SeasonMapMiyakojima (Miyako) weather in September
Japan
September in Miyakojima: sweltering, soaked, with clean air — fine if you can take 18 rainy days.
#9 of 12 months in Miyakojima · #923 of 1383 destinations to visit in September · comfort 71/100 (tier B)
Updated September 2026 · climate normals from ERA5 reanalysis
Traveller notes on Miyakojima in September
No notes yet. Open Miyakojima on the map to add the first one.
Miyakojima climate normals — September
| Daytime high | 31°C / 87°F | 🔥 sweltering |
|---|---|---|
| Nighttime low | 26°C / 78°F | |
| Feels like (high) | 35°C / 95°F | |
| Sea temperature | 30°C / 85°F | ♨️ bath-warm |
| Rainfall | 240 mm / 9.4 in | ⛈ soaked |
| Rainy days | 18 days | |
| Humidity | 81% | 💦 very humid |
| Dew point | 25°C / 77°F | |
| Sunshine | 9.8 h/day | |
| Daylight | 12.3 h | |
| Wind | 31 km/h / 19 mph | |
| Air quality (US AQI) | 33 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in Miyakojima in September
How busy the place itself is — school and mass holidays, the months an editor tagged, and how sought-after the weather makes them. Never part of the comfort score.
Shoulder seasonschool holidays in 3 of the markets that fill it, an ordinary month(estimated)
Peak crowdsBusyShoulder seasonQuiet
Best months for Miyakojima's weather
Ranked by this destination's own climate comfort score across the year — a different thing from how busy it gets (see Crowds above).
Fair weatherMiyakojima's weather doesn't swing hard through the year — comfort stays fairly steady in every month.
What's on in Miyakojima in September
Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.
- Season
Sea warm enough to swim
1 Apr – 15 Nov · usuallyThe water off Yonaha Maehama is comfortable for most of the year. Wind and swell, not temperature, decide whether the boats to the outer reef go out on any given morning.
- Hazard
Typhoon season
1 Jul – 15 Oct · usuallyClosuresMiyako takes direct hits rather than glancing ones. Shutters go down, flights are cancelled a day either side, and the shops close — the single biggest risk to a summer trip here. Source ↗
Where is Miyakojima?
Miyakojima in September — FAQ
- Is September a good time to visit Miyakojima?
- September in Miyakojima: sweltering, soaked, with clean air — fine if you can take 18 rainy days. It ranks #9 of 12 months for Miyakojima on SeasonMap's comfort score (71/100).
- What is the weather like in Miyakojima in September?
- In September, Miyakojima averages a daily high of 30.8°C and a low of 25.8°C, with about 239.6 mm of rain over roughly 18 rainy days.
- What is the air quality in Miyakojima in September?
- Miyakojima has a mean US Air Quality Index of about 33 in September.