Miyako weather in September

In September, Miyako sees average daytime highs of 20°C and overnight lows near 18°C, with 193 mm of rain across 13.4 wet days and about 12.3 hours of daylight. It is the 2nd-warmest and 1st-wettest month of the year here.

Highs ease over the month, from about 22°C in the first days to 19°C by the end. The sky is clear or mostly clear about 24% of the time in September, and the air most often feels humid.

Daylight stretches from about 12 h 54 min at the start of September to 11 h 36 min by month's end. Set against the rest of the year, September is Miyako's 9th-clearest and 9th-windiest month. For the whole year in context, see Miyako's year-round climate.

Daytime high
20°
2nd warmest
Overnight low
18°
11th coldest
Rainfall
193 mm
13.4 wet days
Daylight
12 h 18 min
5:19 AM – 5:34 PM
Cloud cover
68%
9th clearest
Wind
15 km/h
9th windiest
Solar energy
3.72 kWh/m²
Travel score
5.6
out of 10

Miyako is city in Iwate prefecture, Japan.

Density
41/km²
people per km²
Founded
1941

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 22°C in the first days to 19°C by the end.

A typical September day in Miyako reaches about 20°C in the afternoon and slips back to 18°C overnight — a 2°C spread between the day's warmth and the night's chill. On most days the high lands between 18°C and 23°C. Set against its neighbours, September runs about 2°C cooler than August and about 4°C warmer than October.

10°15°20°25°151015202530
Avg high (°C)Avg low (°C)
12220
22220
32220
42220
52220
62219
72119
82119
92119
102119
112119
122119
132119
142118
152118
162018
172018
182018
192018
202018
212017
222017
232017
241917
251917
261917
271916
281916
291916
301916

How September really feels in Miyako

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.

Miyako weather by month

How September compares with the rest of the year at a glance. September is the 2nd-warmest and 1st-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -1°729.15.19.50.0
Feb / -1°658.9610.40.0
Mar / 10011.55.411.70.2
Apr / 9910.31.1131.8
May13° / 10°10911014.23.5
Jun16° / 14°12111.5014.74.7
Jul20° / 18°15314.4014.55.5
Aug22° / 20°16613.6013.66.0
Sep20° / 18°19313.4012.35.6
Oct16° / 13°16211.4010.95.1
Nov12° / 799.60.59.83.1
Dec / 769.42.99.20.6

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 24% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 12% of September, with mostly cloudy or overcast conditions the remaining 65%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
13268
23268
33367
43367
53367
63466
73565
83565
93664
103565
113565
123664
133565
143664
153565
163565
173565
183466
193466
203466
213565
223565
233664
243664
253763
263862
273862
284060
294060
304060

Chance of precipitation in September

Any precipitation

Miyako gets around 193 mm of rain over 13.4 wet days in September, the wettest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 46% and peaks near 49% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
148
248
348
448
548
649
748
848
948
1048
1148
1248
1348
1448
1548
1647
1747
1846
1946
2045
2144
2244
2343
2443
2542
2642
2742
2842
2942
3042

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

Most of September feels humid — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, September lands in the humid band about 31% of days. Sticky, muggy-or-worse air turns up on roughly 28% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1210324314
2211324214
3211334113
4212343913
5213343812
6314353712
7315353511
8416363410
9418363210
1051936319
1162036298
1272136288
1392336267
14102435246
15122535235
16132735215
17152834194
18172933173
19193032163
20213131142
21233230132
22253329122
23273428101
2429342791
2531352581
2633352471
2735362360
2837362250
2939362050
3041361940

Wind in September

Winds average 15 km/h in September.

Across September, daily wind ranges from about 14 km/h on the calmest days to 16 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202530
Wind speed (km/h)Feels
114light breeze
214light breeze
314light breeze
414light breeze
514light breeze
614light breeze
714light breeze
815light breeze
915light breeze
1015light breeze
1115light breeze
1215light breeze
1315light breeze
1415light breeze
1515light breeze
1615light breeze
1715light breeze
1815light breeze
1915light breeze
2016light breeze
2116light breeze
2216light breeze
2316light breeze
2416light breeze
2516light breeze
2616light breeze
2716light breeze
2816light breeze
2916light breeze
3016light breeze

