Driver/Guide: Yan Lei. The day before the trip, he kindly reminded us of the meeting time/location and suggested what to wear. His explanations during the journey were very thorough, avoiding a rushed pace and allowing us to immerse ourselves in the Danjo Garan, Kongōbu-ji Temple, and Okunoin Temple; very quiet and peaceful places with incredibly blue skies. We focused on our breathing, quietly appreciating the atmosphere with our families, feeling the gentle breeze and the rustling of grass. Finally, we arrived at Origin Shrine, a truly wonderful ending.
Just got back from a summer retreat at Mount Koya and wanted to share my experience using the electronic "Mount Koya 2-Day Pass".
Initially, I was confused as to why I could only buy one pass per transaction. After trying it out, I understood – the system is very secure: each pass generates a unique link, requiring login and an email verification code to display the QR code. If you're buying for family, remember to allow time for each person to set it up on their phone.
Using it was very smooth; the bus drivers I met along the way were all very familiar with the electronic pass verification process. Mount Koya is quite large, and while some attractions can be reached on foot, I strongly recommend taking the bus as soon as you exit the cable car station. There's a considerable distance from the cable car station to the first attraction, involving a winding road that requires a bus ride. It's summer now, and the temperature on the mountain is much cooler than on the plains. The mountains are covered in soothing greenery, so I highly recommend using this voucher to plan a comfortable summer getaway!
Anonymous User
Family
Koyasan Weather, Climate and Best Time to Visit
Data source:Meteostat Update date:2025-09
Koyasan year round climate
Spring (March–May): Average 10.6–18.6°C, mild and comfortable climate, but with relatively high rainfall, especially in May. Common activities: Visiting Koyasan temples, hiking (be aware of changing weather conditions). Recommended clothing: Light jacket, long-sleeved shirt, rain gear.
Summer (June–August): Average 22.6–28.7°C, hot and humid, with occasional showers. Common activities: Visiting temples, experiencing local culture, escaping the heat in the mountains. Recommended clothing: Breathable and sweat-wicking clothing, sun hat, rain gear.
Autumn (September–November): Average 15.7–27.0°C, comfortable and pleasant climate, with reduced rainfall. Common activities: Autumn leaves viewing (in some areas), visiting temples, hiking. Recommended clothing: Light jacket, long-sleeved shirt.
Winter (December–February): Average 7.2–9.8°C, cold and dry, with little rain. Common activities: Visiting temples, experiencing onsen (in nearby areas). Recommended clothing: Warm jacket, sweater, scarf, gloves.
Koyasan climatological average
Annual average temperature: approx. 17.6°C / Annual rainfall: approx. 1794 mm / Summer humidity: 70%–80% / Rainiest month: May
Koyasan monthly average temperature and precipitation
Month
Air temperature (°C)
Precipitation (mm)
January
7.2°C
63.9
February
7.2°C
59.2
March
10.6°C
113.6
April
15.4°C
163.5
May
18.6°C
313.2
June
22.6°C
285.1
July
27.4°C
200.3
August
28.7°C
130.6
September
27°C
161.5
October
20.5°C
141
November
15.7°C
101.2
December
9.8°C
61.5
Koyasan weather for the next seven days
10/2
Friday
Sunny
20.1°C/14.4°C
10/3
Saturday
Sunny
19.9°C/12.6°C
10/4
Sunday
Overcast
20.6°C/14.9°C
10/5
Monday
Overcast
18.5°C/16.4°C
10/6
Tuesday
Overcast
18.6°C/14.9°C
10/7
Wednesday
Sunny
19.3°C/12.8°C
10/8
Thursday
Sunny
20°C/12.1°C
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