Yamanakako Monthly Rainfall & Precipitation
This page shows both the average monthly rainfall and the number of rainy days in Yamanakako, Yamanashi, Japan. The figures are based on a 30-year period (1990–2020) to provide a reliable average. Now, let's explore all the details to give you a full picture.
Yamanakako has a notably wet climate with abundant precipitation, recording 2155 mm (85 in) of rain/snowfall per year. It does, however, have a distinct rainy season during certain months. Have a look at our detailed charts below to see how precipitation varies throughout the year.
Monthly Precipitation Levels
The average number of days each month with precipitation (> 0.2 mm (0.01 in))
Yamanakako can be quite wet during September, receiving approximately 274 mm (11 in) of precipitation over 19 rainy days.
In contrast December, experiences much drier conditions, with 86 mm (3.4 in) of rainfall, spread across 10 rainy days.
September, the wettest month, has a maximum daytime temperature of 25°C (77°F). During the driest month December you can expect a temperature of 10°C (50°F). For more detailed insights into the city's temperatures, visit our Yamanakako Temperature page.
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in July
Explore Yamanakako's Historical Precipitation: 1976-2026
Browse day-by-day precipitation records for Yamanakako spanning 51 years. Select any month and year to see actual rainfall and snowfall recorded on each day.
Annual Rainfall in Japan: City Comparison
The map below shows the annual precipitation across Japan. You can also select the different months in case you are interested in a specific month.
heavy rainfall
high
moderate
low
almost none
Yamanakako vs World: Rainfall Compared
Yamanakako's average annual precipitation is 2155 mm (85 in). Let's compare this to some popular worldwide tourist destinations:
The climate in San Francisco, USA, is influenced by coastal weather, with 469 mm (18 in) of rainfall mostly during the winter months.
In Shanghai, China, the annual average precipitation is 1347 mm (53 in), with a humid subtropical climate.
Adelaide, Australia, enjoys 511 mm (20 in) of annual precipitation, with dry summers and wet winters.
Kuala Lumpur, Malaysia, receives 2529 mm (100 in) of annual rainfall, characteristic of its equatorial tropical rainforest climate, with consistent rainfall throughout the year and peak months during March and November.
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.
- Mawsynram in India is noted as being the wettest place on earth, with over 11 meters (36 feet) of rain falling every year.
- In contrast, Antofagasta in Chile is among the driest places on the planet, getting less than 0.1mm (0.004 inches) per year, with some years recording virtually no rainfall.
- Nearly 1,650 thunderstorm cells are estimated over the planet at any given time.
For more detailed information about Yamanakako's weather, including sunshine hours, humidity levels, and temperature data, visit our Yamanakako Climate page.
