Buzen weather in September

In September, Buzen sees average daytime highs of 27°C and overnight lows near 21°C, with 167 mm of rain across 13.1 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 29°C in the first days to 25°C by the end. The sky is clear or mostly clear about 31% 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 Buzen's 5th-clearest and 9th-windiest month. For the whole year in context, see Buzen's year-round climate.

Daytime high
27°
3rd warmest
Overnight low
21°
10th coldest
Rainfall
167 mm
13.1 wet days
Daylight
12 h 12 min
6:04 AM – 6:16 PM
Cloud cover
62%
5th clearest
Wind
8 km/h
9th windiest
Solar energy
3.99 kWh/m²
Travel score
5.9
out of 10

Buzen is city in Fukuoka Prefecture, Japan.

Density
242/km²
people per km²
Founded
1955

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 25°C by the end.

A typical September day in Buzen reaches about 27°C in the afternoon and slips back to 21°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 24°C and 30°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)
12923
22923
32923
42923
52923
62823
72823
82823
92822
102822
112822
122722
132722
142722
152722
162721
172721
182621
192621
202621
212620
222620
232620
242520
252520
262520
272519
282519
292519
302419

How September really feels in Buzen

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.

Buzen 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 / 618.42101.6
Feb / 7091.910.82.0
Mar13° / 11211.50.611.73.5
Apr18° / 11°12510.7012.85.7
May23° / 16°14311013.76.5
Jun26° / 20°28215.4014.25.6
Jul30° / 24°22116.10144.3
Aug30° / 25°14414.5013.24.3
Sep27° / 21°16713.1012.25.9
Oct22° / 16°1118.1011.27.0
Nov16° / 10°758.1010.35.4
Dec11° / 618.50.79.82.8

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 16% of September, with mostly cloudy or overcast conditions the remaining 54%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14357
24357
34456
44456
54456
64555
74555
84555
94654
104555
114654
124654
134753
144654
154753
164753
174654
184654
194654
204753
214753
224753
234852
244753
254753
264852
274852
284852
294852
305050

Chance of precipitation in September

Any precipitation

Buzen gets around 167 mm of rain over 13.1 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 43% and peaks near 51% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
151
250
350
450
550
650
749
849
948
1048
1147
1246
1345
1444
1543
1642
1741
1840
1939
2039
2138
2237
2337
2436
2536
2635
2735
2835
2934
3034

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 34% of days. Sticky, muggy-or-worse air turns up on roughly 66% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
101725625
201827604
301928584
4011029573
5011130553
6021231523
7021332503
8031433492
9031533462
10041634442
11151734422
12161835401
13171835381
14181934361
15292134331
162112234311
172122333291
183132432271
193142532261
204152532240
214162631220
224172731200
235182830190
246192929170
256202929150
267213028140
278223028130
289233027110
2910243026100
301125302590

Wind in September

Winds average 8 km/h in September.

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

051015151015202530
Wind speed (km/h)Feels
18calm
28calm
38calm
48calm
58calm
68calm
78calm
88calm
98calm
108calm
118calm
128calm
138calm
148calm
158calm
168calm
178calm
188calm
198calm
208calm
218calm
228calm
238calm
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 5:53 AM to 6:14 AM, and sunset from 6:37 PM to 5:56 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.75:536:37
212.75:546:36
312.75:556:34
412.65:556:33
512.65:566:32
612.65:576:30
712.55:576:29
812.55:586:27
912.55:596:26
1012.45:596:25
1112.46:006:23
1212.36:016:22
1312.36:026:20
1412.36:026:19
1512.26:036:17
1612.26:046:16
1712.26:046:15
1812.16:056:13
1912.16:066:12
2012.16:066:10
2112.06:076:09
2212.06:086:07
2312.06:096:06
2411.96:096:04
2511.96:106:03
2611.86:116:02
2711.86:116:00
2811.86:125:59
2911.76:135:57
3011.76:145:56

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 3.99 kWh/m².

For context, solar energy here swings from a low near 2.25 kWh/m² to a high of 5.34 kWh/m² in May across the year — September's 3.99 kWh/m² falls in the middle.

012345151015202530
Solar energy (kWh/m²)Level
14.4Bright
24.4Bright
34.3Bright
44.3Bright
54.3Bright
64.3Bright
74.2Bright
84.2Bright
94.2Bright
104.2Bright
114.1Bright
124.1Bright
134.1Bright
144.0Bright
154.0Bright
164.0Bright
174.0Moderate
184.0Moderate
193.9Moderate
203.9Moderate
213.9Moderate
223.9Moderate
233.9Moderate
243.8Moderate
253.8Moderate
263.8Moderate
273.8Moderate
283.8Moderate
293.7Moderate
303.7Moderate
Planning a trip in September

Hazard calendar for Buzen

In seasonPeak

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

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

Buzen's rainy season runs May–September, 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 Buzen?

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
6.1
Beach & pool
1st-best month of the year

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

What to pack for Buzen in September

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

In September, Buzen sees daytime highs around 27°C and nights near 21°C. Worth packing: light clothes and rain gear. About 13 days see rain.

light clothesrain gear

Sea temperature near Buzen 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 12°C.

It's comfortable for a long swim from Jun 6 to Nov 9 — about 5.2 months when the water holds above 20°C.

10°20°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan13Bracing
Feb12Bracing
Mar12Bracing
Apr14Bracing
May18Cool
Jun21Refreshing
Jul25Warm
Aug27Warm
Sep26Warm
Oct23Refreshing
Nov19Cool
Dec16Cool

UV index in Buzen 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 Buzen peaks around June 21 at about 10 (very high) — 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 — in 10 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highModerateJun 21UV 10Dec 21UV 3
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar6High
Apr8Very high
May8Very high
Jun10Very high
Jul10Very high
Aug9Very high
Sep9Very high
Oct6High
Nov4Moderate
Dec3Moderate

Air quality in Buzen 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 Buzen is worst in March — around 27 µg/m³ PM2.5 (moderate), about 2.2× the cleanest month (October, 12 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateMar 2026 µg/m³Oct 1212 µg/m³
PM2.5 (µg/m³)Level
Jan17Moderate
Feb20Moderate
Mar27Moderate
Apr24Moderate
May21Moderate
Jun18Moderate
Jul16Moderate
Aug19Moderate
Sep13Moderate
Oct12Good
Nov14Moderate
Dec13Moderate
Location & terrain

Where is Buzen?

Buzen sits at 33.6°N, 131.1°E, 20 m above sea level, in Japan. The nearest listed city is Nakatsu, 6.0 km away.

Topography around Buzen

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

Within 3 km, the terrain around Buzen has only modest variations in elevation — a maximum elevation change of 116 m around an average of 18 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 1,072 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,799 m.

The land around Buzen is covered by artificial surfaces (30%), cropland (29%) and water (26%) within 3 km, trees (40%) and water (39%) within 16 km, and trees (50%) and water (34%) within 80 km.

3 km
116 m
16 km
1,072 m
80 km
1,799 m
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Nakatsu 6.0 km · Tsuiki 11 km · Yukuhashi 19 km · Yokkaichi 20 km · Miyako 22 km · Kanda 23 km · Kawasaki 29 km · Bungo-Takada-shi 30 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 Buzen (33.6115°, 131.13°, elevation 20 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).