Hirado weather in September

In September, Hirado sees average daytime highs of 27°C and overnight lows near 23°C, with 183 mm of rain across 11.4 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 28°C in the first days to 25°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 Hirado's 3rd-clearest and 8th-windiest month. For the whole year in context, see Hirado's year-round climate.

Daytime high
27°
3rd warmest
Overnight low
23°
10th coldest
Rainfall
183 mm
11.4 wet days
Daylight
12 h 12 min
6:10 AM – 6:22 PM
Cloud cover
56%
3rd clearest
Wind
16 km/h
8th windiest
Solar energy
4.25 kWh/m²
Travel score
6.3
out of 10

Hirado is city in Nagasaki Prefecture, Japan.

Density
133/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 28°C in the first days to 25°C by the end.

A typical September day in Hirado reaches about 27°C in the afternoon and slips back to 23°C overnight — a 4°C spread between the day's warmth and the night's chill. On most days the high lands between 24°C and 29°C. Set against its neighbours, September runs about 3°C cooler than August and about 4°C warmer than October.

15°20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
12925
22824
32824
42824
52824
62824
72824
82824
92824
102824
112723
122723
132723
142723
152723
162723
172723
182722
192622
202622
212622
222622
232622
242622
252621
262521
272521
282521
292521
302521

How September really feels in Hirado

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.

Hirado 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° / 679.60.5102.3
Feb11° / 758.50.410.82.7
Mar14° / 12110.5011.74.0
Apr18° / 13°14210.3012.85.7
May22° / 17°1539.8013.76.5
Jun24° / 20°30214.6014.25.8
Jul28° / 24°27314.80145.2
Aug30° / 26°17113.6013.24.8
Sep27° / 23°18311.4012.26.3
Oct23° / 18°1047011.27.4
Nov18° / 13°948.2010.35.9
Dec13° / 738.309.83.5

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 14% of September, with mostly cloudy or overcast conditions the remaining 47%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14951
25050
35149
45149
55248
65248
75347
85347
95347
105347
115347
125446
135446
145446
155347
165347
175347
185248
195248
205248
215248
225248
235248
245347
255248
265248
275347
285446
295446
305545

Chance of precipitation in September

Any precipitation

Hirado gets around 183 mm of rain over 11.4 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 37% and peaks near 44% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%40%50%151015202530
Rain chance (%)
144
244
343
442
542
641
741
841
940
1040
1140
1239
1339
1438
1538
1637
1737
1836
1936
2036
2135
2235
2334
2433
2533
2632
2731
2830
2930
3029

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 32% of days. Sticky, muggy-or-worse air turns up on roughly 69% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1005224726
2006234724
3006254722
4017264620
5018264618
6019274617
70110284516
80211294414
90212294313
100313304212
110414304111
121415303910
13151730389
14161830369
15171930348
16282030327
17292130317
183102230296
193112330276
204122429265
214132529244
225142629224
235152728214
246162828203
256172827183
267192926172
278202926162
289212925151
2910222924141
3011232923131

Wind in September

Winds average 16 km/h in September.

Across September, daily wind ranges from about 15 km/h on the calmest days to 17 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202530
Wind speed (km/h)Feels
115light breeze
216light breeze
316light breeze
416light breeze
516light breeze
616light breeze
716light breeze
816light breeze
916light breeze
1016light breeze
1116light breeze
1216light breeze
1316light breeze
1416light breeze
1516light breeze
1616light breeze
1717light breeze
1817light breeze
1917light breeze
2017light breeze
2117light breeze
2217light breeze
2317light breeze
2417light breeze
2517light breeze
2617light breeze
2717light breeze
2817light breeze
2917light breeze
3017light 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 6:00 AM to 6:20 AM, and sunset from 6:43 PM to 6:02 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.76:006:43
212.76:006:42
312.76:016:41
412.66:026:39
512.66:026:38
612.66:036:36
712.56:046:35
812.56:056:34
912.46:056:32
1012.46:066:31
1112.46:076:29
1212.36:076:28
1312.36:086:27
1412.36:096:25
1512.26:096:24
1612.26:106:22
1712.26:116:21
1812.16:116:19
1912.16:126:18
2012.16:136:16
2112.06:136:15
2212.06:146:14
2312.06:156:12
2411.96:166:11
2511.96:166:09
2611.86:176:08
2711.86:186:07
2811.86:186:05
2911.76:196:04
3011.76:206:02

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.25 kWh/m².

