Mishōhirajō weather in September

In September, Mishōhirajō sees average daytime highs of 26°C and overnight lows near 23°C, with 204 mm of rain across 13.4 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 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 Mishōhirajō's 8th-clearest and 9th-windiest month. For the whole year in context, see Mishōhirajō's year-round climate.

Daytime high
26°
3rd warmest
Overnight low
23°
10th coldest
Rainfall
204 mm
13.4 wet days
Daylight
12 h 12 min
5:58 AM – 6:10 PM
Cloud cover
56%
8th clearest
Wind
16 km/h
9th windiest
Solar energy
4.33 kWh/m²
Travel score
6.3
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 Mishōhirajō 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 27°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)
12724
22724
32724
42724
52724
62724
72724
82624
92624
102624
112623
122623
132623
142623
152623
162623
172623
182523
192522
202522
212522
222522
232522
242522
252522
262422
272421
282421
292421
302421

Mishōhirajō 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° / 8711.70.810.12.3
Feb11° / 9310.80.410.82.6
Mar14° / 10°13512.4011.73.8
Apr17° / 13°14610.7012.85.4
May20° / 17°17210.7013.76.2
Jun23° / 21°30614.9014.15.7
Jul26° / 24°21012.20146.2
Aug27° / 25°14112.1013.26.2
Sep26° / 23°20413.4012.26.3
Oct22° / 19°1649.7011.26.9
Nov17° / 14°1039.2010.35.8
Dec13° / 10010.40.29.93.6

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 49%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15050
25050
35050
45050
55050
64951
75050
84951
94951
105050
115050
125149
135149
145149
155149
165149
175149
185149
195248
205248
215248
225347
235347
245347
255347
265347
275446
285446
295446
305446

Chance of precipitation in September

Any precipitation

Mishōhirajō gets around 204 mm of rain over 13.4 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 44% and peaks near 47% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
147
247
347
447
547
647
747
847
947
1047
1146
1246
1345
1444
1543
1643
1742
1842
1942
2042
2141
2241
2341
2441
2541
2641
2741
2841
2941
3041

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 39% of days. Sticky, muggy-or-worse air turns up on roughly 78% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1002165131
2002175229
3003185227
4003205225
5003215323
6004225321
7004235320
8015255118
9016265116
10017275015
11018284914
12129294812
131210304611
141312304410
15131331429
16141532418
17151632397
18151832376
19261933355
20272033334
21282233324
22292333303
23392433283
243102532272
253112632252
263122732232
273132832222
284142932211
294152931191
304163031181

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
1517light breeze
1617light 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 5:48 AM to 6:08 AM, and sunset from 6:31 PM to 5:50 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.75:486:31
212.75:496:30
312.65:496:28
412.65:506:27
512.65:516:25
612.55:516:24
712.55:526:23
812.55:536:21
912.45:536:20
1012.45:546:19
1112.45:556:17
1212.35:556:16
1312.35:566:14
1412.35:576:13
1512.25:576:11
1612.25:586:10
1712.25:596:09
1812.15:596:07
1912.16:006:06
2012.16:016:04
2112.06:016:03
2212.06:026:02
2312.06:036:00
2411.96:035:59
2511.96:045:57
2611.96:055:56
2711.86:065:55
2811.86:065:53
2911.76:075:52
3011.76:085:50

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.33 kWh/m².

For context, solar energy here swings from a low near 2.54 kWh/m² to a high of 5.47 kWh/m² in May across the year — September's 4.33 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
164.3Bright
174.3Bright
184.3Bright
194.3Bright
204.2Bright
214.2Bright
224.2Bright
234.2Bright
244.1Bright
254.1Bright
264.1Bright
274.0Bright
284.0Bright
294.0Moderate
304.0Moderate
Planning a trip in September

Hazard calendar for Mishōhirajō

In seasonPeak

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

Mishōhirajō 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 Mishōhirajō?

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

6.3
Sightseeing
2nd-best month of the year
5.9
Beach & pool
3rd-best month of the year

September is a reasonable time to visit Mishōhirajō for sightseeing.

What to pack for Mishōhirajō in September

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

In September, Mishōhirajō sees daytime highs around 26°C and nights near 23°C. Worth packing: light clothes and rain gear. About 13 days see rain.

light clothesrain gear

Sea temperature near Mishōhirajō 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 offshore is warmest in August at about 28°C and coldest in February near 18°C.

It's comfortable for a long swim from May 1 to Dec 23 — about 7.8 months when the water holds above 20°C.

15°20°25°30°JanFebMarAprMayJunJulAugSepOctNovDeccoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan19Cool
Feb18Cool
Mar18Cool
Apr19Cool
May21Refreshing
Jun23Refreshing
Jul26Warm
Aug28Warm
Sep27Warm
Oct25Warm
Nov23Refreshing
Dec20Refreshing

UV index in Mishōhirajō 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 Mishōhirajō peaks around June 23 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 highModerateJun 23UV 11Dec 22UV 3
UV index (midday)Level
Jan3Moderate
Feb5Moderate
Mar6High
Apr7Very high
May8Very high
Jun11Extreme
Jul11Extreme
Aug9Very high
Sep10Very high
Oct6High
Nov4Moderate
Dec3Moderate

Air quality in Mishōhirajō 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 Mishōhirajō is worst in April — around 20 µg/m³ PM2.5 (moderate), about 2.1× the cleanest month (October, 10 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodApr 1420 µg/m³Oct 1410 µg/m³
PM2.5 (µg/m³)Level
Jan13Moderate
Feb15Moderate
Mar19Moderate
Apr20Moderate
May18Moderate
Jun15Moderate
Jul11Good
Aug11Good
Sep10Good
Oct10Good
Nov11Good
Dec10Good
Location & terrain

Where is Mishōhirajō?

Mishōhirajō sits at 33.0°N, 132.6°E, 10 m above sea level, in Japan. The nearest listed city is Sukumo, 16 km away.

Topography around Mishōhirajō

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

Within 3 km, the terrain around Mishōhirajō has significant variations in elevation — a maximum elevation change of 305 m around an average of 59 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 1,052 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,529 m.

The land around Mishōhirajō is covered by trees (67%) within 3 km, trees (49%) and water (48%) within 16 km, and water (62%) and trees (36%) within 80 km.

3 km
305 m
16 km
1,052 m
80 km
1,529 m
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Sukumo 16 km · Uwajima 29 km · Nakamura 34 km · Shimoda 39 km · Uwa 45 km · Yawatahama 56 km · Ōzu 60 km · Saiki 62 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 Mishōhirajō (32.9637°, 132.5661°, elevation 10 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).