SeasonMapNozawa Onsen (Nozawa) weather in September
Japan
September in Nozawa Onsen: warm, soaked, with clean air — not the time — 19 rainy days.
#12 of 12 months in Nozawa Onsen · #1383 of 1383 destinations to visit in September · comfort 10/100 (tier F)
Updated September 2026 · climate normals from ERA5 reanalysis
Traveller notes on Nozawa Onsen in September
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Nozawa Onsen climate normals — September
| Daytime high | 24°C / 76°F | 🌤 warm |
|---|---|---|
| Nighttime low | 17°C / 62°F | |
| Feels like (high) | 27°C / 81°F | |
| Rainfall | 228 mm / 9 in | ⛈ soaked |
| Rainy days | 19 days | |
| Humidity | 88% | 💦 very humid |
| Dew point | 18°C / 64°F | |
| Sunshine | 8 h/day | |
| Daylight | 12.4 h | |
| Wind | 9 km/h / 6 mph | |
| Air quality (US AQI) | 38 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in Nozawa Onsen 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.
Quietschool holidays in 3 of the markets that fill it, one of its worst months for weather(estimated)
Peak crowdsBusyShoulder seasonQuiet
Best months for Nozawa Onsen'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).
Toughest weatherNozawa Onsen's weather peaks December–February.
Best weatherFair weatherToughest weather
Nearby, and something's on
Within 300 km of Nozawa Onsen — a day trip or a short hop — with something on this month. Never part of the comfort score.
Where is Nozawa Onsen?
Nozawa Onsen in September — FAQ
- Is September a good time to visit Nozawa Onsen?
- September in Nozawa Onsen: warm, soaked, with clean air — not the time — 19 rainy days. It ranks #12 of 12 months for Nozawa Onsen on SeasonMap's comfort score (10/100).
- What is the weather like in Nozawa Onsen in September?
- In September, Nozawa Onsen averages a daily high of 24.4°C and a low of 16.9°C, with about 228.1 mm of rain over roughly 19.2 rainy days.
- What is the air quality in Nozawa Onsen in September?
- Nozawa Onsen has a mean US Air Quality Index of about 38 in September.
Other months in Nozawa Onsen
Compare Nozawa Onsen in September
Warmer or cooler than Nozawa Onsen in September
Similar destinations in East Asia — September
Within 300 km: Hakuba's High trails and huts open around 1 Jul – 15 Oct, and Matsumoto's Kamikochi open season around 17 Apr – 15 Nov.