Miyoshi weather in September

In September, Miyoshi sees average daytime highs of 26°C and overnight lows near 18°C, with 194 mm of rain across 12.7 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 24°C by the end. The sky is clear or mostly clear about 23% 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 Miyoshi's 8th-clearest and 9th-windiest month. For the whole year in context, see Miyoshi's year-round climate.

Daytime high
26°
3rd warmest
Overnight low
18°
10th coldest
Rainfall
194 mm
12.7 wet days
Daylight
12 h 12 min
5:56 AM – 6:09 PM
Cloud cover
65%
8th clearest
Wind
8 km/h
9th windiest
Solar energy
4.05 kWh/m²
Travel score
6.0
out of 10

Miyoshi is city in Hiroshima Prefecture, Japan.

Density
69/km²
people per km²
Founded
2004

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 24°C by the end.

A typical September day in Miyoshi reaches about 26°C in the afternoon and slips back to 18°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 23°C and 30°C. Set against its neighbours, September runs about 4°C cooler than August and about 5°C warmer than October.

10°15°20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
12920
22920
32920
42820
52820
62820
72819
82819
92819
102719
112719
122719
132718
142718
152718
162618
172618
182617
192617
202617
212517
222516
232516
242516
252516
262516
272415
282415
292415
302415

How September really feels in Miyoshi

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.

Miyoshi 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 / -1°6311.46.89.90.8
Feb / -0°67115.810.71.3
Mar12° / 10812.32.311.73.1
Apr18° / 11610.60.112.85.6
May22° / 12°13610.3013.86.6
Jun25° / 17°20514.5014.35.7
Jul29° / 21°24716014.14.6
Aug30° / 22°15314.2013.34.3
Sep26° / 18°19412.7012.26.0
Oct21° / 11°1058.4011.16.7
Nov15° / 718.60.210.24.7
Dec / 6911.249.71.9

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 23% 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 58%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
13961
24060
34060
44159
54060
64060
74060
84060
94159
104159
114159
124258
134357
144258
154258
164258
174159
184258
194258
204258
214258
224258
234357
244357
254357
264456
274456
284456
294456
304456

Chance of precipitation in September

Any precipitation

Miyoshi gets around 194 mm of rain over 12.7 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 41% and peaks near 46% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
146
246
345
445
545
645
745
845
945
1044
1144
1244
1343
1443
1542
1642
1741
1841
1941
2040
2140
2240
2339
2438
2538
2637
2736
2835
2935
3034

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 28% of days. Sticky, muggy-or-worse air turns up on roughly 42% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
106224131
207234030
308244028
418254027
519253925
6110263924
7111263823
8212273821
9313273720
10314283619
11416283517
12517283416
13718283315
14819283214
15920283012
161121282911
171222272810
18142327269
19162427259
20172527238
21192627227
22212726206
23222726196
24242826175
25252925165
26273025154
27283024144
28303124133
29313123123
30333222112

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.

0246810151015202530
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 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 5:45 AM to 6:07 AM, and sunset from 6:31 PM to 5:49 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.85:456:31
212.75:466:30
312.75:476:28
412.75:486:27
512.65:486:26
612.65:496:24
712.55:506:23
812.55:516:21
912.55:516:20
1012.45:526:18
1112.45:536:17
1212.45:546:15
1312.35:546:14
1412.35:556:12
1512.35:566:11
1612.25:566:09
1712.25:576:08
1812.15:586:06
1912.15:596:05
2012.15:596:03
2112.06:006:02
2212.06:016:00
2312.06:025:59
2411.96:035:57
2511.96:035:56
2611.86:045:55
2711.86:055:53
2811.86:065:52
2911.76:065:50
3011.76:075:49

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.05 kWh/m².

For context, solar energy here swings from a low near 2.14 kWh/m² to a high of 5.53 kWh/m² in May across the year — September's 4.05 kWh/m² falls in the middle.

012345151015202530
Solar energy (kWh/m²)Level
14.5Bright
24.4Bright
34.4Bright
44.4Bright
54.3Bright
64.3Bright
74.3Bright
84.2Bright
94.2Bright
104.2Bright
114.2Bright
124.2Bright
134.1Bright
144.1Bright
154.1Bright
164.1Bright
174.0Bright
184.0Bright
194.0Bright
204.0Moderate
214.0Moderate
223.9Moderate
233.9Moderate
243.9Moderate
253.9Moderate
263.9Moderate
273.8Moderate
283.8Moderate
293.8Moderate
303.8Moderate
Planning a trip in September

Hazard calendar for Miyoshi

In seasonPeak

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

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

Miyoshi'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 Miyoshi?

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

6.0
Sightseeing
3rd-best month of the year
6.0
Beach & pool
2nd-best month of the year

September is a reasonable time to visit Miyoshi for sightseeing.

What to pack for Miyoshi in September

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

In September, Miyoshi sees daytime highs around 26°C and nights near 18°C. Worth packing: light clothes and rain gear. About 13 days see rain.

light clothesrain gear

Sea temperature near Miyoshi 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 at the nearest coast (about 56 km away) is warmest in August at about 27°C and coldest in February near 13°C.

It's comfortable for a long swim from Jun 10 to Nov 17 — about 5.3 months when the water holds above 20°C.

10°15°20°25°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan15Bracing
Feb13Bracing
Mar13Bracing
Apr15Bracing
May17Cool
Jun21Refreshing
Jul24Warm
Aug27Warm
Sep26Warm
Oct23Refreshing
Nov20Refreshing
Dec17Cool

UV index in Miyoshi 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 Miyoshi peaks around July 16 at about 11 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 23 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 highExtremeVery highModerateJul 16UV 11Dec 23UV 3
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar5High
Apr7Very high
May9Very high
Jun10Very high
Jul11Extreme
Aug10Very high
Sep9Very high
Oct6High
Nov4Moderate
Dec3Moderate

Air quality in Miyoshi 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 Miyoshi is worst in April — around 22 µg/m³ PM2.5 (moderate), about 2.1× the cleanest month (October, 11 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodApr 1322 µg/m³Oct 1711 µg/m³
PM2.5 (µg/m³)Level
Jan14Moderate
Feb17Moderate
Mar21Moderate
Apr22Moderate
May20Moderate
Jun18Moderate
Jul14Moderate
Aug14Moderate
Sep12Good
Oct11Good
Nov12Good
Dec11Good
Location & terrain

Where is Miyoshi?

Miyoshi sits at 34.8°N, 132.8°E, 154 m above sea level, in Japan. The nearest listed city is Shōbara, 16 km away.

Topography around Miyoshi

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

Within 3 km, the terrain around Miyoshi has significant variations in elevation — a maximum elevation change of 352 m around an average of 226 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 734 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,330 m.

The land around Miyoshi is covered by trees (61%) and artificial surfaces (23%) within 3 km, trees (85%) within 16 km, and trees (73%) and water (20%) within 80 km.

3 km
352 m
16 km
734 m
80 km
1,330 m
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Shōbara 16 km · Aki-takata 21 km · Kōzan 30 km · Yae 32 km · Fuchūchō 43 km · Higashihiroshima 45 km · Shin’ichi 47 km · Mihara 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 Miyoshi (34.8°, 132.85°, elevation 154 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).