Koyasan Weather in August

August in Koyasan brings very high temperatures, with daytime highs of 32°C (90°F) and nights around 23°C (73°F). Quite a bit of rainfall is expected, around 168 mm (6.6 in), so pack an umbrella.

Rainfall in Koyasan in August

On average, there are about 17 days with rain during this month, averaging 168 mm (6.6 in). Wet weather is a regular and significant part of this month. Frequent days of rain combined with high totals means proper waterproofs are worth packing.

Temperature in Koyasan in August

Daytime highs in Koyasan in August reach 32°C (90°F), with nights around 23°C (73°F). Mornings and evenings are often more comfortable than the peak afternoon hours. With overnight lows of 23°C (73°F), evenings stay pleasantly warm. These are average temperatures, but there can be hotter days. Be sure to wear appropriate clothing and stay hydrated to manage the heat.

Sunshine in Koyasan in August

Expect sunny days throughout the month, with an estimated 228 hours of sunshine. This makes it a pleasant time to visit Koyasan.

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.

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For a detailed overview over the year and the best time to visit Japan, check out our Koyasan's climate page.

Koyasan Temperature in August

Min Temperature 23°C (73°F)  

Max Temperature 32°C (90°F)  

Chance of Rain 58%  

Precipitation 168 mm (6.6 in)  

Rainy days 17 days  

Humidity 73% *  

Sunshine 228 hours *  

Percentage Sunshine *  

* Data from: Wakayama, Japan (37 KM, 23 Miles).

What to Wear in Koyasan in August

Warm but pleasant conditions in Koyasan in August. Focus on lightweight, maybe with natural fabrics, cotton blend shirts, comfortable shorts, and breathable footwear. A light cover-up for sun protection is smart too. It's going to pour! Pack a good poncho and prepare for very wet conditions. You'll definitely want to pack sunglasses and sunscreen. There will be plenty of bright sunshine this month.

What To Do in Koyasan in August

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming

8/10

Cycling

7/10

Walking

7/10

Camping

6/10

Outdoor sports

7/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit Japan, check out our Koyasan's climate page.

More climate data for Koyasan

Temperature Rainfall Sunshine Humidity

See the full Koyasan climate overview or explore weather in Japan.