Kunisaki weather in September

In September, Kunisaki sees average daytime highs of 26°C and overnight lows near 23°C, with 178 mm of rain across 12 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 27°C in the first days to 24°C by the end. The sky is clear or mostly clear about 38% 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 Kunisaki's 5th-clearest and 8th-windiest month. For the whole year in context, see Kunisaki's year-round climate.

Daytime high
26°
3rd warmest
Overnight low
23°
10th coldest
Rainfall
178 mm
12 wet days
Daylight
12 h 12 min
6:01 AM – 6:14 PM
Cloud cover
57%
5th clearest
Wind
14 km/h
8th windiest
Solar energy
4.34 kWh/m²
Travel score
6.4
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 27°C in the first days to 24°C by the end.

A typical September day in Kunisaki reaches about 26°C in the afternoon and slips back to 23°C overnight — a 3°C spread between the day's warmth and the night's chill. On most days the high lands between 24°C and 28°C. Set against its neighbours, September runs about 2°C cooler than August and about 4°C warmer than October.

15°20°25°30°151015202530
Avg high (°C)Avg low (°C)
12725
22725
32725
42725
52725
62724
72724
82724
92724
102624
112624
122624
132624
142624
152623
162623
172623
182523
192523
202523
212523
222522
232522
242522
252522
262422
272422
282422
292422
302421

How September really feels in Kunisaki

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.

Kunisaki 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 / 648.10.7102.1
Feb10° / 758.60.410.82.2
Mar12° / 12311011.73.3
Apr16° / 13°14310.6012.85.1
May20° / 17°16010.6013.76.2
Jun23° / 21°29214.6014.25.8
Jul27° / 24°21213.40145.8
Aug28° / 26°13511.8013.25.8
Sep26° / 23°17812012.26.4
Oct22° / 19°1428.3011.27.0
Nov17° / 14°818010.35.7
Dec12° / 688.40.29.83.4

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 38% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 13% of September, with mostly cloudy or overcast conditions the remaining 49%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14852
24852
34852
44951
54951
64951
74951
85050
94951
105050
115050
125050
135149
145149
155149
165149
175149
185149
195149
205149
215149
225248
235248
245347
255347
265347
275446
285446
295446
305545

Chance of precipitation in September

Any precipitation

Kunisaki gets around 178 mm of rain over 12 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 39% and peaks near 41% on the wettest days.

0%10%20%30%40%50%151015202530
Rain chance (%)
140
240
340
440
540
640
741
841
941
1041
1140
1240
1340
1439
1539
1639
1739
1839
1939
2039
2138
2238
2338
2438
2538
2637
2737
2837
2937
3037

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 36% of days. Sticky, muggy-or-worse air turns up on roughly 75% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1003194831
2003204828
3004214926
4004225024
5005235121
6016255019
7016264918
8017274916
9018284814
10029284713
110211294612
120312304511
131413304310
14141431419
15151631398
16161732377
17171832356
18281932345
19292032324
202102232304
213112332283
223122432273
233142531252
244152631232
254162630222
264172730211
275182829191
286192928181
296202928171
307213027160

Wind in September

Winds average 14 km/h in September.

Across September, daily wind ranges from about 13 km/h on the calmest days to 15 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202530
Wind speed (km/h)Feels
113light breeze
213light breeze
313light breeze
413light breeze
514light breeze
614light breeze
714light breeze
814light breeze
914light breeze
1014light breeze
1114light breeze
1214light breeze
1314light breeze
1414light breeze
1514light breeze
1614light breeze
1715light breeze
1815light breeze
1915light breeze
2015light breeze
2115light breeze
2215light breeze
2315light breeze
2415light breeze
2515light breeze
2615light breeze
2715light breeze
2815light breeze
2915light breeze
3015light 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 5:51 AM to 6:11 AM, and sunset from 6:35 PM to 5:54 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.75:516:35
212.75:526:33
312.75:526:32
412.65:536:31
512.65:546:29
612.65:546:28
712.55:556:26
812.55:566:25
912.55:566:24
1012.45:576:22
1112.45:586:21
1212.35:586:19
1312.35:596:18
1412.36:006:16
1512.26:016:15
1612.26:016:14
1712.26:026:12
1812.16:036:11
1912.16:036:09
2012.16:046:08
2112.06:056:06
2212.06:056:05
2312.06:066:03
2411.96:076:02
2511.96:086:01
2611.86:085:59
2711.86:095:58
2811.86:105:56
2911.76:105:55
3011.76:115:54

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.34 kWh/m².

