When to see Japan's autumn leaves: decided by 10 years of temperature, not by a calendar
Ask when to see Japan's autumn colours and you usually get a fixed calendar, copied from one article to the next. The problem is that leaves do not turn on a date. They turn at a temperature, and every year's temperatures are different.
So this article does it another way. We took the ten years of temperature data this site already uses and looked at when each city actually gets cold enough for the leaves to start. You end up understanding the mechanism — which means you can read this year's forecast yourself instead of trusting fixed dates that can be a week or two out.
Leaves turn because it gets cold, not because a date arrives
Japanese maples begin to colour when the daily minimum temperature settles at around 6–8°C for several days running, and the colour deepens as the cold continues. That is why the wave moves north to south, and from high ground down to the cities, every single year.
The number to watch, then, is not the daytime high but the mean daily minimum for each month — that is what tells you whether a city has reached the level the trees respond to.
The payoff of understanding the mechanism is that this year's foliage forecast starts making sense. When a report says "a week later than usual", you know it means the cold has not arrived yet — not that someone has made a guess.
The wave runs north to south — and here are the numbers behind it
The table below is the mean daily minimum by month for five major cities, from the ERA5 2016–2025 dataset — the same one behind the weather calendar in rooozt's search bar. The arrow marks the month each city enters the 6–8°C band.
The order is unmistakable. Sapporo reaches it in October. Kyoto, Tokyo and Osaka all get there during November. Fukuoka does not until December. From the northernmost to the southernmost city, that is roughly a two-month spread.
These are also monthly means for the cities themselves. The mountains and highlands around each city are colder and therefore always turn earlier — which is exactly why the famous hillside viewing spots in every region peak weeks before the city does.
The part few people mention: the foliage month in Honshu is the dry month
Going through this dataset we found something we were not looking for — the month the leaves turn in Honshu happens to be the driest month of the season.
Kyoto averages about 191 mm across 12 rain days in October, then just 69 mm across 7 days in November. Tokyo goes from 201 mm over 13 days to 83 mm over 9. Osaka from 193 mm over 11 days to 74 mm over 7. The prettiest month and the clearest month are the same month.
But if you plan to chase the colour north to catch it earlier, the numbers flip. Sapporo averages about 109 mm over 14 wet days in October — and in November that rises to 121 mm over 17 days. More than half the month sees rain or snow. Going north for an earlier show has a cost in grey skies that most people never price in.
What this data cannot tell you
It cannot tell you the date the leaves will peak this year. A ten-year mean only tells you which cities normally cool before which others. An unusually warm year pushes everything back; an early cold snap pulls it forward. One to two weeks of drift is normal, not exceptional.
It cannot tell you that every viewing spot peaks together. A temple in the city and a valley an hour outside it can be a week apart in the same prefecture, and different trees do not turn together either — maples and ginkgos do not peak on the same day.
The right way to use it: pick your month from this table and book accommodation, then use the season's own foliage forecast — published early each autumn — to fine-tune which day you visit each spot. Book the room first, because it is the one thing that genuinely sells out and the one price that climbs hardest in this season.
Mean daily minimum, Sep–Dec (10-year average)
The arrow marks the month each city enters the 6–8°C band at which maples begin to turn. Ordered north to south.
| City | Sep | Oct | Nov | Dec |
|---|---|---|---|---|
| Sapporo | 13.9°C | 6.8°C ← | 0.5°C | −6.5°C |
| Tokyo | 21.0°C | 14.4°C | 8.2°C ← | 2.4°C |
| Kyoto | 20.5°C | 13.5°C | 6.9°C ← | 1.4°C |
| Osaka | 22.1°C | 14.9°C | 8.5°C ← | 3.4°C |
| Fukuoka | 22.1°C | 16.4°C | 10.7°C | 5.8°C ← |
The arrow marks the first month whose mean falls into the 6–8°C band. It does not mean the leaves are at their best for that whole month — colouring builds over days once the cold arrives, and high-ground viewing spots always run ahead of the cities below them.
Official sources for this year's forecast
Foliage forecasts are published early in the season and revised through it, so we link to the source rather than printing dates that would go stale.
- Japan National Tourism Organization — the official travel site ↗ (opens in a new tab)
Seasonal and regional information, including autumn colour spots area by area.
- JR East — timetables and rail passes for eastern Japan ↗ (opens in a new tab)
Useful for planning intercity travel days in the busiest rail season of the year.
Frequently asked questions
- When should I go to Kyoto for the autumn leaves?
- On the ten-year average, Kyoto enters the temperature band where leaves start turning during November, and the window most people treat as peak is mid-November into early December. Use that to choose a month and book a room — not to lock a date. Check the season's own forecast closer to the time.
- Can I see autumn colours in Hokkaido?
- Yes, and distinctly earlier than elsewhere — Sapporo reaches the relevant temperature band in October. The trade-off is the weather: Sapporo averages 17 wet days in November, more than in October. If clear skies for photographs matter, build in spare days.
- Why do other articles give different dates?
- Because they are often describing different things. Some mean mountain viewing spots, which turn weeks before the cities; some mean the cities; and some are reusing last year's dates. The safer approach is to understand the mechanism, choose a month, then adjust the day from this year's forecast.
- How far ahead should I book?
- Foliage season is among the tightest room markets of the year in Kyoto and Tokyo. Lock accommodation before anything else and book months ahead — it is the one part of the trip that genuinely sells out and the price that rises hardest.
Where the numbers come from: Every temperature and rainfall figure in this article is a 2016–2025 monthly mean from the ERA5 dataset (via the Open-Meteo Historical Weather API) at each city's coordinate — a 10-year statistic, not a forecast for your trip. Any single year can differ a lot from the mean. ERA5 is a roughly 9 km reanalysis grid, not a reading from any one weather station. This is the same dataset the weather calendar in rooozt's search bar displays.