Kōyasan
10 day weather forecast for Kōyasan
Friday, 21st August 2026, at 00:46
today
30° 23°
tomorrow
30° 23°
Sunday
30° 23°
Monday
29° 23°
Tuesday
30° 23°
Wednesday
24° 22°
Thursday
25° 21°
Seemore
Kōyasan Weather Pages
Kōyasan weather forecast
The weather forecast for Kōyasan over the next 5 days indicates warm and humid conditions with a humidity level of about 81% with temperatures ranging from 29 °C to 30 °C.
Rain is expected on Friday, Sunday, Monday, and Tuesday, accompanied by a gentle breeze.
Kōyasan 14 days weather forecast
This weeks weather in Kōyasan. Click on a date for detailed forecasts
Fri. 21
30°
23°
0.9 mm
Sat. 22
30°
23°
0.1 mm
Sun. 23
30°
23°
3.2 mm
Mon. 24
29°
23°
2.1 mm
Tue. 25
30°
23°
3.5 mm
Wed. 26
24°
22°
1.6 mm
Thu. 27
25°
21°
10.6 mm
Fri. 28
31°
24°
1.2 mm
Sat. 29
32°
24°
0.9 mm
Sun. 30
31°
24°
0.1 mm
Mon. 31
32°
23°
0.1 mm
Tue. 1
32°
25°
0.9 mm
Wed. 2
27°
22°
0.9 mm
Further Ahead
You can click on date
Access Kōyasan weather forecasts with a simple click. Select any date for comprehensive insights on temperature, rainfall, and wind conditions.
Kōyasan long range weather forecast
30 day weather forecast for Kōyasan
Important Notice
Our Kōyasan long range weather forecast is based on historical data analysis rather than real-time forecasting models. While this provides a general outlook, weather conditions can change. We recommend checking the forecast closer to your planned date for the most current information.
Rain Forecast for the Next 14 Days in Kōyasan
The chart displays the expected rainfall values (in mm) over the next 14 days in Kōyasan, highlighting variations in precipitation levels for specific dates. ☔
Kōyasan Wind Speed Forecast Chart
This chart illustrates the projected daily max wind speed (in km) in Kōyasan over the next two weeks, providing insights into periods of increased or decreased wind activity. 🌀
Frequently asked questions about the weather in Kōyasan
How warm is it in Kōyasan over the next 14 days?
Over the next two weeks, temperatures in Kōyasan are expected to range from around 21 °C on the coldest nights up to about 32 °C on the warmest days. Use this range to plan what to pack and wear.
Will it rain in Kōyasan in the next two weeks?
Yes - rain is expected on about 13 of the next 14 days in Kōyasan, with roughly 26 mm of rainfall in total. It is worth keeping an umbrella or raincoat handy.
How windy is it in Kōyasan?
Maximum wind speeds in Kōyasan are forecast to reach about 17 km/h at their peak over the next 14 days.
When is the best time to visit Kōyasan?
For a month-by-month look at temperatures and rainfall, see our best time to visit Kōyasan guide.
How accurate is the 14-day forecast for Kōyasan?
Our Kōyasan forecast uses leading meteorological models and is most reliable over the next few days. Long-range days beyond a week show general trends and can change, so check back closer to the date for updates.
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Where is Kōyasan?Get accurate weather forecasts for Kōyasan, located at latitude 34.217 and longitude 135.583. Stay updated with localized weather information tailored for Kōyasan.
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