Karuizawa Rainfall & Precipitation: Monthly Averages and Year-Round Insights

This page shows the average amount of rainfall per month in Karuizawa. The numbers are calculated over a 30-year period to provide a reliable average. Let’s explore the details in depth to provide you with a complete overview.

Karuizawa has a notably wet climate with abundant precipitation, recording 1785 mm of rain/snowfall per year.

Monthly Precipitation Levels

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

Karuizawa can be quite wet during July, receiving approximately 255 mm of precipitation over 23 rainy days.

In contrast December, experiences much drier conditions, with 63 mm of snow/rainfall, spread across 15 snowy/rainy days.

July, the wettest month, has a maximum daytime temperature of 27°C. The city receives 170 hours of sunshine in this period. During the driest month December you can expect a temperature of 7°C. For more detailed insights into the city’s temperatures, visit our Karuizawa Temperature page.

Annual Precipitation in Japan

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.

Amsterdam Precipitation Compared World Wide

Karuizawa’s average annual precipitation is 1785 mm. Let’s compare this to some popular worldwide tourist destinations:

Seville, Spain, experiences 541 mm of rainfall annually, with wet winters and dry summers typical of southern Spain.

In Shanghai, China, the annual average precipitation is 1347 mm, with a humid subtropical climate.

In Brisbane, Australia, the annual precipitation is 979 mm, making it wetter than Sydney.

Kuala Lumpur, Malaysia, receives 2529 mm 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.

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 wide and 20 cm 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 fell during the winter of 1972.

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