Itānagar Monthly Rainfall & Precipitation
This page shows both the average monthly rainfall and the number of rainy days in Itānagar, Arunachal Pradesh, India. The numbers reflect climate data gathered over a 30-year period, from 1990 to 2020. Now, let's break down all the details for a clearer picture.
Itānagar is known for its substantial rainfall, with annual precipitation reaching 3000 mm (118 in). While the overall climate is wet, there are notable seasonal patterns that create interesting contrasts, as demonstrated in our graph below.
Monthly Precipitation Levels
The average number of days each month with precipitation (> 0.2 mm (0.01 in))
The climate in Itānagar shows significant variation throughout the year. Expect 523 mm (21 in) of precipitation during the wettest month June, distributed over 15 rainy days.
In contrast, December offers drier and sunnier days, with around 27 mm (1.1 in) of rainfall over a single rainy day.
June, the wettest month, has a maximum daytime temperature of 29°C (84°F). During the driest month December you can expect a temperature of 22°C (72°F). For more detailed insights into the city's temperatures, visit our Itānagar Temperature page.
Daily Historical Precipitation
32-year average (1987-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in June
Explore Itānagar's Historical Precipitation: 1976-2026
Browse day-by-day precipitation records for Itānagar spanning 51 years. Select any month and year to see actual rainfall and snowfall recorded on each day.
Annual Rainfall in India: City Comparison
The map below shows the annual precipitation across India. You can also select the different months in case you are interested in a specific month.
heavy rainfall
high
moderate
low
almost none
Itānagar vs World: Rainfall Compared
Itānagar's average annual precipitation is 3000 mm (118 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.
In Seoul, South Korea, the average annual precipitation is 1237 mm (49 in), with most rain falling during the summer monsoon season.
Melbourne, Australia, has 690 mm (27 in) of rainfall annually, spread fairly evenly throughout the year.
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.
Precipitation has a very strong role in determining the local climate and ecosystem:
- 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.
- "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 Itānagar's weather, including sunshine hours, humidity levels, and temperature data, visit our Itānagar Climate page.
