The temperatures in Yakushima jump from tropic heat in the summer to Siberian cold in the winter. In the summer with high humidity it can get appallingly hot and in the winter, teeth-chatteringly cold. Exactly what temperature you might experience in Yakushima depends very much on your altitude. If you are on the coast the temperature will be higher both in summer and winter.
TEMPERATURES THIS WEEK
Look at this chart. It shows the temperatures this week on the coast in Yakushima.
Now compare this with the following chart. This shows the temperatures this week near the summit of Mt.Miyanoura.
As you might notice, there’s a huge difference in temperatures this week if you are in the mountains or on the coast.
ANNUAL TEMPERATURES
Here is a chart of the average temperatures in Yakushima around the coast.
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| Month | Average Temperature | Maximum Temperature | Minimum Temperature |
| Jan | 12.3ºC / 54ºF | 15.3ºC / 59.5ºF | 9ºC / 48.2ºF |
| Feb | 14.4ºC / 58ºF | 17.1ºC / 62.7ºF | 11.5 / 52.7ºF |
| March | 14.5ºC / 58ºF | 17.5ºC / 63ºF | 11.6ºC / 58ºF |
| April | 20.2ºC / 68.3ºF | 23.7ºC / 74.6ºF | 17.1ºC / 62.7ºF |
| May | 22.8ºC / 73ºF | 25.6ºC / 78ºF | 20.2ºC / 68.3ºF |
| June | 24.3ºC / 75.7ºF | 27.3ºC / 81ºF | 21.6ºC / 70.8ºF |
| July | 27ºC / 80ºF | 30.8ºC / 87.4ºF | 23.6ºC / 74.4ºF |
| Aug | 28ºC / 82.4ºF | 32.2ºC / 90ºF | 24.2ºC / 75.5ºF |
| Sept | 26.4ºC / 79.5ºF | 29.6ºC / 85.2ºF | 23.6ºC / 74.4ºF |
| Oct | 23.3ºC / 73.9ºF | 26ºC / 78.8ºF | 20.6ºC / 69ºF |
| Nov | 18.7ºC / 65.6ºF | 21.6ºC / 70.8ºF | 15.6ºC / 60ºF |
| Dec | 15ºC / 59ºF | 17.7ºC / 63.8ºF | 12.2ºC / 54ºF |
Now if you are wondering what this means with the temperatures in the mountains, we have you covered below. This table shows you the temperatures at each of the mountain huts (very important information if you intend to stay the night) and also popular mountain destinations.
The general rule is that for every 100m you climb the temperature decreases by 0.6º C. This means that you should allow for the following temperature changes in the mountains:
- At Jomon Sugi (1300m) the temperature is 7.8ºC below the temperatures in the above table.
- At the summit of Mt.Miyanoura (1936m) it is 11.6ºC below.
- At Shiratani Unsuikyo (825m) it is 5ºC below.
- At Takatsu hut (1330m) it is 8ºC below.
- At Shintakatsu hut (1460m) it is 8.8ºC below.
- At Shikanosawa hut (1550m) it is 9.3ºC below.
- At Yodogawa hut (1380m) it is 8.3ºC below.
- At Ishizuka hut (1600m) it is 9.6ºC below.
Click here for more details about the WEATHER on YAKUSHIMA.
