Okutama Monthly Rainfall & Precipitation

This page shows both the average monthly rainfall and the number of rainy days in Okutama, Tokyo Prefecture, Japan. These averages rely on historical data collected over 30 years, from 1990 to 2020. Let's explore the details to provide you with a complete overview.

Okutama has a relatively rain/snowy climate with high precipitation levels, averaging 2093 mm (82 in) of rain/snowfall annually. Despite the high annual total, it does experience a distinct rainy season during certain months. Examine our detailed charts below to understand these seasonal patterns.

Monthly Precipitation Levels

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

The climate in Okutama shows significant variation throughout the year. Expect 274 mm (11 in) of precipitation during the wettest month September, distributed over 20 rainy days.

In contrast, December offers drier and sunnier days, with around 69 mm (2.7 in) of rainfall over 8 rainy days.

September, the wettest month, has a maximum daytime temperature of 25°C (77°F). The city receives 152 hours of sunshine in this period. 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 Okutama Temperature page.

Okutama's average annual precipitation is 2093 mm (82 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.

Adelaide, Australia, enjoys 511 mm (20 in) of annual precipitation, with dry summers and wet winters.

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.

• 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 Okutama's weather, including sunshine hours, humidity levels, and temperature data, visit our Okutama Climate page.