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

This page shows the average amount of rainfall per month in Kolkata. The numbers are calculated over a 30-year period to provide a reliable average. Now, let’s break down all the details for a clearer picture.

Kolkata experiences significant rainfall throughout the year, averaging 1675 mm of precipitation annually.

Monthly Precipitation Levels

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

The seasons in Kolkata, bring significant changes in precipitation. The wettest month, July, receives heavy rainfall, with an average of 354 mm of precipitation.

This rainfall is distributed across 15 rainy days. In contrast, the driest month, December, experiences much less rainfall, totaling 10 mm over 0 rainy days. These distinct seasonal differences provide diverse experiences throughout the year.

July, the city’s wettest month, has a maximum daytime temperature of 33°C. During the driest month December you can expect a temperature of 28°C. For more detailed insights into the city’s temperatures, visit our Kolkata Temperature page.

Annual Precipitation in India

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.

Amsterdam Precipitation Compared World Wide

Kolkata’s average annual precipitation is 1675 mm. Let’s compare this to some popular worldwide tourist destinations:

In Toronto, Canada, annual precipitation averages [964 mm], with snowy winters and rainy summers.

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

Perth, Australia, receives 565 mm of rainfall annually, mostly during the winter months.

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.

How Does Precipitation Affect Local Climate?

Precipitation has a very strong role in determining the local climate and ecosystem:

• Rainy Seasons: Many parts of the world have well-defined wet seasons where precipitation is distinctly higher. These are normally accompanied by lush vegetation and temperature patterns.
• Dry Seasons: In areas where the climate is either desert or Mediterranean, the amount of precipitation is drastically reduced, leading to a shortage of water and arid conditions.

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