For context, solar energy here swings from a low near 2.12 kWh/m² to a high of 5.46 kWh/m² in May across the year — September's 4.25 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
14.6Bright
24.5Bright
34.5Bright
44.5Bright
54.5Bright
64.5Bright
74.5Bright
84.4Bright
94.4Bright
104.4Bright
114.4Bright
124.3Bright
134.3Bright
144.3Bright
154.3Bright
164.3Bright
174.2Bright
184.2Bright
194.2Bright
204.2Bright
214.2Bright
224.1Bright
234.1Bright
244.1Bright
254.1Bright
264.1Bright
274.0Bright
284.0Bright
294.0Bright
304.0Moderate
Planning a trip in September

Hazard calendar for Hirado

In seasonPeak

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

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

Hirado's rainy season runs April–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 Hirado?

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

6.3
Sightseeing
3rd-best month of the year
6.4
Beach & pool
1st-best month of the year

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

What to pack for Hirado in September

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

In September, Hirado sees daytime highs around 27°C and nights near 23°C. Worth packing: light clothes and rain gear. About 11 days see rain.

light clothesrain gear

Sea temperature near Hirado 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 15°C.

It's comfortable for a long swim from Jun 4 to Nov 24 — about 5.7 months when the water holds above 20°C.

15°20°25°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan16Cool
Feb15Bracing
Mar15Bracing
Apr16Cool
May18Cool
Jun21Refreshing
Jul25Warm
Aug27Warm
Sep26Warm
Oct23Refreshing
Nov21Refreshing
Dec18Cool

UV index in Hirado 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 Hirado peaks around July 18 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 11 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highModerateJul 18UV 10Dec 21UV 3
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar6High
Apr7Very high
May8Very high
Jun9Very high
Jul10Very high
Aug9Very high
Sep9Very high
Oct6High
Nov4Moderate
Dec3Moderate

Air quality in Hirado 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 Hirado is worst in April — around 24 µg/m³ PM2.5 (moderate), about 2.1× the cleanest month (October, 11 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateModerateGoodModerateApr 1324 µg/m³Oct 1212 µg/m³
PM2.5 (µg/m³)Level
Jan16Moderate
Feb19Moderate
Mar23Moderate
Apr24Moderate
May21Moderate
Jun17Moderate
Jul12Good
Aug12Moderate
Sep12Good
Oct11Good
Nov14Moderate
Dec13Moderate
Location & terrain

Where is Hirado?

Hirado sits at 33.4°N, 129.6°E, 5 m above sea level, in Japan. The nearest listed city is Matsuura, 14 km away.

Topography around Hirado

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

Within 3 km, the terrain around Hirado has only modest variations in elevation — a maximum elevation change of 243 m around an average of 33 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 542 m; within 80 km, large variations in elevation — a maximum elevation change of 1,046 m.

The land around Hirado is covered by water (46%) and trees (43%) within 3 km, water (62%) and trees (33%) within 16 km, and water (73%) and trees (21%) within 80 km.

3 km
243 m
16 km
542 m
80 km
1,046 m
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Matsuura 14 km · Sasebo 27 km · Imarichō-kō 32 km · Arita 38 km · Karatsu 40 km · Saikai 44 km · Takeo 48 km · Iki 49 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 Hirado (33.3685°, 129.5525°, elevation 5 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).