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Koyama

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Koyama Weather, Climate and Best Time to Visit

Data source：Meteostat
Update date：2025-09

Koyama year round climate

  • Spring (March–May): 46–63°F on average, with a mild climate but increasing rainfall. March remains relatively cold, while May starts to warm up. Common activities: flower viewing, enjoying nature. Recommended clothing: spring/autumn jacket, comfortable trousers or skirt, and an umbrella.
  • Summer (June–August): 70–80°F on average, with a hot and humid climate and heavy rainfall, particularly in June. Common activities: swimming, outdoor activities (avoid afternoon thunderstorms). Recommended clothing: light and breathable clothing, short sleeves, shorts, and sunscreen.
  • Autumn (September–November): 52–75°F on average, with a comfortable and pleasant climate, gradually decreasing temperatures, and reduced rainfall. Common activities: viewing autumn leaves, hiking in the countryside. Recommended clothing: light jacket, long-sleeved shirt, and comfortable trousers.
  • Winter (December–February): 35–40°F on average, with a cold and dry climate and low rainfall. Common activities: skiing (requires travelling to mountainous areas), indoor activities. Recommended clothing: thick coat, sweater, warm socks, hat, scarf, and gloves.

Koyama climatological average

Annual average temperature: approx. 57.9°F / Annual rainfall: approx. 1443 mm / Summer humidity: 70%–80% / Rainiest month: June

Koyama monthly average temperature and precipitation

Month
Air temperature (°F)
Precipitation (mm)
January
36°F
25.7
February
38.5°F
41.1
March
46.8°F
103.5
April
57.2°F
121.6
May
63.1°F
162.2
June
70.9°F
220.6
July
79.7°F
185.7
August
80.2°F
164.2
September
75.6°F
197.2
October
62.1°F
118.7
November
52.5°F
81.7
December
40.6°F
21.7

Koyama weather for the next seven days

4/22
Wednesday
Partly Cloudy
72.5°F/55.1°F
4/23
Thursday
Patchy rain nearby
70.1°F/56.3°F
4/24
Friday
Sunny
71°F/54.6°F
4/25
Saturday
Sunny
69.9°F/51.9°F
4/26
Sunday
Partly Cloudy
67.8°F/57.9°F
4/27
Monday
Patchy rain nearby
65.2°F/57.3°F
4/28
Tuesday
Patchy rain nearby
77.1°F/59.2°F

Koyama Frequently Asked Questions and Useful Information for Travel

What is the meaning of Koyama in Japanese?

In Japanese, Koyama is written as 小山, which translates to 'small mountain'. This name is common throughout Japan and is found in several locations.

Who is John Koyama and what is he known for?

John Koyama is a highly acclaimed Stunt Coordinator and Fight Coordinator in Hollywood, with over 100 film and television credits. HYPEBEAST recognized him as one of the top stunt coordinators for his work on the television show Preacher.

Who is the stunt coordinator for The Boys?

The stunt coordinator for the popular television show The Boys is Emmy award-winning John Koyama. He has earned two Emmy Awards for his contributions to the show's 2025 and 2023 seasons and served as a supervising stunt coordinator.

What are some notable works of actor Rikiya Koyama?

Rikiya Koyama, born in Kyoto, Japan, is an actor recognized for his roles in 'Final Fantasy: The Spirits Within' (2001), 'Demon Slayer: Kimetsu no Yaiba - The Movie: Mugen Train' (2020), and 'Vampire Hunter D: Bloodlust' (2000).

What can I expect when planning independent travel to Koyama in 2025?

Independent travel to Koyama in 2025 offers a chance to explore its unique charm at your own pace. Prepare for an enriching journey with KKday's comprehensive travel guide.