SeasonMapMatsumoto weather in September
Japan
September in Matsumoto: hot, soaked, with clean air — fine if you can take 18 rainy days.
#6 of 12 months in Matsumoto · #921 of 1383 destinations to visit in September · comfort 71/100 (tier B)
Updated September 2026 · climate normals from ERA5 reanalysis
Traveller notes on Matsumoto in September
Other months in Matsumoto
Matsumoto's forum calls May genuinely changeable — regulars describe a run of three sunny days followed by a day or two of rain, so packing for everything from short sleeves to a rain parka is standard advice. Up at Kamikochi, in the mountains within Matsumoto's borders, early mornings can still flirt with freezing even in May, considerably colder than the city itself; a light down layer for the evening is worth it if you're heading up there.
Add your own note from Matsumoto's card on the map.
Matsumoto climate normals — September
| Daytime high | 27°C / 81°F | 🥵 hot |
|---|---|---|
| Nighttime low | 18°C / 64°F | |
| Feels like (high) | 30°C / 86°F | |
| Rainfall | 215 mm / 8.5 in | ⛈ soaked |
| Rainy days | 18 days | |
| Humidity | 82% | 💦 very humid |
| Dew point | 17°C / 62°F | |
| Sunshine | 8.2 h/day | |
| Daylight | 12.4 h | |
| Wind | 8 km/h / 5 mph | |
| Air quality (US AQI) | 34 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in Matsumoto 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.
BusySeiji Ozawa Matsumoto Festival, school holidays in 3 of the markets that fill it(estimated)
Peak crowdsBusyShoulder seasonQuiet
Best months for Matsumoto'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 weatherMatsumoto's weather peaks April–June, best around May.
Best weatherFair weatherToughest weather
What's on in Matsumoto in September
Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.
- Opening
Kamikochi open season
17 Apr – 15 Nov · usuallyTrail seasonBook earlyThe valley opens with a ceremony in the middle of April and closes on 15 November, when the hotels shut and the road is gated. Private cars are never allowed in; it is the bus from Sawando or Hirayu. Source ↗
- Festival
Seiji Ozawa Matsumoto Festival
15 Aug – 10 Sep · usuallyMajor festivalBook earlyCrowdedThree weeks of orchestral concerts and an opera, founded by Ozawa and still the reason the town's hotels fill in late summer. Tickets go months ahead. Source ↗
Nearby, and something's on
Within 300 km of Matsumoto — a day trip or a short hop — with something on this month. Never part of the comfort score.
Where is Matsumoto?
Matsumoto in September — FAQ
- Is September a good time to visit Matsumoto?
- September in Matsumoto: hot, soaked, with clean air — fine if you can take 18 rainy days. It ranks #6 of 12 months for Matsumoto on SeasonMap's comfort score (71/100).
- What is the weather like in Matsumoto in September?
- In September, Matsumoto averages a daily high of 27.3°C and a low of 17.6°C, with about 215.2 mm of rain over roughly 17.6 rainy days.
- What is the air quality in Matsumoto in September?
- Matsumoto has a mean US Air Quality Index of about 34 in September.
Other months in Matsumoto
Compare Matsumoto in September
Warmer or cooler than Matsumoto in September
Similar destinations in East Asia — September
Within 300 km: Hakuba's High trails and huts open around 1 Jul – 15 Oct, and Fujikawaguchiko's Mount Fuji climbing season on 1 Jul – 10 Sep.