Chase the autumn leaves in Japan
Japan is one of these cases which turns into a gold, yellow and orange fairy tale starting from September. And we can honestly say: We cannot imagine a more beautiful season to visit Japan.
Koyasan Weather in September
September in Koyasan brings high temperatures around 28°C (82°F) during the day, dropping to 19°C (66°F) at night, with quite a bit of rainfall expected, averaging around 214 mm (8.4 in) for the month.
Rainfall in Koyasan in September
Based on our climate data of the past 30 years, about 18 days of rain are anticipated, with 214 mm (8.4 in) on average. Expect frequent rainfall this month, and not just light drizzle. When it rains, it tends to come down hard.
Temperature in Koyasan in September
Temperatures in Koyasan in September top out at 28°C (82°F) and drop to 19°C (66°F) overnight. This gives the month a fairly typical daily rhythm, with warmer afternoons and more comfortable nights. With overnight lows of 19°C (66°F), evenings can feel noticeably cooler than the daytime. An extra layer is a good idea, though the cool air makes for a good night's sleep.
Sunshine in Koyasan in September
With about 162 hours of sunshine, the area enjoys a nice balance of sun and overcast, creating a pleasant environment.For Koyasan itself, May generally stands out with the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.
Koyasan Temperature in September
Min Temperature
19°C (66°F)
Max Temperature
28°C (82°F)
Chance of Rain
61%
Precipitation
214 mm (8.4 in)
Rainy days
18 days
Humidity
73% *
Sunshine
162 hours *
Percentage Sunshine
*
* Data from: Wakayama, Japan (37 KM, 23 Miles).
Koyasan Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Koyasan - and find the best time to visit.
Best Places in Japan in September
Find out more about the weather in Japan and which places have the best travel conditions in this month. See all of Japan in September →
perfect weather
pleasant
tolerable
unpleasant
poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
What to Wear in Koyasan in September
Warm weather calls for comfortable, breathable clothing in September. Cotton t-shirts, shorts, light dresses, and sandals are perfect. You might still want a light layer for evenings or air-conditioned places (for example buses). Also bring a poncho, it will rain a lot! Waterproof everything you can. It won't hurt to bring your sunglasses along, as you'll see some sunny periods.
What To Do in Koyasan in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Swimming7/10 -
Cycling7/10 -
Walking7/10 -
Camping6/10 -
Outdoor sports7/10
Koyasan 3-Day Forecast
More climate data for Koyasan
Temperature Rainfall Sunshine Humidity
See the full Koyasan climate overview or explore weather in Japan.
Popular in September
Where to go in September - average daytime high across popular destinations.
Bucket list
Need travel inspiration? Check out our bucket list articles and be inspired.
Chase the autumn leaves in Japan
Walk the 88 temple circuit
We recommend walking the 88 temple circuit from April til October. Although June, July and August can be a bit wet, hot and humid.
The famous bamboo forests of Arashiyama
The famous bamboo forests of Arashiyama lie just outside the city center of Kyoto and is unique in the world. If you look at photos of this bamboo forest, it looks like you have landed in a fairy-tale world.
10 reasons why you should visit Japan in winter
Here are 10 reasons why you should plan a winter trip to Japan. During this period, popular sights are less busy and prices for flights and hotels much cheaper.