / 11°11010012.86.0
May23° / 16°1289.9013.86.8
Jun26° / 20°17811.8014.36.0
Jul30° / 24°17712.1014.14.7
Aug32° / 25°999.6013.34.2
Sep28° / 22°14710.1012.25.8
Oct23° / 16°1117.4011.17.3
Nov17° / 10°566.1010.26.1
Dec12° / 485.509.73.7

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 31% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 17% of September, with mostly cloudy or overcast conditions the remaining 52%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14852
24852
34951
44951
54852
64852
74852
84852
94852
104852
114852
124951
134852
144852
154753
164753
174753
184753
194753
204753
214852
224753
234753
244852
254852
264852
274951
284951
295050
305050

Chance of precipitation in September

Any precipitation

Asakuchi gets around 147 mm of rain over 10.1 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 33% and peaks near 35% on the wettest days.

0%10%20%30%40%50%151015202530
Rain chance (%)
135
235
335
435
535
635
735
835
935
1035
1135
1234
1334
1433
1533
1632
1732
1832
1932
2032
2132
2232
2332
2432
2532
2632
2732
2832
2932
3031

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 27% of days. Sticky, muggy-or-worse air turns up on roughly 55% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1031328515
2041428495
3041429484
4151530464
5151630444
6161731423
7161732403
8171832383
9281932373
10292032352
113102032332
123112132312
134122231292
145132230272
156152329252
167162329242
177172428222
188182428201
199192527191
2010212526171
2111222625161
2212232624141
2313242723131
2414252722121
2514262821101
261527282091
271627281981
281728291970
291829291860
301929291760

Wind in September

Winds average 10 km/h in September.

Across September, daily wind ranges from about 9 km/h on the calmest days to 10 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
19calm
210calm
310calm
410calm
510calm
610calm
710calm
810calm
910calm
1010calm
1110calm
1210calm
1310calm
1410calm
1510calm
1610calm
1710calm
1810calm
1910calm
2010calm
2110calm
2210calm
2310calm
2410calm
2510calm
2610calm
2710calm
2810calm
2910calm
3010calm

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 5:43 AM to 6:04 AM, and sunset from 6:28 PM to 5:46 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.85:436:28
212.75:436:27
312.75:446:25
412.75:456:24
512.65:456:22
612.65:466:21
712.55:476:20
812.55:486:18
912.55:486:17
1012.45:496:15
1112.45:506:14
1212.45:516:12
1312.35:516:11
1412.35:526:09
1512.25:536:08
1612.25:546:06
1712.25:546:05
1812.15:556:03
1912.15:566:02
2012.15:566:00
2112.05:575:59
2212.05:585:57
2312.05:595:56
2411.95:595:54
2511.96:005:53
2611.86:015:52
2711.86:025:50
2811.86:035:49
2911.76:035:47
3011.76:045:46

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.12 kWh/m².

For context, solar energy here swings from a low near 2.32 kWh/m² to a high of 5.53 kWh/m² in May across the year — September's 4.12 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
14.6Bright
24.5Bright
34.5Bright
44.5Bright
54.5Bright
64.4Bright
74.4Bright
84.4Bright
94.3Bright
104.3Bright
114.3Bright
124.3Bright
134.2Bright
144.2Bright
154.2Bright
164.1Bright
174.1Bright
184.1Bright
194.1Bright
204.0Bright
214.0Bright
224.0Moderate
234.0Moderate
243.9Moderate
253.9Moderate
263.9Moderate
273.9Moderate
283.8Moderate
293.8Moderate
303.8Moderate
Planning a trip in September

Hazard calendar for Asakuchi

In seasonPeak

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

Asakuchi 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 Asakuchi?

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

5.8
Sightseeing
6th-best month of the year
6.7
Beach & pool
1st-best month of the year

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

What to pack for Asakuchi in September

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

In September, Asakuchi sees daytime highs around 28°C and nights near 22°C. Pack light clothes. Worth having: rain gear. About 10 days see rain.

light clothesrain gear

Sea temperature near Asakuchi in September

The nearest coast averages about 27°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 18 km away) is warmest in August at about 28°C and coldest in February near 13°C.

It's comfortable for a long swim from Jun 3 to Nov 12 — about 5.4 months when the water holds above 20°C.

10°15°20°25°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan14Bracing
Feb13Bracing
Mar13Bracing
Apr15Bracing
May18Cool
Jun22Refreshing
Jul25Warm
Aug28Warm
Sep27Warm
Oct23Refreshing
Nov20Cool
Dec16Cool

UV index in Asakuchi 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 Asakuchi peaks around July 12 at about 10 (very high) — 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 highModerateJul 12UV 10Dec 22UV 3
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar5High
Apr7Very high
May8Very high
Jun10Very high
Jul10Very high
Aug9Very high
Sep9Very high
Oct6High
Nov4Moderate
Dec3Moderate

Air quality in Asakuchi 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 Asakuchi is worst in April — around 24 µg/m³ PM2.5 (moderate), about 1.7× the cleanest month (December, 14 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateApr 1324 µg/m³Dec 1414 µg/m³
PM2.5 (µg/m³)Level
Jan16Moderate
Feb19Moderate
Mar23Moderate
Apr24Moderate
May22Moderate
Jun20Moderate
Jul17Moderate
Aug17Moderate
Sep16Moderate
Oct14Moderate
Nov15Moderate
Dec14Moderate
Location & terrain

Where is Asakuchi?

Asakuchi sits at 34.5°N, 133.6°E, 9 m above sea level, in Japan. The nearest listed city is Kamogatachō-kamogata, 1.0 km away.

Topography around Asakuchi

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

Within 3 km, the terrain around Asakuchi has significant variations in elevation — a maximum elevation change of 279 m around an average of 58 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 505 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,811 m.

The land around Asakuchi is covered by trees (56%) and artificial surfaces (29%) within 3 km, trees (42%), water (28%) and artificial surfaces (20%) within 16 km, and trees (64%) and water (24%) within 80 km.

3 km
279 m
16 km
505 m
80 km
1,811 m
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Kamogatachō-kamogata 1.0 km · Kasaoka 10 km · Ibara 14 km · Kurashiki 16 km · Kannabechō-yahiro 17 km · Sōja 21 km · Fukuyama 22 km · Takahashi 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 Asakuchi (34.5348°, 133.603°, elevation 9 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).