For context, solar energy here swings from a low near 2.32 kWh/m² to a high of 5.56 kWh/m² in May across the year — September's 4.34 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
14.8Bright
24.8Bright
34.7Bright
44.7Bright
54.7Bright
64.7Bright
74.6Bright
84.6Bright
94.6Bright
104.5Bright
114.5Bright
124.5Bright
134.4Bright
144.4Bright
154.4Bright
164.4Bright
174.3Bright
184.3Bright
194.3Bright
204.3Bright
214.2Bright
224.2Bright
234.2Bright
244.2Bright
254.1Bright
264.1Bright
274.1Bright
284.0Bright
294.0Bright
304.0Bright
Planning a trip in September

Hazard calendar for Kunisaki

In seasonPeak

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

Kunisaki 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 Kunisaki?

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

6.4
Sightseeing
2nd-best month of the year
6.1
Beach & pool
2nd-best month of the year

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

What to pack for Kunisaki in September

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

In September, Kunisaki sees daytime highs around 26°C and nights near 23°C. Worth packing: light clothes and rain gear. About 12 days see rain.

light clothesrain gear

Sea temperature near Kunisaki 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 16 km away) is warmest in August at about 26°C and coldest in February near 14°C.

It's comfortable for a long swim from Jun 7 to Nov 18 — about 5.4 months when the water holds above 20°C.

10°15°20°25°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan15Bracing
Feb14Bracing
Mar14Bracing
Apr15Cool
May18Cool
Jun21Refreshing
Jul24Warm
Aug26Warm
Sep25Warm
Oct23Refreshing
Nov20Refreshing
Dec17Cool

UV index in Kunisaki 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 Kunisaki peaks around June 20 at about 10 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 20 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 20UV 10Dec 20UV 3
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar6High
Apr8Very high
May8Very high
Jun10Extreme
Jul10Very high
Aug9Very high
Sep9Very high
Oct6High
Nov4Moderate
Dec3Moderate

Air quality in Kunisaki 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 Kunisaki is worst in April — around 23 µg/m³ PM2.5 (moderate), about 2.0× the cleanest month (October, 11 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateModerateApr 1323 µg/m³Oct 1612 µg/m³
PM2.5 (µg/m³)Level
Jan15Moderate
Feb18Moderate
Mar23Moderate
Apr23Moderate
May22Moderate
Jun19Moderate
Jul17Moderate
Aug16Moderate
Sep13Moderate
Oct11Good
Nov13Moderate
Dec13Moderate
Location & terrain

Where is Kunisaki?

Kunisaki sits at 33.6°N, 131.7°E, 25 m above sea level, in Japan. The nearest listed city is Kitsuki, 18 km away.

Topography around Kunisaki

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

Within 3 km, the terrain around Kunisaki has only modest variations in elevation — a maximum elevation change of 186 m around an average of 34 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 705 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,799 m.

The land around Kunisaki is covered by trees (41%) and water (32%) within 3 km, water (56%) and trees (38%) within 16 km, and water (50%) and trees (43%) within 80 km.

3 km
186 m
16 km
705 m
80 km
1,799 m
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Kitsuki 18 km · Bungo-Takada-shi 26 km · Hiji 27 km · Tsurusaki 35 km · Yokkaichi 37 km · Beppu 37 km · Ōita 38 km · Usuki 48 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 Kunisaki (33.5547°, 131.728°, elevation 25 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).