Hitoyoshi weather in September

In September, Hitoyoshi sees average daytime highs of 27°C and overnight lows near 19°C, with 185 mm of rain across 14.4 wet days and about 12.2 hours of daylight. It is the 3rd-warmest and 4th-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 25% of the time in September, and the air most often feels muggy.

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 Hitoyoshi's 8th-clearest and 11th-windiest month. For the whole year in context, see Hitoyoshi's year-round climate.

Daytime high
27°
3rd warmest
Overnight low
19°
10th coldest
Rainfall
185 mm
14.4 wet days
Daylight
12 h 12 min
6:05 AM – 6:17 PM
Cloud cover
64%
8th clearest
Wind
7 km/h
11th windiest
Solar energy
4.06 kWh/m²
Travel score
5.7
out of 10

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 Hitoyoshi reaches about 27°C in the afternoon and slips back to 19°C overnight — a 8°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 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)
12921
22921
32821
42821
52821
62821
72821
82821
92820
102820
112820
122820
132720
142720
152720
162719
172719
182719
192719
202719
212618
222618
232618
242618
252618
262618
272617
282517
292517
302517

How September really feels in Hitoyoshi

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.

Hitoyoshi weather by month

How September compares with the rest of the year at a glance. September is the 3rd-warmest and 4th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / 819.72.310.11.7
Feb10° / 104101.610.82.3
Mar14° / 15213.50.411.83.8
Apr19° / 17812.3012.85.5
May23° / 14°20212.6013.66.2
Jun25° / 18°49719.6014.15.0
Jul28° / 22°36320.5013.94.2
Aug30° / 23°17918013.24.2
Sep27° / 19°18514.4012.25.7
Oct22° / 13°1109.2011.27.0
Nov17° / 1028.6010.35.6
Dec11° / 8590.99.92.9

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 25% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 18% of September, with mostly cloudy or overcast conditions the remaining 57%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
13961
24060
33961
43961
53961
63961
74060
83961
94060
104159
114159
124258
134357
144456
154456
164654
174654
184555
194654
204654
214654
224654
234654
244753
254654
264654
274654
284753
294753
304654

Chance of precipitation in September

Any precipitation

Hitoyoshi gets around 185 mm of rain over 14.4 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 48% and peaks near 57% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
157
257
356
456
555
654
754
853
952
1051
1151
1250
1349
1448
1547
1647
1746
1846
1945
2044
2144
2243
2343
2442
2542
2641
2741
2840
2940
3039

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 34% of days. Sticky, muggy-or-worse air turns up on roughly 61% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1011039501
2011139480
3011240460
4021241440
5121341430
6131442410
7131442390
8141542380
9251642360
10251641350
11371740330
12381839320
13491839300
145101938290
155112036270
166132035250
177142134240
188152133220
199162232210
2010182331190
2110192330180
2211202429160
2312212528150
2413222527130
2513232626120
2614242625110
2715242624100
281625272390
291726272380
301826272270

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 7 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
247calm
257calm
267calm
277calm
287calm
297calm
307calm

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 5:56 AM to 6:15 AM, and sunset from 6:38 PM to 5:58 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.75:566:38
212.75:576:36
312.65:576:35
412.65:586:34
512.65:586:32
612.55:596:31
712.56:006:30
812.56:006:28
912.46:016:27
1012.46:026:25
1112.46:026:24
1212.36:036:23
1312.36:046:21
1412.36:046:20
1512.26:056:19
1612.26:056:17
1712.26:066:16
1812.16:076:14
1912.16:076:13
2012.16:086:12
2112.06:096:10
2212.06:096:09
2312.06:106:07
2411.96:116:06
2511.96:116:05
2611.96:126:03
2711.86:136:02
2811.86:136:01
2911.86:145:59
3011.76:155:58

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.06 kWh/m².

For context, solar energy here swings from a low near 2.45 kWh/m² to a high of 5.04 kWh/m² in May across the year — September's 4.06 kWh/m² falls in the middle.

012345151015202530
Solar energy (kWh/m²)Level
14.3Bright
24.3Bright
34.3Bright
44.3Bright
54.3Bright
64.2Bright
74.2Bright
84.2Bright
94.2Bright
104.2Bright
114.2Bright
124.2Bright
134.1Bright
144.1Bright
154.1Bright
164.1Bright
174.1Bright
184.1Bright
194.0Bright
204.0Bright
214.0Bright
224.0Bright
234.0Moderate
244.0Moderate
253.9Moderate
263.9Moderate
273.9Moderate
283.9Moderate
293.9Moderate
303.9Moderate
Planning a trip in September

Hazard calendar for Hitoyoshi

In seasonPeak

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

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

Hitoyoshi'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 Hitoyoshi?

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

5.7
Sightseeing
3rd-best month of the year
5.9
Beach & pool
1st-best month of the year

September is a reasonable time to visit Hitoyoshi for sightseeing.

What to pack for Hitoyoshi in September

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

In September, Hitoyoshi sees daytime highs around 27°C and nights near 19°C. Pack light clothes and rain gear. About 14 days see rain.

light clothesrain gear

Sea temperature near Hitoyoshi 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 37 km away) is warmest in August at about 28°C and coldest in February near 16°C.

It's comfortable for a long swim from May 16 to Dec 4 — about 6.7 months when the water holds above 20°C.

15°20°25°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan17Cool
Feb16Cool
Mar17Cool
Apr18Cool
May20Refreshing
Jun23Refreshing
Jul26Warm
Aug28Warm
Sep27Warm
Oct24Warm
Nov22Refreshing
Dec19Cool

UV index in Hitoyoshi 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 Hitoyoshi peaks around June 22 at about 11 (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 — every month of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highExtremeVery highHighModerateJun 22UV 11Dec 22UV 3
UV index (midday)Level
Jan3Moderate
Feb5Moderate
Mar7High
Apr8Very high
May8Very high
Jun11Extreme
Jul11Extreme
Aug9Very high
Sep10Very high
Oct7High
Nov5Moderate
Dec3Moderate

Air quality in Hitoyoshi 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 Hitoyoshi is worst in March — around 24 µg/m³ PM2.5 (moderate), about 1.8× the cleanest month (July, 13 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateMar 2424 µg/m³Jul 2114 µg/m³
PM2.5 (µg/m³)Level
Jan17Moderate
Feb20Moderate
Mar24Moderate
Apr24Moderate
May22Moderate
Jun18Moderate
Jul13Moderate
Aug14Moderate
Sep14Moderate
Oct14Moderate
Nov16Moderate
Dec15Moderate
Location & terrain

Where is Hitoyoshi?

Hitoyoshi sits at 32.2°N, 130.8°E, 130 m above sea level, in Japan. The nearest listed city is Ōkuchi-shinohara, 20 km away.

Topography around Hitoyoshi

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

Within 3 km, the terrain around Hitoyoshi has only modest variations in elevation — a maximum elevation change of 194 m around an average of 134 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 1,122 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,715 m.

The land around Hitoyoshi is covered by trees (48%) and artificial surfaces (26%) within 3 km, trees (87%) within 16 km, and trees (67%) and water (21%) within 80 km.

3 km
194 m
16 km
1,122 m
80 km
1,715 m
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Ōkuchi-shinohara 20 km · Ebino 21 km · Isa 21 km · Sashiki 25 km · Minamata 33 km · Kobayashi 34 km · Honmachi 35 km · Tsuruda 39 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 Hitoyoshi (32.2167°, 130.75°, elevation 130 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).