Yamaguchi Monthly Rainfall & Precipitation

This page shows both the average monthly rainfall and the number of rainy days in Yamaguchi, Yamaguchi, Japan. This average is based on long-term data collected between 1990 and 2020. Let's now guide you through the details for a complete overview.

Yamaguchi has a relatively rain/snowy climate with high precipitation levels, averaging 1731 mm (68 in) of rain/snowfall annually.

Monthly Precipitation Levels

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

Significant seasonal changes in precipitation occur throughout the year. During the wettest month, July receives substantial rainfall, averaging 278 mm (11 in) of precipitation, recorded across 18 rainy days.

In contrast, the driest month, December brings less rainfall, with 71 mm (2.8 in) over 20 rainy days.

July, the wettest month, has a maximum daytime temperature of 31°C (88°F). The city receives 172 hours of sunshine in this period. During the driest month December you can expect a temperature of 13°C (55°F). For more detailed insights into the city's temperatures, visit our Yamaguchi Temperature page.

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.

Annual

Annual

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Legend

heavy rainfall

high

moderate

low

almost none

Heavy annual rainfall has been defined as more than 1000 mm (39 in) precipitation. High: 600 mm (24 in) to 1000 mm (39 in). Moderate: 250 mm (9.8 in) to 600 mm (24 in). Low: less than 250 mm (9.8 in).

Yamaguchi vs World: Rainfall Compared

Yamaguchi's average annual precipitation is 1731 mm (68 in). Let's compare this to some popular worldwide tourist destinations:

In Barcelona, Spain, the average annual precipitation is 620 mm (24 in), evenly distributed across the year with no extreme wet or dry seasons.

In Seoul, South Korea, the average annual precipitation is 1237 mm (49 in), with most rain falling during the summer monsoon season.

In Tokyo, Japan, the average annual precipitation is 1528 mm (60 in), with significant summer rains due to typhoon season.

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.

How is Precipitation Measured?

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.

Rainy Seasons: Many parts of the world have well-defined wet seasons where precipitation is distinctly higher. These are normally accompanied by lush vegetation and temperature patterns.

Dry Seasons: In areas where the climate is either desert or Mediterranean, the amount of precipitation is drastically reduced, leading to a shortage of water and arid conditions.

Interesting weather facts

"Ginger" was the longest-lasting Atlantic tropical storm, which spun around the open ocean for 28 days in 1971.
The world's largest snowflake was recorded in the Guinness Book of Records, at 38 cm (15 inches) wide and 20 cm (7.9 inches) thick. The snowflake fell at Fort Keogh, Montana, USA, on 28 January 1887.
The greatest snowfall recorded was on Mt. Rainier, Washington State, USA—over 31.5 meters (103 feet) fell during the winter of 1972.

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

Current rainfall in Yamaguchi

10-Day Forecast