Yamanashi Monthly Rainfall & Precipitation

This page shows both the average monthly rainfall and the number of rainy days in Yamanashi, Yamanashi, Japan. Long-term data from 1990 to 2020 was used to calculate these averages. Now, let's break down all the details for a clearer picture.

Yamanashi is known for its substantial rain/snowfall, with annual precipitation reaching 1856 mm (73 in). While the overall climate is wet, there are notable seasonal patterns that create interesting contrasts, as demonstrated in our graph below.

Monthly Precipitation Levels

The average number of days each month with precipitation (> 0.2 mm (0.01 in))

Yamanashi can be quite wet during September, receiving approximately 238 mm (9.4 in) of precipitation over 19 rainy days.

In contrast December, experiences much drier conditions, with 67 mm (2.6 in) of snow/rainfall, spread across 10 snowy/rainy days.

September, the wettest month, has a maximum daytime temperature of 24°C (75°F). The city receives 152 hours of sunshine in this period. During the driest month December you can expect a temperature of 7°C (45°F). For more detailed insights into the city's temperatures, visit our Yamanashi Temperature page.

Yamanashi's average annual precipitation is 1856 mm (73 in). Let's compare this to some popular worldwide tourist destinations:

In Lisbon, Portugal, the average annual precipitation is 774 mm (30 in), characterized by wet winters and dry summers typical of the Mediterranean climate.

Osaka, Japan, experiences 1507 mm (59 in) of rainfall annually, spread across the year with wetter summers.

Perth, Australia, receives 565 mm (22 in) of rainfall annually, mostly during the winter months.

Ho Chi Minh City, Vietnam, receives 1955 mm (77 in) of annual rainfall, with a pronounced wet season from May to November, typical of its tropical monsoon climate.

Precipitation amounts are measured using specific gauges installed at weather stations, collecting both rain and snow and any other type of precipitation. Rainfall is measured directly in millimeters, while that from snow and ice is obtained by melting it. Automated systems often incorporate heaters to make this easier.

Information from these stations is transmitted via Wi-Fi, satellite, GPS, or telephone connections to central monitoring networks. This information is immediately updated and integrated into weather models and forecasts.

Climate change is affecting precipitation patterns worldwide, including Yamanashi:

• Changing Rainfall Patterns: Global warming causes drastic changes in the patterns of rainfall. Some areas have been experiencing increased frequency and intensity of rainfall, while other areas experience longer dry spells or even droughts.
• Local Impacts: Many regions are experiencing heavier rainfall in the winter months and drier, hotter summers. This affects agriculture, water resources, and ecosystems.

• The U.S. has a significant number of thunderstorms every year, with over 14.6 million taking place across the world annually.
• Approximately 70% of lightning bolts strike land rather than oceans.
• A storm named John was the longest-lasting Pacific tropical storm, continuing for 31 days. As it crossed the dateline twice, it changed status from a hurricane to a typhoon and back to a hurricane.

For more detailed information about Yamanashi's weather, including sunshine hours, humidity levels, and temperature data, visit our Yamanashi Climate page.