Katmandu Monthly Rainfall & Precipitation
This page shows both the average monthly rainfall and the number of rainy days in Katmandu, Nepal. The figures are based on a 30-year period (1990–2020) to provide a reliable average. Let's now guide you through the details for a complete overview.
Katmandu has a relatively rainy climate with high precipitation levels, averaging 2743 mm (108 in) of rainfall annually. Despite the high annual total, it does experience a distinct dry and 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))
Significant seasonal changes in precipitation occur throughout the year. During the wettest month, July receives substantial rainfall, averaging 744 mm (29 in) of precipitation, recorded across 16 rainy days.
In contrast, the driest month, December brings less rainfall, with 23 mm (0.9 in) over a single rainy day.
July, the wettest month, has a maximum daytime temperature of 26°C (79°F). The city receives 135 hours of sunshine in this period. During the driest month December you can expect a temperature of 18°C (64°F). For more detailed insights into the city's temperatures, visit our Katmandu Temperature page.
Daily Historical Precipitation
32-year average (1984-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in June
Explore Katmandu's Historical Precipitation: 1976-2026
Browse day-by-day precipitation records for Katmandu spanning 51 years. Select any month and year to see actual rainfall and snowfall recorded on each day.
Annual Rainfall in Nepal: City Comparison
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.
heavy rainfall
high
moderate
low
almost none
Katmandu vs World: Rainfall Compared
Katmandu's average annual precipitation is 2743 mm (108 in). Let's compare this to some popular worldwide tourist destinations:
Boston, USA, experiences 1238 mm (49 in) of annual precipitation, including significant snowfall during the winter.
Osaka, Japan, experiences 1507 mm (59 in) of rainfall annually, spread across the year with wetter summers.
In Tokyo, Japan, the average annual precipitation is 1528 mm (60 in), with significant summer rains due to typhoon season.
Mumbai, India, experiences a tropical monsoon climate with 1860 mm (73 in) of annual rainfall, with the majority of precipitation happening during the monsoon season from June to September.
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.
Climate change is affecting precipitation patterns worldwide, including Katmandu:
- Changing Rainfall Patterns: Global warming causes drastic changes in the patterns of rainfall. Some areas have been experiencing increased frequency and intensity of rainfall, while other areas experience longer dry spells or even droughts.
- Local Impacts: Many regions are experiencing heavier rainfall in the winter months and drier, hotter summers. This affects agriculture, water resources, and ecosystems.
- 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 Katmandu's weather, including sunshine hours, humidity levels, and temperature data, visit our Katmandu Climate page.