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 54 min at the start of September to 11 h 36 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 78 minutes over September. Sunrise moves from 5:05 AM to 5:33 AM, and sunset from 5:59 PM to 5:11 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.95:055:59
212.95:055:58
312.85:065:56
412.85:075:54
512.75:085:53
612.75:095:51
712.75:105:49
812.65:115:48
912.65:125:46
1012.55:135:44
1112.55:145:43
1212.45:155:41
1312.45:165:39
1412.35:175:38
1512.35:185:36
1612.35:195:34
1712.25:205:33
1812.25:215:31
1912.15:225:29
2012.15:235:27
2112.05:245:26
2212.05:255:24
2311.95:265:22
2411.95:275:21
2511.95:285:19
2611.85:295:17
2711.85:305:16
2811.75:315:14
2911.75:325:12
3011.65:335:11

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 3.72 kWh/m².

For context, solar energy here swings from a low near 1.98 kWh/m² to a high of 5.42 kWh/m² in May across the year — September's 3.72 kWh/m² falls in the middle.

012345151015202530
Solar energy (kWh/m²)Level
14.0Bright
24.0Bright
34.0Moderate
43.9Moderate
53.9Moderate
63.9Moderate
73.9Moderate
83.8Moderate
93.8Moderate
103.8Moderate
113.8Moderate
123.8Moderate
133.7Moderate
143.7Moderate
153.7Moderate
163.7Moderate
173.6Moderate
183.6Moderate
193.6Moderate
203.6Moderate
213.6Moderate
223.6Moderate
233.5Moderate
243.5Moderate
253.5Moderate
263.5Moderate
273.5Moderate
283.5Moderate
293.4Moderate
303.4Moderate
Planning a trip in September

Hazard calendar for Miyako

In seasonPeak

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

Miyako 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 Miyako?

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

5.6
Sightseeing
2nd-best month of the year
3.2
Beach & pool
2nd-best month of the year

September is a reasonable time to visit Miyako for sightseeing.

What to pack for Miyako in September

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

In September, Miyako sees daytime highs around 20°C and nights near 18°C. Pack rain gear. About 13 days see rain.

rain gear

Sea temperature near Miyako in September

The nearest coast averages about 21°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 21°C and coldest in March near 6°C.

It's comfortable for a long swim from Aug 4 to Sep 26 — about 1.8 months when the water holds above 20°C.

5°10°15°20°25°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmcomfortable to swim
Sea temperature (°C)Comfort
Jan10Bracing
Feb7Bracing
Mar6Bracing
Apr8Bracing
May11Bracing
Jun15Bracing
Jul18Cool
Aug21Refreshing
Sep21Refreshing
Oct18Cool
Nov15Cool
Dec13Bracing

UV index in Miyako in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 7 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Miyako peaks around August 19 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near January 1 at about 2 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highHighVery highHighModerateLowAug 19UV 9Jan 1UV 2
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar4Moderate
Apr6High
May8Very high
Jun7Very high
Jul6High
Aug9Very high
Sep7Very high
Oct5Moderate
Nov2Moderate
Dec2Low

Air quality in Miyako 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 Miyako is worst in April — around 20 µg/m³ PM2.5 (moderate), about 2.2× the cleanest month (December, 9 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodApr 1320 µg/m³Dec 169 µg/m³
PM2.5 (µg/m³)Level
Jan10Good
Feb14Moderate
Mar19Moderate
Apr20Moderate
May18Moderate
Jun13Moderate
Jul12Good
Aug10Good
Sep10Good
Oct11Good
Nov10Good
Dec9Good
Location & terrain

Where is Miyako?

Miyako sits at 39.6°N, 141.9°E, 10 m above sea level, in Japan. The nearest listed city is Yamada, 20 km away.

Topography around Miyako

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

Within 3 km, the terrain around Miyako has significant variations in elevation — a maximum elevation change of 320 m around an average of 80 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,209 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,869 m.

The land around Miyako is covered by trees (66%) and artificial surfaces (22%) within 3 km, trees (67%) and water (29%) within 16 km, and trees (60%) and water (34%) within 80 km.

3 km
320 m
16 km
1,209 m
80 km
1,869 m
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Yamada 20 km · Kamaishi 42 km · Tōno 51 km · Kuji 62 km · Ōfunato 67 km · Hizume 67 km · Morioka 68 km · Yahaba 68 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 Miyako (39.6469°, 141.9406°, 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).