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

This page shows the average amount of rainfall per month in Kathmandu. 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.

Kathmandu has a relatively rainy climate with high precipitation levels, averaging 2770 mm of rainfall annually.

Monthly Precipitation Levels

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

Kathmandu can be quite wet during July, receiving approximately 753 mm of precipitation over 16 rainy days.

In contrast December, experiences much drier conditions, with 23 mm of rainfall, spread across a single rainy day.

July, the city’s wettest month, has a maximum daytime temperature of 26°C. During the driest month December you can expect a temperature of 18°C. For more detailed insights into the city’s temperatures, visit our Kathmandu Temperature page.

Annual Precipitation in Nepal

The map below shows the annual precipitation across Nepal. You can also select the different months in case you are interested in a specific month.

Amsterdam Precipitation Compared World Wide

Kathmandu’s average annual precipitation is 2770 mm. Let’s compare this to some popular worldwide tourist destinations:

The city of Rome, Italy, has an average annual precipitation of 832 mm, spread fairly evenly throughout the year.

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

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

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

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

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